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Alekhine vs Capablanca: Future Champions Meet

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Two future world champions meet in a 1913 exhibition game. Jose Raul Capablanca creates a cramping pawn on b3, then supports it with queen, bishop and rook until it can advance.

On this page
  1. Critical decisions
  2. Replay with move-by-move board facts
  3. PGN
  4. Sources and checking
  5. Continue with another game
White
Alexander Alekhine
Black
Jose Raul Capablanca
Event
St Petersburg exhibition
Year
1913
Result
0-1
Opening
C88 Ruy Lopez: Closed, Balla Variation

Opening reference: Ruy Lopez: Closed, Balla Variation (C88).

In this game, 20 half-moves are labelled opening, 64 middlegame and 0 endgame. The score contains 18 captures and 1 checks or mates; before a recorded move, the position offered a median of 35 legal choices. The source score ends after 42...b1=Q 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.

Critical decisions

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. 9...c5 — Advance the c-pawn9...c5 was a leading choice in the fixed engine check.
  2. 18...b3 — Moves 16-18 — ...Nc4 and ...b3!18...b3 was a leading choice in the fixed engine check.
  3. 21...Rxc1 — Moves 21-22 — trading into a better game21...Rxc1 was a leading choice in the fixed engine check.
  4. 33...Qc2 — Create pressure on c133...Qc2 was a leading choice in the fixed engine check.
  5. 42...b1=Q — Moves 34-42 — the b-pawn queens42...b1=Q 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.

♜♞♝♛♚♝♞♜♟♟♟♟♟♟♟♟♟♟♟♟♟♟♟♟♜♞♝♛♚♝♞♜
Alexander Alekhine vs Jose Raul Capablanca, 1913

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...Qc7

  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...e5 Claim central space

    Board fact: Black moves the pawn from e7 to e5; from there it controls d4 and f4.

    Fixed engine check: Ranked first · e5 Nf3 Nc6 d4.

  3. 2.Nf3 Develop the knight

    Board fact: White develops the knight from g1 to f3; from f3 it attacks Black's pawn on e5.

    Fixed engine check: Ranked first · Nf3 Nc6 d4 exd4.

  4. 2...Nc6 Develop the knight

    Board fact: Black develops the knight from b8 to c6; from there it controls d4 and e5.

    Fixed engine check: Ranked first · Nc6 d4 exd4 Nxd4.

  5. 3.Bb5 Develop the bishop

    Board fact: White develops the bishop from f1 to b5; from b5 it attacks Black's knight on c6.

    Fixed engine check: Ranked first · Bb5 a6.

  6. 3...a6 Create pressure on b5

    Board fact: Black moves the pawn from a7 to a6; from a6 it attacks White's bishop on b5.

    Fixed engine check: Ranked first · a6.

  7. 4.Ba4 Create pressure on c6

    Board fact: White moves the bishop from b5 to a4; from a4 it attacks Black's knight on c6.

    Fixed engine check: Ranked first · Ba4 Nf6.

  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 O-O Nxe4 d4.

  9. 5.O-O Kingside castling

    Board fact: White castles kingside, moving the king to g1 and the rook to f1. The move changes king safety and develops the rook in one turn.

    Fixed engine check: Ranked first · O-O Nxe4.

  10. 5...Be7 Develop the bishop

    Board fact: Black develops the bishop from f8 to e7; from there it controls c5, d6 and f6.

    Fixed engine check: Ranked first · Be7 d3 b5 Bb3.

  11. 6.Re1 Improve the rook

    Board fact: White moves the rook from f1 to e1; from there it controls e4 and e3.

    Fixed engine check: Ranked first · Re1.

  12. 6...b5 Create pressure on a4

    Board fact: Black moves the pawn from b7 to b5; from b5 it attacks White's bishop on a4.

    Fixed engine check: Ranked first · b5 Bb3.

  13. 7.Bb3 Create pressure on f7

    Board fact: White moves the bishop from a4 to b3; from b3 it attacks Black's pawn on f7.

    Fixed engine check: Ranked first · Bb3.

  14. 7...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 c3 O-O h3.

  15. 8.c3 Advance the c-pawn

    Board fact: White moves the pawn from c2 to c3; from there it controls d4.

    Fixed engine check: Ranked first · c3 O-O h3 Be6.

  16. 8...Na5 Create pressure on b3

    Board fact: Black moves the knight from c6 to a5; from a5 it attacks White's bishop on b3.

    Fixed engine check: Ranked first · Na5 Bc2 c5 d4.

  17. 9.Bc2 Reposition the bishop

    Board fact: White moves the bishop from b3 to c2; from there it controls e4 and d3.

    Fixed engine check: Ranked first · Bc2 c5 d4 Qc7.

  18. 9...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 h3.

  19. 10.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 and Black's pawn on e5.

    Fixed engine check: Ranked first · d4 cxd4 cxd4 Bg4.

  20. 10...Qc7 Reposition the queen

    Board fact: Black moves the queen from d8 to c7; from there it controls c5, c6 and d6.

    Fixed engine check: Near the leading choice · Qc7 d5 h6 b3.

Middlegame · 11.a4 to 42...b1=Q

  1. 11.a4 Create pressure on b5

    Board fact: White moves the pawn from a2 to a4; from a4 it attacks Black's pawn on b5.

    Fixed engine check: Near the leading choice · a4 b4 d5 O-O.

  2. 11...b4 Create pressure on c3

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

    Fixed engine check: Ranked first · b4 d5 Rb8 b3.

  3. 12.Nbd2 Develop the knight

    Board fact: White develops the knight from b1 to d2; from there it controls e4, c4 and f3.

    Fixed engine check: Ranked first · Nbd2 bxc3 bxc3 O-O.

  4. 12...O-O Kingside castling

    Board fact: Black castles kingside, moving the king to g8 and the rook to f8. The move changes king safety and develops the rook in one turn.

    Fixed engine check: Near the leading choice · O-O cxb4.

  5. 13.Nf1 Reroute the knight

    Board fact: White moves the knight from d2 to f1; from there it controls e3.

    Fixed engine check: Playable; cxb4 ranked higher · Nf1 cxd4.

  6. 13...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; from d4 it attacks White's pawn on c3; black is ahead by 1 conventional material point after the capture.

    Fixed engine check: Ranked first · cxd4 cxd4 Bg4 Ne3.

  7. 14.cxd4 Recapture on d4

    Board fact: White's pawn recaptures the pawn on d4; the move changes the central pawn contact; from d4 it attacks Black's pawn on e5; material is level after the capture.

    Fixed engine check: Ranked first · cxd4 Bg4.

  8. 14...Be6 Develop the bishop

    Board fact: Black develops the bishop from c8 to e6; from there it controls d5, c4 and f5.

    Fixed engine check: Recorded move; Bg4 ranked higher · Be6 h3.

  9. 15.Ne3 Develop the knight

    Board fact: White develops the knight from f1 to e3; from there it controls d5, c4 and f5.

    Fixed engine check: Ranked first · Ne3.

  10. 15...Rac8 Rook on the open c-file

    Board fact: Black moves the rook from a8 to c8; the rook now occupies the open c-file; from c8 it reinforces the queen on c7.

    Fixed engine check: Ranked first · Rac8 d5.

  11. 16.Bd2 Develop the bishop

    Board fact: White develops the bishop from c1 to d2; from d2 it attacks Black's pawn on b4.

    Fixed engine check: Near the leading choice · Bd2 Nc4.

    Moves 16-18 — ...Nc4 and ...b3!16...Nc4 prompts a knight exchange, after which Black's queen occupies c4. Then 18...b3 pushes White's bishop back to b1 and restricts the queenside pieces.
  12. 16...Nc4 Create pressure on d2

    Board fact: Black moves the knight from a5 to c4; from c4 it attacks White's bishop on d2 and White's knight on e3.

    Fixed engine check: Ranked first · Nc4 Rc1 Nxd2 Qxd2.

  13. 17.Nxc4 Exchange on c4

    Board fact: White's knight takes the knight on c4; from c4 it attacks Black's pawn on d6 and Black's pawn on e5; white is ahead by 3 conventional material points after the capture.

    Fixed engine check: Ranked first · Nxc4 Qxc4 Bb1 exd4.

  14. 17...Qxc4 Recapture on c4

    Board fact: Black's queen recaptures the knight on c4; from c4 it attacks White's bishop on c2 and White's pawn on d4; material is level after the capture.

    Fixed engine check: Ranked first · Qxc4 Bb1 Bg4 Be3.

  15. 18.Rc1 Rook on the open c-file

    Board fact: White moves the rook from a1 to c1; the rook now occupies the open c-file; from c1 it reinforces the queen on d1.

    Fixed engine check: Ranked first · Rc1 b3.

  16. 18...b3 Create pressure on c2

    Board fact: Black moves the pawn from b4 to b3; from b3 it attacks White's bishop on c2.

    Fixed engine check: Ranked first · b3 Bb1 Qxa4 Bc3.

  17. 19.Bb1 Reposition the bishop

    Board fact: White moves the bishop from c2 to b1; from there it controls e4 and d3.

    Fixed engine check: Ranked first · Bb1 Qxa4 Bc3 Bg4.

    Move 19 — ...Qxa4, winning a pawn19...Qxa4 takes the a4-pawn while the b3-pawn remains protected. White responds in the centre with 20.dxe5 and 21.Nxe5; Black answers by exchanging a pair of rooks on c1.
  18. 19...Qxa4 Exchange on a4

    Board fact: Black's queen takes the pawn on a4; from a4 it attacks White's pawn on d4; black is ahead by 1 conventional material point after the capture.

    Fixed engine check: Ranked first · Qxa4 Bc3 d5 exd5.

  19. 20.dxe5 Exchange on e5

    Board fact: White's pawn takes the pawn on e5; the move changes the central pawn contact; White accepts doubled pawns on the e-file; from e5 it attacks Black's knight on f6 and Black's pawn on d6; material is level after the capture.

    Fixed engine check: Ranked first · dxe5 Rxc1 Qxc1 Rc8.

  20. 20...dxe5 Recapture on e5

    Board fact: Black's pawn recaptures the pawn on e5; the move changes the central pawn contact; black is ahead by 1 conventional material point after the capture.

    Fixed engine check: Ranked first · dxe5 Rxc8 Rxc8 Nxe5.

  21. 21.Nxe5 Recapture on e5

    Board fact: White's knight recaptures the pawn on e5; from e5 it attacks Black's pawn on f7; material is level after the capture.

    Fixed engine check: Ranked first · Nxe5 Rxc1 Qxc1 Rc8.

    Moves 21-22 — trading into a better game21...Rxc1 22.Bxc1 exchanges Black's rook for White's active rook. The remaining queen and rook can support the b-pawn, while White's bishop is tied to the promotion diagonal.
  22. 21...Rxc1 Exchange on c1

    Board fact: Black's rook takes the rook on c1; the rook now occupies the open c-file; from c1 it attacks White's queen on d1 and White's bishop on b1; black is ahead by 5 conventional material points after the capture.

    Fixed engine check: Ranked first · Rxc1 Qxc1 Rc8 Qd1.

  23. 22.Bxc1 Recapture on c1

    Board fact: White's bishop recaptures the rook on c1; from c1 it reinforces the pawn on b2; material is level after the capture.

    Fixed engine check: Near the leading choice · Bxc1 Rd8 Qe2 h6.

  24. 22...Rd8 Rook on the open d-file

    Board fact: Black moves the rook from f8 to d8; the rook now occupies the open d-file; from d8 it attacks White's queen on d1.

    Fixed engine check: Ranked first · Rd8 Qe2 Nd7 Nf3.

  25. 23.Qe2 Create pressure on a6

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

    Fixed engine check: Ranked first · Qe2 Bb4 Rf1 Bd6.

  26. 23...h6 Advance the h-pawn

    Board fact: Black moves the pawn from h7 to h6.

    Fixed engine check: Ranked first · h6 Bd3.

  27. 24.h3 Advance the h-pawn

    Board fact: White moves the pawn from h2 to h3.

    Fixed engine check: Near the leading choice · h3 Nd7 Nxd7 Rxd7.

  28. 24...Bc5 Create pressure on f2

    Board fact: Black moves the bishop from e7 to c5; from c5 it attacks White's pawn on f2.

    Fixed engine check: Playable; a5 ranked higher · Bc5 Be3.

  29. 25.Bf4 Develop the bishop

    Board fact: White develops the bishop from c1 to f4; from f4 it attacks Black's pawn on h6.

    Fixed engine check: Ranked first · Bf4 a5 Rc1 Bd6.

  30. 25...Nd7 Create pressure on e5

    Board fact: Black moves the knight from f6 to d7; from d7 it attacks White's knight on e5.

    Fixed engine check: Ranked first · Nd7 Nxd7 Qxd7 Qxa6.

  31. 26.Rd1 Rook on the open d-file

    Board fact: White moves the rook from e1 to d1; the rook now occupies the open d-file; from d1 it attacks Black's knight on d7.

    Fixed engine check: Ranked first · Rd1 Be7 Nf3 a5.

  32. 26...Bb6 Create pressure on f2

    Board fact: Black moves the bishop from c5 to b6; from b6 it attacks White's pawn on f2.

    Fixed engine check: Near the leading choice · Bb6 Be3.

  33. 27.Nf3 Improve the knight

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

    Fixed engine check: Playable; Be3 ranked higher · Nf3 Nc5 Rxd8+ Bxd8.

  34. 27...Bc4 Create pressure on e2

    Board fact: Black moves the bishop from e6 to c4; from c4 it attacks White's queen on e2.

    Fixed engine check: Ranked first · Bc4 Qe1 Nf8 Rxd8.

  35. 28.Qe1 Reposition the queen

    Board fact: White moves the queen from e2 to e1; from there it controls e4, c3 and e3.

    Fixed engine check: Ranked first · Qe1.

  36. 28...Nc5 Create pressure on e4

    Board fact: Black moves the knight from d7 to c5; from c5 it attacks White's pawn on e4.

    Fixed engine check: Ranked first · Nc5 Rxd8+ Bxd8 Be3.

  37. 29.Bd6 Create pressure on c5

    Board fact: White moves the bishop from f4 to d6; from d6 it attacks Black's knight on c5.

    Fixed engine check: Playable; Rxd8+ ranked higher · Bd6 Qa5 Qxa5 Bxa5.

  38. 29...Nd3 Create pressure on e1

    Board fact: Black moves the knight from c5 to d3; from d3 it attacks White's queen on e1 and White's pawn on b2.

    Fixed engine check: Recorded move; Qa5 ranked higher · Nd3.

  39. 30.Bxd3 Exchange on d3

    Board fact: White's bishop takes the knight on d3; from d3 it attacks Black's bishop on c4; white is ahead by 3 conventional material points after the capture.

    Fixed engine check: Ranked first · Bxd3 Rxd6 Bxc4 Rxd1.

  40. 30...Rxd6 Exchange on d6

    Board fact: Black's rook takes the bishop on d6; the rook now occupies the open d-file; from d6 it attacks White's bishop on d3; material is level after the capture.

    Fixed engine check: Ranked first · Rxd6 Bxc4 Rxd1 Bxf7+.

  41. 31.Ra1 Rook on the semi-open a-file

    Board fact: White moves the rook from d1 to a1; the rook now works on a semi-open a-file; from a1 it attacks Black's queen on a4.

    Fixed engine check: Recorded move; Bxc4 ranked higher · Ra1 Qb5.

  42. 31...Qb5 Reposition the queen

    Board fact: Black moves the queen from a4 to b5; from there it controls d5, e5 and c4.

    Fixed engine check: Ranked first · Qb5 Bxc4 Qxc4 Rc1.

  43. 32.Bxc4 Exchange on c4

    Board fact: White's bishop takes the bishop on c4; from c4 it attacks Black's queen on b5 and Black's pawn on b3; white is ahead by 3 conventional material points after the capture.

    Fixed engine check: Ranked first · Bxc4 Qxc4.

  44. 32...Qxc4 Recapture on c4

    Board fact: Black's queen recaptures the bishop on c4; from c4 it attacks White's pawn on e4; material is level after the capture.

    Fixed engine check: Ranked first · Qxc4 e5.

  45. 33.Rc1 Rook on the open c-file

    Board fact: White moves the rook from a1 to c1; the rook now occupies the open c-file; from c1 it attacks Black's queen on c4.

    Fixed engine check: Playable; e5 ranked higher · Rc1 Qc2.

  46. 33...Qc2 Create pressure on c1

    Board fact: Black moves the queen from c4 to c2; from c2 it attacks White's rook on c1 and White's pawn on b2.

    Fixed engine check: Ranked first · Qc2 Kh1 Qxb2 e5.

  47. 34.Kh2 Reposition the king

    Board fact: White moves the king from g1 to h2; from h2 it reinforces the pawn on g2.

    Fixed engine check: Ranked first · Kh2 Qxb2 e5 Bxf2.

    Moves 34-42 — the b-pawn queensBlack collects b2 with 34...Qxb2, advances the passer with 39...b2 and promotes after 42...b1=Q. Those moves give the page's strategic claim a concrete sequence.
  48. 34...Qxb2 Exchange on b2

    Board fact: Black's queen takes the pawn on b2; from b2 it attacks White's rook on c1 and White's pawn on f2; black is ahead by 1 conventional material point after the capture.

    Fixed engine check: Ranked first · Qxb2 e5 Bxf2 Rc8+.

  49. 35.e5 Create pressure on d6

    Board fact: White moves the pawn from e4 to e5; from e5 it attacks Black's rook on d6.

    Fixed engine check: Ranked first · e5 Bxf2 Rc8+ Kh7.

  50. 35...Bxf2 Exchange on f2

    Board fact: Black's bishop takes the pawn on f2; from f2 it attacks White's queen on e1; black is ahead by 2 conventional material points after the capture.

    Fixed engine check: Ranked first · Bxf2 exd6 Bxe1 Rxe1.

  51. 36.Qf1 Create pressure on f2

    Board fact: White moves the queen from e1 to f1; from f1 it attacks Black's bishop on f2 and Black's pawn on a6.

    Fixed engine check: Ranked first · Qf1.

  52. 36...Rg6 Create pressure on g2

    Board fact: Black moves the rook from d6 to g6; from g6 it attacks White's pawn on g2.

    Fixed engine check: Ranked first · Rg6 Rc8+ Kh7 h4.

  53. 37.Rc8+ A forcing check

    Board fact: White moves the rook from c1 to c8; the move checks Black's king; the rook now occupies the open c-file; from there it controls c3, c4 and c5.

    Fixed engine check: Near the leading choice · Rc8+ Kh7 h4 Bg3+.

  54. 37...Kh7 Answering the check

    Board fact: Black answers the check by moving the king from g8 to h7; from h7 it reinforces the rook on g6.

    Fixed engine check: Ranked first · Kh7 h4 Bg3+ Kg1.

  55. 38.Rf8 Rook on the semi-open f-file

    Board fact: White moves the rook from c8 to f8; the rook now works on a semi-open f-file; from f8 it attacks Black's pawn on f7.

    Fixed engine check: Playable; e6 ranked higher · Rf8 Qc2 e6 Bg3+.

  56. 38...Qc2 Reposition the queen

    Board fact: Black moves the queen from b2 to c2; from there it controls e4, c3 and c4.

    Fixed engine check: Near the leading choice · Qc2 e6 Rxe6 Ng5+.

  57. 39.Rxf7 Exchange on f7

    Board fact: White's rook takes the pawn on f7; the rook now occupies the open f-file; from f7 it attacks Black's pawn on g7; black is ahead by 1 conventional material point after the capture.

    Fixed engine check: Near the leading choice · Rxf7 Bg3+ Kh1 b2.

  58. 39...b2 Advance a passed pawn

    Board fact: Black moves the pawn from b3 to b2; the pawn is now passed.

    Fixed engine check: Ranked first · b2 Rb7 Bg3+ Kh1.

  59. 40.Rb7 Rook on the semi-open b-file

    Board fact: White moves the rook from f7 to b7; the rook now works on a semi-open b-file; from b7 it attacks Black's pawn on b2 and Black's pawn on g7.

    Fixed engine check: Ranked first · Rb7 Bg3+ Kg1 Qc5+.

  60. 40...Bb6 Reposition the bishop

    Board fact: Black moves the bishop from f2 to b6; from there it controls d4, c5 and e3.

    Fixed engine check: Ranked first · Bb6.

  61. 41.Nd2 Reroute the knight

    Board fact: White moves the knight from f3 to d2; from there it controls e4, c4 and f3.

    Fixed engine check: Near the leading choice · Nd2 Qxd2 e6 b1=Q.

  62. 41...Qxd2 Exchange on d2

    Board fact: Black's queen takes the knight on d2; from d2 it attacks White's pawn on g2; black is ahead by 4 conventional material points after the capture.

    Fixed engine check: Ranked first · Qxd2 Rxg7+ Kxg7 Qf3.

  63. 42.e6 Advance a passed pawn

    Board fact: White moves the pawn from e5 to e6; the pawn is now passed.

    Fixed engine check: Recorded move; Rxg7+ ranked higher · e6 b1=Q Rxg7+ Kxg7.

  64. 42...b1=Q Promotion on b1

    Board fact: Black's pawn reaches b1 and promotes to a queen; the pawn is now passed; from b1 it attacks White's queen on f1.

    Fixed engine check: Ranked first · b1=Q Rxg7+ Kxg7 Qf7+.

PGN

[Event "St Petersburg exhibition"] [Site "?"] [Date "1913.??.??"] [White "Alekhine, Alexander"] [Black "Capablanca, Jose Raul"] [Result "0-1"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 Na5 9. Bc2 c5 10. d4 Qc7 11. a4 b4 12. Nbd2 O-O 13. Nf1 cxd4 14. cxd4 Be6 15. Ne3 Rac8 16. Bd2 Nc4 17. Nxc4 Qxc4 18. Rc1 b3 19. Bb1 Qxa4 20. dxe5 dxe5 21. Nxe5 Rxc1 22. Bxc1 Rd8 23. Qe2 h6 24. h3 Bc5 25. Bf4 Nd7 26. Rd1 Bb6 27. Nf3 Bc4 28. Qe1 Nc5 29. Bd6 Nd3 30. Bxd3 Rxd6 31. Ra1 Qb5 32. Bxc4 Qxc4 33. Rc1 Qc2 34. Kh2 Qxb2 35. e5 Bxf2 36. Qf1 Rg6 37. Rc8+ Kh7 38. Rf8 Qc2 39. Rxf7 b2 40. Rb7 Bb6 41. Nd2 Qxd2 42. e6 b1=Q 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:d9f4a375a010228d28fbd9cc8a85e4ec6aea6542470ace9c94489d67b38c59e4 and pins it in the selection manifest.
Exact Figshare tags:
White="Alekhine, Alexander"; Black="Capablanca, Jose Raul"; Event="St Petersburg exhibition"; Date="1913.??.??"; 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 or a substitute for the authored notes. No termination is inferred where the imported score does not preserve one.

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