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Classic game replay

Sidney Norman Bernstein vs Robert James Fischer, 1957

This replay preserves the complete 87-ply score of Fischer playing Black across 44 numbered moves. The board can be advanced one ply at a time; the notes stick to observable board changes rather than guessing at the players’ intentions.

On this page
  1. Practice positions
  2. Replay with move-by-move board facts
  3. PGN
  4. Sources and checking
  5. Continue with another game
White
Sidney Norman Bernstein
Black
Robert James Fischer
Event
USA-ch
Year
1957
Result
0-1
Opening
B99 Sicilian Defense: Najdorf Variation, Main Line

Opening reference: Sicilian Defense: Najdorf Variation, Main Line (B99).

In this game, 20 half-moves are labelled opening, 67 middlegame and 0 endgame. The score contains 14 captures and 3 checks or mates; before a recorded move, the position offered a median of 31 legal choices. The source score ends after 44.Rf3 with the recorded result 0-1. Its termination tag was not retained, so this record does not infer whether the game ended by resignation, time or another cause.

Practice positions

The daily trainer uses a short set of positions from this complete score. Each link goes to the exact half-move rather than only the numbered move.

  1. 7...Be7 — Develop the bishop7...Be7 was a leading choice in the fixed engine check.
  2. 13...exd5 — Exchange on d513...exd5 was a leading choice in the fixed engine check.
  3. 22...Nd7 — Create pressure on f622...Nd7 was a leading choice in the fixed engine check.
  4. 29...Be4 — Create pressure on f329...Be4 was a leading choice in the fixed engine check.
  5. 43...Kg7 — Reposition the king43...Kg7 was a leading choice in the fixed engine check.

Replay with move-by-move board facts

The board, fact panel and transcript use the same legal score. “Fixed engine check” means Stockfish 17.1, one thread, a fixed 25,000-node search and 3 candidate lines. It compares moves under one reproducible setting; it does not claim to reconstruct a player’s thoughts.

♜♞♝♛♚♝♞♜♟♟♟♟♟♟♟♟♟♟♟♟♟♟♟♟♜♞♝♛♚♝♞♜
Sidney Norman Bernstein vs Robert James Fischer, 1957

Start position

Use Previous and Next on the board, or select a move in the transcript. The board fact and fixed engine check remain visible until you choose another move.

Opening · 1.e4 to 10...b5

  1. 1.e4 Claim central space

    Board fact: White moves the pawn from e2 to e4; from there it controls d5 and f5.

    Fixed engine check: Ranked first · e4 e5 Nf3 Nc6.

  2. 1...c5 Advance the c-pawn

    Board fact: Black moves the pawn from c7 to c5; from there it controls d4.

    Fixed engine check: Ranked first · c5 Nc3 Nc6 Nf3.

  3. 2.Nf3 Develop the knight

    Board fact: White develops the knight from g1 to f3; from there it controls d4 and e5.

    Fixed engine check: Ranked first · Nf3 e6 c3 d5.

  4. 2...d6 Advance the d-pawn

    Board fact: Black moves the pawn from d7 to d6; from there it controls e5 and c5.

    Fixed engine check: Ranked first · d6 Nc3 a6 d4.

  5. 3.d4 Change the pawn structure

    Board fact: White moves the pawn from d2 to d4; the move changes the central pawn contact; from d4 it attacks Black's pawn on c5.

    Fixed engine check: Ranked first · d4 cxd4 Nxd4 Nf6.

  6. 3...cxd4 Exchange on d4

    Board fact: Black's pawn takes the pawn on d4; the move changes the central pawn contact; Black accepts doubled pawns on the d-file; black is ahead by 1 conventional material point after the capture.

    Fixed engine check: Ranked first · cxd4 Nxd4.

  7. 4.Nxd4 Recapture on d4

    Board fact: White's knight recaptures the pawn on d4; from d4 it reinforces the pawn on c2; material is level after the capture.

    Fixed engine check: Ranked first · Nxd4 Nf6 Nc3 a6.

  8. 4...Nf6 Develop the knight

    Board fact: Black develops the knight from g8 to f6; from f6 it attacks White's pawn on e4.

    Fixed engine check: Ranked first · Nf6 Nc3.

  9. 5.Nc3 Develop the knight

    Board fact: White develops the knight from b1 to c3; from there it controls d5 and e4.

    Fixed engine check: Ranked first · Nc3 g6 Be3 Nc6.

  10. 5...a6 Advance the a-pawn

    Board fact: Black moves the pawn from a7 to a6.

    Fixed engine check: Ranked first · a6 Bg5 Nbd7 Be2.

  11. 6.Bg5 Develop the bishop

    Board fact: White develops the bishop from c1 to g5; from g5 it attacks Black's knight on f6.

    Fixed engine check: Ranked first · Bg5 e6 Qf3 h6.

  12. 6...e6 Advance the e-pawn

    Board fact: Black moves the pawn from e7 to e6; from there it controls d5 and f5.

    Fixed engine check: Ranked first · e6 Qf3 h6 Bh4.

  13. 7.f4 Advance the f-pawn

    Board fact: White moves the pawn from f2 to f4; from there it controls e5.

    Fixed engine check: Ranked first · f4 h6 Bxf6 Qxf6.

  14. 7...Be7 Develop the bishop

    Board fact: Black develops the bishop from f8 to e7; from there it controls d6 and f6.

    Fixed engine check: Ranked first · Be7 Qf3.

  15. 8.Qf3 Reposition the queen

    Board fact: White moves the queen from d1 to f3; from there it controls e4, c3 and d3.

    Fixed engine check: Ranked first · Qf3 Bd7 O-O-O h6.

  16. 8...Nbd7 Develop the knight

    Board fact: Black develops the knight from b8 to d7; from there it controls e5, c5 and f6.

    Fixed engine check: Ranked first · Nbd7.

  17. 9.O-O-O Queenside castling

    Board fact: White castles queenside, moving the king to c1 and the rook to d1. The move changes king safety and develops the rook in one turn.

    Fixed engine check: Ranked first · O-O-O Qc7 Bh4 b5.

  18. 9...Qc7 Create pressure on c3

    Board fact: Black moves the queen from d8 to c7; from c7 it attacks White's knight on c3.

    Fixed engine check: Ranked first · Qc7 Kb1 b5 e5.

  19. 10.g4 Advance the g-pawn

    Board fact: White moves the pawn from g2 to g4; from there it controls f5.

    Fixed engine check: Ranked first · g4 b5 Bxf6 Nxf6.

  20. 10...b5 Advance the b-pawn

    Board fact: Black moves the pawn from b7 to b5; from there it controls c4.

    Fixed engine check: Ranked first · b5 Bxf6 Nxf6 g5.

Middlegame · 11.Bg2 to 44.Rf3

  1. 11.Bg2 Develop the bishop

    Board fact: White develops the bishop from f1 to g2; from there it controls f3.

    Fixed engine check: Near the leading choice · Bg2 Rb8.

  2. 11...Bb7 Develop the bishop

    Board fact: Black develops the bishop from c8 to b7; from b7 it attacks White's pawn on e4.

    Fixed engine check: Ranked first · Bb7 a3 O-O Kb1.

  3. 12.Rhe1 Improve the rook

    Board fact: White moves the rook from h1 to e1; from there it controls e4 and e3.

    Fixed engine check: Playable; a3 ranked higher · Rhe1 h6.

  4. 12...b4 Create pressure on c3

    Board fact: Black moves the pawn from b5 to b4; from b4 it attacks White's knight on c3.

    Fixed engine check: Recorded move; O-O ranked higher · b4 Nd5.

  5. 13.Nd5 Create pressure on c7

    Board fact: White moves the knight from c3 to d5; from d5 it attacks Black's queen on c7 and Black's bishop on e7.

    Fixed engine check: Ranked first · Nd5 exd5 exd5 Rc8.

  6. 13...exd5 Exchange on d5

    Board fact: Black's pawn takes the knight on d5; the move changes the central pawn contact; Black accepts doubled pawns on the d-file; from d5 it attacks White's pawn on e4; black is ahead by 3 conventional material points after the capture.

    Fixed engine check: Ranked first · exd5 exd5 Kf8 Nc6.

  7. 14.exd5 Recapture on d5

    Board fact: White's pawn recaptures the pawn on d5; the move changes the central pawn contact; black is ahead by 2 conventional material points after the capture.

    Fixed engine check: Ranked first · exd5 Rc8 Bh4 Kf8.

  8. 14...Kf8 Reposition the king

    Board fact: Black moves the king from e8 to f8; from f8 it reinforces the bishop on e7.

    Fixed engine check: Ranked first · Kf8 Bh4 Rc8 Qe2.

  9. 15.Nf5 Create pressure on e7

    Board fact: White moves the knight from d4 to f5; from f5 it attacks Black's bishop on e7 and Black's pawn on d6.

    Fixed engine check: Playable; Bh4 ranked higher · Nf5 Bd8.

  10. 15...Re8 Rook on the open e-file

    Board fact: Black moves the rook from a8 to e8; the rook now occupies the open e-file; from e8 it reinforces the bishop on e7.

    Fixed engine check: Near the leading choice · Re8 Bh4 Bxd5 Qg3.

  11. 16.Qe3 Create pressure on e7

    Board fact: White moves the queen from f3 to e3; from e3 it attacks Black's bishop on e7.

    Fixed engine check: Playable; Bh4 ranked higher · Qe3 Bd8.

  12. 16...Bd8 Reposition the bishop

    Board fact: Black moves the bishop from e7 to d8; from there it controls f6.

    Fixed engine check: Ranked first · Bd8 Qd2 Rxe1 Rxe1.

  13. 17.Qd4 Create pressure on f6

    Board fact: White moves the queen from e3 to d4; from d4 it attacks Black's knight on f6 and Black's pawn on b4.

    Fixed engine check: Playable; Qxe8+ ranked higher · Qd4 Rxe1.

  14. 17...Bc8 Reposition the bishop

    Board fact: Black moves the bishop from b7 to c8; from c8 it reinforces the knight on d7.

    Fixed engine check: Ranked first · Bc8 Bh4 Rxe1 Bxe1.

  15. 18.Bh4 Create pressure on f6

    Board fact: White moves the bishop from g5 to h4; from h4 it attacks Black's knight on f6.

    Fixed engine check: Playable; Rxe8+ ranked higher · Bh4 Rxe1 Rxe1 g6.

  16. 18...Nc5 Improve the knight

    Board fact: Black moves the knight from d7 to c5; from there it controls e4, d3 and e6.

    Fixed engine check: Ranked first · Nc5 Rxe8+ Nxe8 Nxd6.

  17. 19.Nxg7 Exchange on g7

    Board fact: White's knight takes the pawn on g7; from g7 it attacks Black's rook on e8; black is ahead by 1 conventional material point after the capture.

    Fixed engine check: Ranked first · Nxg7 Kxg7.

  18. 19...Kxg7 Recapture on g7

    Board fact: Black's king recaptures the knight on g7; from g7 it reinforces the rook on h8; black is ahead by 4 conventional material points after the capture.

    Fixed engine check: Near the leading choice · Kxg7 g5 Rhg8 gxf6+.

  19. 20.g5 Create pressure on f6

    Board fact: White moves the pawn from g4 to g5; from g5 it attacks Black's knight on f6.

    Fixed engine check: Ranked first · g5 Rhg8 gxf6+ Kh8.

  20. 20...Bf5 Develop the bishop

    Board fact: Black develops the bishop from c8 to f5; from f5 it attacks White's pawn on c2.

    Fixed engine check: Recorded move; Rxe1 ranked higher · Bf5 gxf6+.

  21. 21.gxf6+ Capture with check on f6

    Board fact: White's pawn takes the knight on f6; the move checks Black's king; the move changes the central pawn contact; White accepts doubled pawns on the f-file; black is ahead by 1 conventional material point after the capture.

    Fixed engine check: Ranked first · gxf6+.

  22. 21...Kh6 Answering the check

    Board fact: Black answers the check by moving the king from g7 to h6; from h6 it reinforces the pawn on h7.

    Fixed engine check: Ranked first · Kh6 Rxe8 Rxe8 Qf2.

  23. 22.Qc4 Create pressure on c5

    Board fact: White moves the queen from d4 to c4; from c4 it attacks Black's knight on c5 and Black's pawn on a6.

    Fixed engine check: Recorded move; Kb1 ranked higher · Qc4 Rxe1.

  24. 22...Nd7 Create pressure on f6

    Board fact: Black moves the knight from c5 to d7; from d7 it attacks White's pawn on f6.

    Fixed engine check: Ranked first · Nd7 Bg5+ Kg6 Qb3.

  25. 23.Qxc7 Exchange on c7

    Board fact: White's queen takes the queen on c7; from c7 it attacks Black's knight on d7 and Black's bishop on d8; white is ahead by 8 conventional material points after the capture.

    Fixed engine check: Ranked first · Qxc7 Bxc7.

  26. 23...Bxc7 Recapture on c7

    Board fact: Black's bishop recaptures the queen on c7; from c7 it reinforces the pawn on d6; black is ahead by 1 conventional material point after the capture.

    Fixed engine check: Ranked first · Bxc7.

  27. 24.Bf3 Reposition the bishop

    Board fact: White moves the bishop from g2 to f3; from there it controls d5 and e4.

    Fixed engine check: Playable; Re7 ranked higher · Bf3 Rxe1 Rxe1 Bb6.

  28. 24...Bd8 Create pressure on f6

    Board fact: Black moves the bishop from c7 to d8; from d8 it attacks White's pawn on f6.

    Fixed engine check: Ranked first · Bd8 Bg5+ Kg6 Rg1.

  29. 25.Bg5+ A forcing check

    Board fact: White moves the bishop from h4 to g5; the move checks Black's king; from there it controls f4 and f6.

    Fixed engine check: Playable; Rg1 ranked higher · Bg5+ Kg6.

  30. 25...Kg6 Answering the check

    Board fact: Black answers the check by moving the king from h6 to g6; from g6 it attacks White's bishop on g5 and White's pawn on f6.

    Fixed engine check: Ranked first · Kg6 h4 h5 Re2.

  31. 26.Rg1 Rook on the open g-file

    Board fact: White moves the rook from e1 to g1; the rook now occupies the open g-file; from g1 it reinforces the rook on d1.

    Fixed engine check: Ranked first · Rg1 Bxf6 Bh4+ Kh6.

  32. 26...Bxf6 Exchange on f6

    Board fact: Black's bishop takes the pawn on f6; from f6 it attacks White's bishop on g5 and White's pawn on b2; black is ahead by 2 conventional material points after the capture.

    Fixed engine check: Ranked first · Bxf6 Bh4+ Kh6 Bxf6.

  33. 27.Bh4+ A forcing check

    Board fact: White moves the bishop from g5 to h4; the move checks Black's king; from h4 it attacks Black's bishop on f6.

    Fixed engine check: Near the leading choice · Bh4+ Kh6 Rg5 Bxg5.

  34. 27...Kh6 Answering the check

    Board fact: Black answers the check by moving the king from g6 to h6; from h6 it reinforces the pawn on h7.

    Fixed engine check: Ranked first · Kh6 Bxf6 Nxf6 Rg5.

  35. 28.Bxf6 Exchange on f6

    Board fact: White's bishop takes the bishop on f6; from f6 it attacks Black's rook on h8; white is ahead by 1 conventional material point after the capture.

    Fixed engine check: Ranked first · Bxf6 Nxf6 Rg5 Bc8.

  36. 28...Nxf6 Recapture on f6

    Board fact: Black's knight recaptures the bishop on f6; from f6 it attacks White's pawn on d5; black is ahead by 2 conventional material points after the capture.

    Fixed engine check: Ranked first · Nxf6 Rg5 Bc8 Rd4.

  37. 29.Rg5 Rook on the open g-file

    Board fact: White moves the rook from g1 to g5; the rook now occupies the open g-file; from g5 it attacks Black's bishop on f5.

    Fixed engine check: Ranked first · Rg5 Bc8 Rd4 a5.

  38. 29...Be4 Create pressure on f3

    Board fact: Black moves the bishop from f5 to e4; from e4 it attacks White's bishop on f3 and White's pawn on c2.

    Fixed engine check: Ranked first · Be4 Be2 Rhg8 Rdg1.

  39. 30.Rf1 Improve the rook

    Board fact: White moves the rook from d1 to f1; from there it controls f3.

    Fixed engine check: Playable; Be2 ranked higher · Rf1 Rhg8 Bd1 Rg6.

  40. 30...Bg6 Create pressure on c2

    Board fact: Black moves the bishop from e4 to g6; from g6 it attacks White's pawn on c2.

    Fixed engine check: Playable; Rhg8 ranked higher · Bg6 Bd1.

  41. 31.Rfg1 Rook on the open g-file

    Board fact: White moves the rook from f1 to g1; the rook now occupies the open g-file; from g1 it reinforces the rook on g5.

    Fixed engine check: Near the leading choice · Rfg1 Ne4 R5g4 f5.

  42. 31...Re3 Rook on the open e-file

    Board fact: Black moves the rook from e8 to e3; the rook now occupies the open e-file; from e3 it attacks White's bishop on f3.

    Fixed engine check: Recorded move; Ne4 ranked higher · Re3 R5g3 Rhe8 Rh3+.

  43. 32.Bd1 Reposition the bishop

    Board fact: White moves the bishop from f3 to d1; from there it controls f3.

    Fixed engine check: Near the leading choice · Bd1 Rhe8 h4 Rh3.

  44. 32...Ne4 Create pressure on g5

    Board fact: Black moves the knight from f6 to e4; from e4 it attacks White's rook on g5.

    Fixed engine check: Ranked first · Ne4 h4 f6 R5g2.

  45. 33.R5g2 Rook on the open g-file

    Board fact: White moves the rook from g5 to g2; the rook now occupies the open g-file; from g2 it attacks Black's bishop on g6.

    Fixed engine check: Ranked first · R5g2 a5 h4 Bf5.

  46. 33...f5 Advance the f-pawn

    Board fact: Black moves the pawn from f7 to f5; from there it controls e4.

    Fixed engine check: Ranked first · f5 h4 Rf8 Rg5.

  47. 34.Be2 Develop the bishop

    Board fact: White develops the bishop from d1 to e2; from e2 it attacks Black's pawn on a6.

    Fixed engine check: Ranked first · Be2 a5 h4 Rf8.

  48. 34...a5 Advance the a-pawn

    Board fact: Black moves the pawn from a6 to a5; from a5 it reinforces the pawn on b4.

    Fixed engine check: Ranked first · a5 h4 Rf8 Bd3.

  49. 35.h4 Advance the h-pawn

    Board fact: White moves the pawn from h2 to h4.

    Fixed engine check: Ranked first · h4 Rf8 Bd3 Rh3.

  50. 35...Rh3 Create pressure on h4

    Board fact: Black moves the rook from e3 to h3; from h3 it attacks White's pawn on h4.

    Fixed engine check: Near the leading choice · Rh3 h5 Bf7 Bd3.

  51. 36.h5 Create pressure on g6

    Board fact: White moves the pawn from h4 to h5; from h5 it attacks Black's bishop on g6.

    Fixed engine check: Ranked first · h5 Bf7 Rg7 Rf8.

  52. 36...Bxh5 Exchange on h5

    Board fact: Black's bishop takes the pawn on h5; from h5 it attacks White's bishop on e2; black is ahead by 3 conventional material points after the capture.

    Fixed engine check: Playable; Bf7 ranked higher · Bxh5 Bxh5 Rxh5 c4.

  53. 37.Bd3 Create pressure on e4

    Board fact: White moves the bishop from e2 to d3; from d3 it attacks Black's knight on e4.

    Fixed engine check: Playable; Bxh5 ranked higher · Bd3 Re8 b3 Rh4.

  54. 37...Bg6 Reposition the bishop

    Board fact: Black moves the bishop from h5 to g6; from there it controls f5.

    Fixed engine check: Ranked first · Bg6 a3 b3 Bxe4.

  55. 38.Rf1 Improve the rook

    Board fact: White moves the rook from g1 to f1; from there it controls f3 and f4.

    Fixed engine check: Playable; Bxe4 ranked higher · Rf1 Nc5 Bc4 Kg7.

  56. 38...Rf8 Improve the rook

    Board fact: Black moves the rook from h8 to f8; from there it controls f5 and f6.

    Fixed engine check: Ranked first · Rf8 Kb1 Nc5 Rfg1.

  57. 39.Kd1 Reposition the king

    Board fact: White moves the king from c1 to d1; from d1 it reinforces the pawn on c2.

    Fixed engine check: Near the leading choice · Kd1 Rc8 Bxe4 fxe4.

  58. 39...Nf6 Create pressure on d5

    Board fact: Black moves the knight from e4 to f6; from f6 it attacks White's pawn on d5.

    Fixed engine check: Ranked first · Nf6 Kc1 Nxd5 Rgg1.

  59. 40.Re1 Rook on the open e-file

    Board fact: White moves the rook from f1 to e1; the rook now occupies the open e-file; from there it controls e4, e5 and e3.

    Fixed engine check: Ranked first · Re1 Nxd5 Rgg1 Nxf4.

  60. 40...Nxd5 Exchange on d5

    Board fact: Black's knight takes the pawn on d5; from d5 it attacks White's pawn on f4; black is ahead by 4 conventional material points after the capture.

    Fixed engine check: Ranked first · Nxd5 Rgg1 Nxf4 Bb5.

  61. 41.Rf2 Improve the rook

    Board fact: White moves the rook from g2 to f2; from there it controls f3 and f4.

    Fixed engine check: Ranked first · Rf2 Rh4 Bb5 Nxf4.

  62. 41...Re3 Rook on the open e-file

    Board fact: Black moves the rook from h3 to e3; the rook now occupies the open e-file; from e3 it attacks White's rook on e1 and White's bishop on d3.

    Fixed engine check: Recorded move; Rh4 ranked higher · Re3 Rh1+ Kg7 Bc4.

  63. 42.Rg1 Rook on the open g-file

    Board fact: White moves the rook from e1 to g1; the rook now occupies the open g-file; from g1 it attacks Black's bishop on g6.

    Fixed engine check: Playable; Rh1+ ranked higher · Rg1 Rh3 Kc1 Rh4.

  64. 42...Re7 Rook on the open e-file

    Board fact: Black moves the rook from e3 to e7; the rook now occupies the open e-file; from there it controls e4, e5 and e3.

    Fixed engine check: Playable; Rh3 ranked higher · Re7 Kc1 Kg7 a3.

  65. 43.Kd2 Reposition the king

    Board fact: White moves the king from d1 to d2; from there it controls c3, d3 and e3.

    Fixed engine check: Ranked first · Kd2 Kg7 a3 Kh8.

  66. 43...Kg7 Reposition the king

    Board fact: Black moves the king from h6 to g7; from there it controls f6.

    Fixed engine check: Ranked first · Kg7 Rff1 Nf6 Bxf5.

  67. 44.Rf3 Improve the rook

    Board fact: White moves the rook from f2 to f3; from there it controls d3, e3 and f4.

    Fixed engine check: Near the leading choice · Rf3 a4 c4 bxc3+.

PGN

[Event "USA-ch"] [Site "?"] [Date "1957.??.??"] [White "Bernstein, Sidney Norman"] [Black "Fischer, Robert James"] [Result "0-1"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Be7 8. Qf3 Nbd7 9. O-O-O Qc7 10. g4 b5 11. Bg2 Bb7 12. Rhe1 b4 13. Nd5 exd5 14. exd5 Kf8 15. Nf5 Re8 16. Qe3 Bd8 17. Qd4 Bc8 18. Bh4 Nc5 19. Nxg7 Kxg7 20. g5 Bf5 21. gxf6+ Kh6 22. Qc4 Nd7 23. Qxc7 Bxc7 24. Bf3 Bd8 25. Bg5+ Kg6 26. Rg1 Bxf6 27. Bh4+ Kh6 28. Bxf6 Nxf6 29. Rg5 Be4 30. Rf1 Bg6 31. Rfg1 Re3 32. Bd1 Ne4 33. R5g2 f5 34. Be2 a5 35. h4 Rh3 36. h5 Bxh5 37. Bd3 Bg6 38. Rf1 Rf8 39. Kd1 Nf6 40. Re1 Nxd5 41. Rf2 Re3 42. Rg1 Re7 43. Kd2 Kg7 44. Rf3 0-1

Sources and checking

Score source: Chess Database, version 1 by Ana Schaigorodsky (2016), licensed under CC BY 4.0. LibreChess selected the exact score identified by sha256:d10970638fd1b81e2608b250251bc409a31ee6422bf089d73d3761281788dd4b and pins it in the selection manifest.
Exact Figshare tags:
White="Bernstein, Sidney Norman"; Black="Fischer, Robert James"; Event="USA-ch"; Date="1957.??.??"; Result="0-1". LibreChess parsed the main line with chess.js and stores normalised SAN. Source comments, side variations and termination detail were not retained.

LibreChess checks every SAN move with chess.js and compares the result and move sequence with a stored reference. The engine comparison was calculated offline from the fixed settings above; it is not a source for historical claims. No termination is inferred where the imported score does not preserve one.

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