{ "name": "ScanChess scoresheet recognition benchmark", "date": "2026-10-16", "page": "https://scanchess.com/accuracy", "license": "Result tables: CC BY 4.0. Images keep their own licenses (see each sheet's imageLicense).", "run": { "date": "2026-10-16", "model": "google/gemini-3-flash-preview (response modelVersion: gemini-3-flash-preview)", "thinkingLevel": "low (gateway default; production does not override it)", "codeVersion": "origin/main 5fe3b53a (after PR #158/#159), extracted with git archive", "path": "createScanService().scanScoresheet() + createAiGateway(): production prompt, output budget (8192 + 2048 per extra page, + 8192 thinking reserve), JSON mode, 45 s timeout, 1 retry, response validation and notation translation. In-memory repository stub: no production API, no database, no credits.", "moveBoxes": "off (SCAN_MOVE_BOXES default)", "systemPromptSha256": "62c0ea19ddc784599663d78ac88807e5facf3658db33542c67a69472fe771ad4", "imagePreprocessing": "As the web client (apps/web/src/lib/imageUpload.ts): EXIF-rotate, longest edge <= 2000 px, white background, JPEG quality 0.85 (done with Pillow instead of a browser canvas).", "runsPerSheet": 1, "modelApiCalls": 8, "flagRules": "lowConfidence: token conf < 0.85 (SUSPICIOUS_CONFIDENCE_THRESHOLD); implausible: findImplausibilities() marks both plies of a hung-and-ignored piece; firstIllegal: findFirstIllegalPly(), the one red mark. Same functions and threshold as the web review screen (apps/web/src/store/gameStore.ts).", "scoring": "Plies aligned to the ground truth with a minimum-edit (Levenshtein) alignment. A recognized ply is correct when it names the played move in the true position: exact SAN after stripping +, #, x and =, or a spelling that resolves uniquely to the played move (so Nxe5/Ne5 and Rd1-d5/R1d5 count, while an ambiguous 'Nd7' does not). wrong = substituted, missing = ground-truth ply with no recognized ply, extra = recognized ply with no ground-truth ply (a written 'Resigns' returned as a move counts as extra). accuracy = correct / ground-truth plies. 'reading' additionally accepts English descriptive notation (P-K4) when it can describe the played move in the true position; lenient, and a diagnostic only, because the product cannot turn descriptive notation into PGN." }, "notes": [ "Per-sheet results only: six scored sheets and two blank controls are too few for an overall accuracy figure.", "status: correct | wrong | missing | extra. flaggedYellow: model confidence below 0.85 (the review screen's yellow flag). firstIllegal: the first move that does not replay legally (the review screen's red mark).", "Descriptive-notation sheets (P-K4) are not supported by ScanChess; their reads count as wrong because they cannot become PGN." ], "sheets": [ { "id": "demo-ruy-lopez", "title": "ScanChess demo sheet: Ruy Lopez, Breyer (fictional players)", "difficulty": "easy", "notation": "english", "synthetic": true, "supportedNotation": true, "imageSource": null, "imageLicense": "Own work (ScanChess). Rendered by apps/web/scripts/render-demo-scoresheet.mjs with Caveat and Inter (SIL OFL 1.1).", "imageAttribution": "ScanChess demo sheet", "groundTruthPgn": "[Event \"Spring Open (fictional demo)\"]\n[Date \"2026.05.12\"]\n[White \"A. Rivera (fictional)\"]\n[Black \"M. Okafor (fictional)\"]\n[Result \"1/2-1/2\"]\n[PlyCount \"65\"]\n\n1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15. a4 c5 16. d5 c4 17. Bg5 h6 18. Be3 Nc5 19. Qd2 h5 20. Bg5 Be7 21. Rad1 Qc7 22. Bf4 Rf8 23. Nh2 Nh7 24. Be3 Bf6 25. Nf3 Bg7 26. Qc1 Kh8 27. Bd2 Nf6 28. Nh2 Rae8 29. f4 exf4 30. Bxf4 Nfxe4 31. Nxe4 Nxe4 32. Bxe4 Rxe4 33. Rxe4 1/2-1/2", "groundTruthSource": "Self-made synthetic sheet. Moves are the legal prefix of `line` in apps/web/scripts/render-demo-scoresheet.mjs (the script that rendered the image); the image shows exactly these 65 plies.", "groundTruthPlies": 65, "counts": { "correct": 65, "wrong": 0, "missing": 0, "extra": 0 }, "flags": { "yellow": 0, "firstIllegal": 0 }, "plies": [ { "moveNo": "1.", "expected": "e4", "read": "e4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "1...", "expected": "e5", "read": "e5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2.", "expected": "Nf3", "read": "Nf3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2...", "expected": "Nc6", "read": "Nc6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3.", "expected": "Bb5", "read": "Bb5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3...", "expected": "a6", "read": "a6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4.", "expected": "Ba4", "read": "Ba4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4...", "expected": "Nf6", "read": "Nf6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5.", "expected": "O-O", "read": "O-O", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5...", "expected": "Be7", "read": "Be7", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6.", "expected": "Re1", "read": "Re1", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6...", "expected": "b5", "read": "b5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7.", "expected": "Bb3", "read": "Bb3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7...", "expected": "d6", "read": "d6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8.", "expected": "c3", "read": "c3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8...", "expected": "O-O", "read": "O-O", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9.", "expected": "h3", "read": "h3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9...", "expected": "Nb8", "read": "Nb8", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10.", "expected": "d4", "read": "d4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10...", "expected": "Nbd7", "read": "Nbd7", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "11.", "expected": "Nbd2", "read": "Nbd2", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "11...", "expected": "Bb7", "read": "Bb7", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "12.", "expected": "Bc2", "read": "Bc2", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "12...", "expected": "Re8", "read": "Re8", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "13.", "expected": "Nf1", "read": "Nf1", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "13...", "expected": "Bf8", "read": "Bf8", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "14.", "expected": "Ng3", "read": "Ng3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "14...", "expected": "g6", "read": "g6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "15.", "expected": "a4", "read": "a4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "15...", "expected": "c5", "read": "c5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "16.", "expected": "d5", "read": "d5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "16...", "expected": "c4", "read": "c4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "17.", "expected": "Bg5", "read": "Bg5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "17...", "expected": "h6", "read": "h6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "18.", "expected": "Be3", "read": "Be3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "18...", "expected": "Nc5", "read": "Nc5", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "19.", "expected": "Qd2", "read": "Qd2", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "19...", "expected": "h5", "read": "h5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "20.", "expected": "Bg5", "read": "Bg5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "20...", "expected": "Be7", "read": "Be7", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "21.", "expected": "Rad1", "read": "Rad1", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "21...", "expected": "Qc7", "read": "Qc7", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "22.", "expected": "Bf4", "read": "Bf4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "22...", "expected": "Rf8", "read": "Rf8", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "23.", "expected": "Nh2", "read": "Nh2", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "23...", "expected": "Nh7", "read": "Nh7", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "24.", "expected": "Be3", "read": "Be3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "24...", "expected": "Bf6", "read": "Bf6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "25.", "expected": "Nf3", "read": "Nf3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "25...", "expected": "Bg7", "read": "Bg7", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "26.", "expected": "Qc1", "read": "Qc1", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "26...", "expected": "Kh8", "read": "Kh8", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "27.", "expected": "Bd2", "read": "Bd2", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "27...", "expected": "Nf6", "read": "Nf6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "28.", "expected": "Nh2", "read": "Nh2", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "28...", "expected": "Rae8", "read": "Rae8", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "29.", "expected": "f4", "read": "f4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "29...", "expected": "exf4", "read": "exf4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "30.", "expected": "Bxf4", "read": "Bxf4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "30...", "expected": "Nfxe4", "read": "Nfxe4", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "31.", "expected": "Nxe4", "read": "Nxe4", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "31...", "expected": "Nxe4", "read": "Nxe4", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "32.", "expected": "Bxe4", "read": "Bxe4", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "32...", "expected": "Rxe4", "read": "Rxe4", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "33.", "expected": "Rxe4", "read": "Rxe4", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false } ] }, { "id": "opera-demo", "title": "ScanChess demo photo: Morphy v Duke of Brunswick & Count Isouard (Opera Game), 1858", "difficulty": "easy", "notation": "english", "synthetic": true, "supportedNotation": true, "imageSource": null, "imageLicense": "Own work (ScanChess demo sheet, 'DEMO SHEET - not an official tournament scoresheet'). The 1858 game score is public domain.", "imageAttribution": "ScanChess demo sheet", "groundTruthPgn": "[Event \"Paris, Opera house\"]\n[Date \"1858.??.??\"]\n[White \"Paul Morphy\"]\n[Black \"Duke Karl of Brunswick and Count Isouard\"]\n[Result \"1-0\"]\n[PlyCount \"33\"]\n\n1. e4 e5 2. Nf3 d6 3. d4 Bg4 4. dxe5 Bxf3 5. Qxf3 dxe5 6. Bc4 Nf6 7. Qb3 Qe7 8. Nc3 c6 9. Bg5 b5 10. Nxb5 cxb5 11. Bxb5+ Nbd7 12. O-O-O Rd8 13. Rxd7 Rxd7 14. Rd1 Qe6 15. Bxd7+ Nxd7 16. Qb8+ Nxb8 17. Rd8# 1-0", "groundTruthSource": "The Opera Game (Morphy v Duke of Brunswick & Count Isouard, Paris 1858), the standard published score (e.g. chessgames.com gid=1233404). The demo sheet deliberately writes 7...Qe7 so it looks like 'Qe1', 9...b5 like '65', and 14.Rd1 after a struck-out 'Rd8'; the ground truth is the move actually played.", "groundTruthPlies": 33, "counts": { "correct": 33, "wrong": 0, "missing": 0, "extra": 0 }, "flags": { "yellow": 0, "firstIllegal": 0 }, "plies": [ { "moveNo": "1.", "expected": "e4", "read": "e4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "1...", "expected": "e5", "read": "e5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2.", "expected": "Nf3", "read": "Nf3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2...", "expected": "d6", "read": "d6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3.", "expected": "d4", "read": "d4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3...", "expected": "Bg4", "read": "Bg4", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4.", "expected": "dxe5", "read": "dxe5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4...", "expected": "Bxf3", "read": "Bxf3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5.", "expected": "Qxf3", "read": "Qxf3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5...", "expected": "dxe5", "read": "dxe5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6.", "expected": "Bc4", "read": "Bc4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6...", "expected": "Nf6", "read": "Nf6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7.", "expected": "Qb3", "read": "Qb3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7...", "expected": "Qe7", "read": "Qe7", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8.", "expected": "Nc3", "read": "Nc3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8...", "expected": "c6", "read": "c6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9.", "expected": "Bg5", "read": "Bg5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9...", "expected": "b5", "read": "b5", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10.", "expected": "Nxb5", "read": "Nxb5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10...", "expected": "cxb5", "read": "cxb5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "11.", "expected": "Bxb5+", "read": "Bxb5+", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "11...", "expected": "Nbd7", "read": "Nbd7", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "12.", "expected": "O-O-O", "read": "O-O-O", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "12...", "expected": "Rd8", "read": "Rd8", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "13.", "expected": "Rxd7", "read": "Rxd7", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "13...", "expected": "Rxd7", "read": "Rxd7", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "14.", "expected": "Rd1", "read": "Rd1", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "14...", "expected": "Qe6", "read": "Qe6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "15.", "expected": "Bxd7+", "read": "Bxd7+", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "15...", "expected": "Nxd7", "read": "Nxd7", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "16.", "expected": "Qb8+", "read": "Qb8+", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "16...", "expected": "Nxb8", "read": "Nxb8", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "17.", "expected": "Rd8#", "read": "Rd8#", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false } ] }, { "id": "hund-finkenzeller-1973", "title": "J. Hund v Finkenzeller, Berliner Silvesterturnier 1973, round 1", "difficulty": "medium", "notation": "german", "synthetic": false, "supportedNotation": true, "imageSource": "https://commons.wikimedia.org/wiki/File:Hund,J.-Finkenzeller_Silvester_-1973.jpg", "imageLicense": "CC BY-SA 4.0", "imageAttribution": "Photo: GFHund, Wikimedia Commons, CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Resized for this benchmark.", "groundTruthPgn": "[Event \"Berliner Silvesterturnier 1973, round 1\"]\n[Date \"1973.12.??\"]\n[White \"Juliane Hund\"]\n[Black \"Finkenzeller\"]\n[Result \"1-0\"]\n[PlyCount \"45\"]\n\n1. c4 Nf6 2. Nc3 c6 3. g3 d5 4. cxd5 cxd5 5. Bg2 e6 6. d4 Be7 7. Nf3 Nc6 8. O-O O-O 9. Bf4 a6 10. Rc1 b5 11. Nxb5 axb5 12. Rxc6 Ne8 13. Qb3 Bb7 14. Rc2 Qb6 15. Rfc1 Bd6 16. Bd2 Nf6 17. Bb4 Bxb4 18. Qxb4 Nd7 19. a3 Rfc8 20. Nd2 Rxc2 21. Rxc2 Ra4 22. Qe7 Nf8 23. Rc7 1-0", "groundTruthSource": "No published score found. Transcribed from the Commons photo at full resolution (2137x3035), replayed legally with chess.js, and checked against a second, independent transcription made without seeing the first; the two matched on all 45 plies. Black resigned after 23.Rc7 ('aufgg.').", "groundTruthPlies": 45, "counts": { "correct": 43, "wrong": 2, "missing": 0, "extra": 0 }, "flags": { "yellow": 0, "firstIllegal": 1 }, "plies": [ { "moveNo": "1.", "expected": "c4", "read": "c4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "1...", "expected": "Nf6", "read": "Nf6", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2.", "expected": "Nc3", "read": "Nc3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2...", "expected": "c6", "read": "c6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3.", "expected": "g3", "read": "g3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3...", "expected": "d5", "read": "d5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4.", "expected": "cxd5", "read": "cxd5", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4...", "expected": "cxd5", "read": "cxd5", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5.", "expected": "Bg2", "read": "Bg2", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5...", "expected": "e6", "read": "e6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6.", "expected": "d4", "read": "d4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6...", "expected": "Be7", "read": "Be7", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7.", "expected": "Nf3", "read": "Nf3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7...", "expected": "Nc6", "read": "Nc6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8.", "expected": "O-O", "read": "O-O", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8...", "expected": "O-O", "read": "O-O", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9.", "expected": "Bf4", "read": "Bf4", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9...", "expected": "a6", "read": "a6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10.", "expected": "Rc1", "read": "Rc1", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10...", "expected": "b5", "read": "b5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "11.", "expected": "Nxb5", "read": "Nxb5", "confidence": 0.97, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "11...", "expected": "axb5", "read": "axb5", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "12.", "expected": "Rxc6", "read": "Rxc6", "confidence": 0.97, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "12...", "expected": "Ne8", "read": "Ne8", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "13.", "expected": "Qb3", "read": "Qb3", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "13...", "expected": "Bb7", "read": "Bb7", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "14.", "expected": "Rc2", "read": "Rc2", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "14...", "expected": "Qb6", "read": "Qb6", "confidence": 0.97, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "15.", "expected": "Rfc1", "read": "Rfc1", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "15...", "expected": "Bd6", "read": "Bd6", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "16.", "expected": "Bd2", "read": "Bd2", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "16...", "expected": "Nf6", "read": "Nf6", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "17.", "expected": "Bb4", "read": "Bf4", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "17...", "expected": "Bxb4", "read": "Bxf4", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "18.", "expected": "Qxb4", "read": "Qxb4", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": true }, { "moveNo": "18...", "expected": "Nd7", "read": "Nd7", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "19.", "expected": "a3", "read": "a3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "19...", "expected": "Rfc8", "read": "Rfc8", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "20.", "expected": "Nd2", "read": "Nd2", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "20...", "expected": "Rxc2", "read": "Rxc2", "confidence": 0.97, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "21.", "expected": "Rxc2", "read": "Rxc2", "confidence": 0.97, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "21...", "expected": "Ra4", "read": "Ra4", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "22.", "expected": "Qe7", "read": "Qe7", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "22...", "expected": "Nf8", "read": "Nf8", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "23.", "expected": "Rc7", "read": "Rc7", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false } ] }, { "id": "reti-capablanca-1924", "title": "R. Reti v J. R. Capablanca, New York 1924, round 5", "difficulty": "hard", "notation": "german", "synthetic": false, "supportedNotation": true, "imageSource": "https://commons.wikimedia.org/wiki/File:Planilha_R%C3%A9ti_e_Capablanca.gif", "imageLicense": "Public domain (Wikimedia Commons: PD-old; 1924 manuscript, writer probably Reti, d. 1929)", "imageAttribution": "Score-sheet via Wikimedia Commons (public domain)", "groundTruthPgn": "[Event \"New York 1924, round 5\"]\n[Date \"1924.03.22\"]\n[White \"Richard Reti\"]\n[Black \"Jose Raul Capablanca\"]\n[Result \"1-0\"]\n[PlyCount \"61\"]\n\n1. Nf3 Nf6 2. c4 g6 3. b4 Bg7 4. Bb2 O-O 5. g3 b6 6. Bg2 Bb7 7. O-O d6 8. d3 Nbd7 9. Nbd2 e5 10. Qc2 Re8 11. Rfd1 a5 12. a3 h6 13. Nf1 c5 14. b5 Nf8 15. e3 Qc7 16. d4 Be4 17. Qc3 exd4 18. exd4 N6d7 19. Qd2 cxd4 20. Bxd4 Qxc4 21. Bxg7 Kxg7 22. Qb2+ Kg8 23. Rxd6 Qc5 24. Rad1 Ra7 25. Ne3 Qh5 26. Nd4 Bxg2 27. Kxg2 Qe5 28. Nc4 Qc5 29. Nc6 Rc7 30. Ne3 Ne5 31. R1d5 1-0", "groundTruthSource": "chessgames.com gid=1102101 (PGN download, PlyCount 61). Matches the sheet's 31.Td1-d5 and Black's 'Aufgegeben'.", "groundTruthPlies": 61, "counts": { "correct": 40, "wrong": 21, "missing": 0, "extra": 1 }, "flags": { "yellow": 0, "firstIllegal": 1 }, "plies": [ { "moveNo": "1.", "expected": "Nf3", "read": "Nf3", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "1...", "expected": "Nf6", "read": "Nf6", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2.", "expected": "c4", "read": "c4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2...", "expected": "g6", "read": "g6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3.", "expected": "b4", "read": "b4", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3...", "expected": "Bg7", "read": "Bg7", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4.", "expected": "Bb2", "read": "Bb2", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4...", "expected": "O-O", "read": "O-O", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5.", "expected": "g3", "read": "g3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5...", "expected": "b6", "read": "b6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6.", "expected": "Bg2", "read": "Bg2", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6...", "expected": "Bb7", "read": "Bb7", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7.", "expected": "O-O", "read": "O-O", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7...", "expected": "d6", "read": "d6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8.", "expected": "d3", "read": "d3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8...", "expected": "Nbd7", "read": "Nbd7", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9.", "expected": "Nbd2", "read": "Nbd2", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9...", "expected": "e5", "read": "e5", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10.", "expected": "Qc2", "read": "Qc2", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10...", "expected": "Re8", "read": "Re8", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "11.", "expected": "Rfd1", "read": "Rfd1", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "11...", "expected": "a5", "read": "a5", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "12.", "expected": "a3", "read": "a3", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "12...", "expected": "h6", "read": "h6", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "13.", "expected": "Nf1", "read": "Nf1", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "13...", "expected": "c5", "read": "Nf8", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "14.", "expected": "b5", "read": "Nb3", "confidence": 0.9, "status": "wrong", "flaggedYellow": false, "firstIllegal": true }, { "moveNo": "14...", "expected": "Nf8", "read": "axb4", "confidence": 0.85, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "15.", "expected": "e3", "read": "e3", "confidence": 0.98, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "15...", "expected": "Qc7", "read": "Qc7", "confidence": 0.92, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "16.", "expected": "d4", "read": "d4", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "16...", "expected": "Be4", "read": "Be6", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "17.", "expected": "Qc3", "read": "Nc3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "17...", "expected": "exd4", "read": "c6", "confidence": 0.99, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "18.", "expected": "exd4", "read": "cxd", "confidence": 0.9, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "18...", "expected": "N6d7", "read": "Nfd7", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "19.", "expected": "Qd2", "read": "Bd2", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "19...", "expected": "cxd4", "read": "fxd", "confidence": 0.85, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "20.", "expected": "Bxd4", "read": "Bxd4", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "20...", "expected": "Qxc4", "read": "Bxe7", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "21.", "expected": "Bxg7", "read": "Bxg7", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "21...", "expected": "Kxg7", "read": "Kxg7", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "22.", "expected": "Qb2+", "read": "Bd2+", "confidence": 0.9, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "22...", "expected": "Kg8", "read": "Kg8", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "23.", "expected": "Rxd6", "read": "Rxa1", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "23...", "expected": "Qc5", "read": "Rxa1", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "24.", "expected": "Rad1", "read": "Rad1", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "24...", "expected": "Ra7", "read": "Ra5", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "25.", "expected": "Ne3", "read": "Ne1", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "25...", "expected": "Qh5", "read": "Qa5", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "26.", "expected": "Nd4", "read": "Nd1", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "26...", "expected": "Bxg2", "read": "Bxg2", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "27.", "expected": "Kxg2", "read": "Kxg2", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "27...", "expected": "Qe5", "read": "Qe5", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "28.", "expected": "Nc4", "read": "Nc3", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "28...", "expected": "Qc5", "read": "f5", "confidence": 0.99, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "29.", "expected": "Nc6", "read": "Nc6", "confidence": 0.92, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "29...", "expected": "Rc7", "read": "Ra7", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "30.", "expected": "Ne3", "read": "Ne3", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "30...", "expected": "Ne5", "read": "Ne5", "confidence": 0.95, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "31.", "expected": "R1d5", "read": "Rd1-d5", "confidence": 0.9, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": null, "expected": null, "read": "Resigns", "confidence": 0.95, "status": "extra", "flaggedYellow": false, "firstIllegal": false } ] }, { "id": "eisenberg-capablanca-1909", "title": "L. R. Eisenberg v J. R. Capablanca, New York (Rice Chess Club), 15 April 1909", "difficulty": "hard", "notation": "descriptive", "synthetic": false, "supportedNotation": false, "imageSource": "https://commons.wikimedia.org/wiki/File:Planilha_Eisenberg_e_Capablanca.jpg", "imageLicense": "Public domain (Wikimedia Commons: PD-old; Capablanca's manuscript, d. 1942)", "imageAttribution": "Capablanca's score-sheet, Edward Winter collection, via Wikimedia Commons (public domain)", "groundTruthPgn": "[Event \"Rice Chess Club, New York\"]\n[Date \"1909.04.15\"]\n[White \"Louis R. Eisenberg\"]\n[Black \"Jose Raul Capablanca\"]\n[Result \"0-1\"]\n[PlyCount \"126\"]\n\n1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Qd4 11. f4 Bc5 12. Rf1 Bb6 13. c3 Qd6 14. b4 Nb7 15. Qa4 Bd7 16. Na3 O-O 17. Nac4 Qc7 18. Nxd7 Nxd7 19. Qc2 Rfe8 20. a4 a5 21. Rb1 Rad8 22. Qb3 Ba7 23. Ba3 axb4 24. cxb4 c5 25. b5 Na5 26. Nxa5 Qxa5 27. Bb2 Nb6 28. Qc3 Qxc3 29. Bxc3 Nxa4 30. Be5 Bb8 31. b6 Re6 32. Bc7 Rf8 33. Bd1 Bxc7 34. bxc7 Rb6 35. Ra1 Nb2 36. Bg4 Rc6 37. c8=Q Rfxc8 38. Bxc8 Rxc8 39. Ke2 Rd8 40. g3 Kh7 41. f5 Nc4 42. Ra2 Rd5 43. g4 Ne5 44. Rf4 Nd3 45. Rf1 Ne5 46. Ra4 c4 47. h3 Nf3 48. Rxc4 Rxd2+ 49. Ke3 Rh2 50. Rd1 Ng5 51. Rd8 Rxh3+ 52. Ke2 Rh2+ 53. Ke3 Rh3+ 54. Kd2 g6 55. f6 e3+ 56. Ke2 Ne6 57. Rd7 g5 58. Rxf7+ Kg6 59. Re7 Kxf6 60. Rxe6+ Kxe6 61. Re4+ Kd5 62. Rxe3 Rxe3+ 63. Kxe3 Ke5 0-1", "groundTruthSource": "Edward Winter, Chess Notes C.N. 4551 (chesshistory.com/winter/winter25.html), transcribed from this same score-sheet; also Kings, Commoners and Knaves pp. 65-66. White resigned after 63...Ke5.", "groundTruthPlies": 126, "counts": { "correct": 1, "wrong": 70, "missing": 55, "extra": 0 }, "flags": { "yellow": 2, "firstIllegal": 1 }, "plies": [ { "moveNo": "1.", "expected": "e4", "read": "P-K4", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": true }, { "moveNo": "1...", "expected": "e5", "read": "P-K4", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2.", "expected": "Nf3", "read": "Kt-KB3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2...", "expected": "Nc6", "read": "Kt-QB3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3.", "expected": "Bc4", "read": "B-B4", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3...", "expected": "Nf6", "read": "Kt-B3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4.", "expected": "Ng5", "read": "Kt-Kt5", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4...", "expected": "d5", "read": "P-Q4", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5.", "expected": "exd5", "read": "PxP", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5...", "expected": "Na5", "read": "Kt-R4", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6.", "expected": "Bb5+", "read": "B-Kt5+", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6...", "expected": "c6", "read": "P-B3", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7.", "expected": "dxc6", "read": "PxP", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7...", "expected": "bxc6", "read": "PxP", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8.", "expected": "Be2", "read": "B-K2", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "8...", "expected": "h6", "read": "P-KR3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9.", "expected": "Nf3", "read": "Kt-B3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "9...", "expected": "e4", "read": "P-K5", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10.", "expected": "Ne5", "read": "Kt-K5", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "10...", "expected": "Qd4", "read": "Q-Q5", "confidence": 0.92, "status": "wrong", 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"missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "21...", "expected": "Rad8", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "22.", "expected": "Qb3", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "22...", "expected": "Ba7", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "23.", "expected": "Ba3", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "23...", "expected": "axb4", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "24.", "expected": "cxb4", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "24...", "expected": "c5", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "25.", "expected": "b5", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "25...", "expected": "Na5", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "26.", "expected": "Nxa5", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "26...", "expected": "Qxa5", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "27.", "expected": "Bb2", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "27...", "expected": "Nb6", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "28.", "expected": "Qc3", "read": null, "confidence": null, 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null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "39.", "expected": "Ke2", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "39...", "expected": "Rd8", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "40.", "expected": "g3", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "40...", "expected": "Kh7", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "41.", "expected": "f5", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "41...", "expected": "Nc4", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "42.", "expected": "Ra2", "read": 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"read": "KtxB", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "46.", "expected": "Ra4", "read": "KtxKt", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "46...", "expected": "c4", "read": "Q-B2", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "47.", "expected": "h3", "read": "KR-K", "confidence": 0.88, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "47...", "expected": "Nf3", "read": "Q-QKt2", "confidence": 0.85, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "48.", "expected": "Rxc4", "read": "P-QR4", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "48...", "expected": "Rxd2+", "read": "P-QR4", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "49.", "expected": "Ke3", "read": "QR-Q", "confidence": 0.9, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "49...", "expected": "Rh2", "read": "Q-Kt3", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "50.", "expected": "Rd1", "read": "B-R2", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "50...", "expected": "Ng5", "read": "B-R3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "51.", "expected": "Rd8", "read": "PxP", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "51...", "expected": "Rxh3+", "read": "PxP", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "52.", "expected": "Ke2", "read": "P-B4", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "52...", "expected": "Rh2+", "read": "P-Kt5", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "53.", "expected": "Ke3", "read": "Kt-R4", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "53...", "expected": "Rh3+", "read": "KtxKt", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "54.", "expected": "Kd2", "read": "QxKt", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "54...", "expected": "g6", "read": "B-Kt2", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "55.", "expected": "f6", "read": "Kt-Kt3", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "55...", "expected": "e3+", "read": "Q-B3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "56.", "expected": "Ke2", "read": "QxQ", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "56...", "expected": "Ne6", "read": "BxQ", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "57.", "expected": "Rd7", "read": "KtxP", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "57...", "expected": "g5", "read": "R-K5", "confidence": 0.9, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "58.", "expected": "Rxf7+", "read": "B-Kt5", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "58...", "expected": "Kg6", "read": "B-Kt6", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "59.", "expected": "Re7", "read": "R-K3", "confidence": 0.92, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "59...", "expected": "Kxf6", "read": "B-B7", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "60.", "expected": "Rxe6+", "read": "R-KB", "confidence": 0.88, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "60...", "expected": "Kxe6", "read": "B-Q", "confidence": 0.85, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "61.", "expected": "Re4+", "read": "BxB", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "61...", "expected": "Kd5", "read": "PxB", "confidence": 0.98, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "62.", "expected": "Rxe3", "read": "R-QR3", "confidence": 0.9, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "62...", "expected": "Rxe3+", "read": "Q-QR", "confidence": 0.8, "status": "wrong", "flaggedYellow": true, "firstIllegal": false }, { "moveNo": "63.", "expected": "Kxe3", "read": "Kt-Kt7", "confidence": 0.85, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "63...", "expected": "Ke5", "read": "Resigns", "confidence": 0.99, "status": "wrong", "flaggedYellow": false, "firstIllegal": false } ] }, { "id": "fischer-najdorf-1970", "title": "R. J. Fischer v M. Najdorf, Siegen Olympiad 1970, Final A round 3", "difficulty": "hard", "notation": "descriptive", "synthetic": false, "supportedNotation": false, "imageSource": "https://commons.wikimedia.org/wiki/File:Fischer_Score_Card.jpg", "imageLicense": "Public domain (Wikimedia Commons: PD-ineligible; uploader: 'I own the score sheet, I took this picture, I release the picture to be used for any purpose.')", "imageAttribution": "Score-sheet scan via Wikimedia Commons (public domain)", "groundTruthPgn": "[Event \"Siegen Olympiad Final-A, round 3\"]\n[Date \"1970.09.16\"]\n[White \"Robert James Fischer\"]\n[Black \"Miguel Najdorf\"]\n[Result \"1-0\"]\n[PlyCount \"96\"]\n\n1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. c4 Bd7 8. Nc3 Nc6 9. Be3 Be7 10. h3 Ne5 11. Be2 Rc8 12. Qb3 Qc7 13. Rac1 O-O 14. f4 Nc6 15. Nf3 Qb8 16. Qd1 Be8 17. Qd2 Na5 18. b3 b6 19. Bd3 Nc6 20. Qf2 b5 21. Rfd1 Nb4 22. Bf1 bxc4 23. bxc4 a5 24. Nd4 Qa8 25. Qf3 Na6 26. Ndb5 Nc5 27. e5 dxe5 28. Qxa8 Rxa8 29. fxe5 Nfe4 30. Nd6 Bc6 31. Ncxe4 Nxe4 32. c5 Ng3 33. Bc4 h5 34. Bf2 h4 35. Bxg3 hxg3 36. Bb5 Bxb5 37. Nxb5 f6 38. Rd7 Bd8 39. Rc3 fxe5 40. Rxg3 Rf7 41. Rxf7 Kxf7 42. c6 Bb6+ 43. Kf1 Kf8 44. c7 Rc8 45. a4 e4 46. Ke2 e5 47. Rg6 Bd4 48. h4 Bb2 1-0", "groundTruthSource": "chessgames.com gid=1044320 (PGN download, PlyCount 96).", "groundTruthPlies": 96, "counts": { "correct": 2, "wrong": 68, "missing": 26, "extra": 0 }, "flags": { "yellow": 22, "firstIllegal": 1 }, "plies": [ { "moveNo": "1.", "expected": "e4", "read": "P-K4", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": true }, { "moveNo": "1...", "expected": "c5", "read": "P-QB4", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2.", "expected": "Nf3", "read": "N-KB3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "2...", "expected": "e6", "read": "P-Q3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3.", "expected": "d4", "read": "P-Q4", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "3...", "expected": "cxd4", "read": "PxP", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4.", "expected": "Nxd4", "read": "NxP", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "4...", "expected": "a6", "read": "P-QR3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5.", "expected": "Bd3", "read": "B-Q3", "confidence": 0.9, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "5...", "expected": "Nf6", "read": "N-KB3", "confidence": 0.95, "status": "wrong", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6.", "expected": "O-O", "read": "O-O", "confidence": 0.99, "status": "correct", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "6...", "expected": "d6", "read": null, "confidence": null, "status": "missing", "flaggedYellow": false, "firstIllegal": false }, { "moveNo": "7.", "expected": "c4", "read": 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"title": "Blank Polish scoresheet form 'Zapis partii szachowej'", "imageSource": "https://commons.wikimedia.org/wiki/File:Chess_Score_Sheet.jpg", "imageLicense": "Public domain (PD-self, photo by Przemyslaw Jahr; form design by Pawel Jaroch)", "imageAttribution": "Przemyslaw Jahr / Wikimedia Commons (the author asks to be credited)", "outcome": "refused: no moves on the sheet", "movesInvented": 0 }, { "id": "blank-anotacion-027", "title": "Blank Spanish scoresheet form (Coldeportes 'Anotacion 027')", "imageSource": "https://commons.wikimedia.org/wiki/File:Anotaci%C3%B3n_027.jpg", "imageLicense": "CC BY-SA 2.5 Colombia (author EVD, credit Coldeportes)", "imageAttribution": "EVD / Coldeportes, Wikimedia Commons, CC BY-SA 2.5 CO", "outcome": "refused: no moves on the sheet", "movesInvented": 0 } ] }