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Edward Lasker vs Thomas, 1912

Edward Lasker (not Emanuel) sacrifices the queen on h7 and walks Thomas’s king from h7 to g1. Castling queenside is the mating move.

White
Edward Lasker
Black
George Thomas
Event
London
Year
1912
Result
1-0

Critical position

Edward Lasker vs Thomas, 1912, after ply 34♜♞♜♟♝♟♟♛♟♟♟♘♙♘♙♙♙♙♙♗♙♖♖♔♚abcdefgh12345678

After 17... Kg1. White to move.

Take over as White vs Maia

Step through

Position after 17... Kg1♜♞♜♟♝♟♟♛♟♟♟♘♙♘♙♙♙♙♙♗♙♖♖♔♚abcdefgh12345678

17... Kg1

Annotated score

  1. 1. d4 (best) e6 (excellent)

  2. 2. Nf3 (good) f5 (inaccuracy)

  3. 3. Nc3 (good) Nf6 (best)

  4. 4. Bg5 (excellent) Be7 (excellent)

  5. 5. Bxf6 (best) Bxf6 (best)

  6. 6. e4 (best) fxe4 (good)

  7. 7. Nxe4 (best) b6 (good)

  8. 8. Ne5 (good) O-O (best)

  9. 9. Bd3 (inaccuracy) Bb7 (mistake)

  10. 10. Qh5 (best) Qe7 (mistake)

  11. 11. Qxh7+ (best) Kxh7 (best)

    Qxh7+: 11.Qxh7+ is the start. The king has to take.

  12. 12. Nxf6+ (best) Kh6 (best)

  13. 13. Neg4+ (best) Kg5 (best)

  14. 14. h4+ (best) Kf4 (best)

    h4+: 14.h4+ and 15.g3+ drive the king into White’s camp.

  15. 15. g3+ (best) Kf3 (best)

  16. 16. Be2+ (best) Kg2 (best)

  17. 17. Rh2+ (best) Kg1 (best)

  18. 18. O-O-O# (best)

    O-O-O#: 18.O-O-O# mates by discovered check. The king has walked to g1.