Deep Fritz 10 vs. Vladimir Kramnik, 2006

Deep Fritz 10 vs. Vladimir Kramnik, 2006
The final position after 35. Qh7# Open this game on lichess
White	Deep Fritz 10
Black	Vladimir Kramnik
Result	1–0
Date	27 November 2006
Event	Man vs Machine
Round	2
Site	Bonn GER
Opening	D10
Moves	35
Analysis	Stockfish 19, depth 22
Critical moments	1, 2

Deep Fritz 10 vs. Vladimir Kramnik is a chess game played on 27 November 2006 at Bonn GER, in round 2 of “Man vs Machine”. Deep Fritz 10, with the white pieces, won by checkmate in 35 moves. The opening is classified as ECO D10. The engine found two critical moments, where a single move cost at least 20 points of winning chances or changed the expected result; each is a “what would you play?” question below.

The game

1. d4 d5 2. c4 dxc4 3. e4 b5 4. a4 c6 5. Nc3 b4 6. Na2 Nf6 7. e5 Nd5 8. Bxc4 e6 9. Nf3 a5 10. Bg5 Qb6 11. Nc1 Ba6 12. Qe2 h6 13. Be3 Bxc4 14. Qxc4 Nd7 15. Nb3 Be7 16. Rc1 O-O 17. O-O Rfc8 18. Qe2 c5 19. Nfd2 Qc6 20. Qh5 Qxa4 21. Nxc5 Nxc5 22. dxc5 Nxe3 23. fxe3 Bxc5 24. Qxf7+ Kh8 25. Qf3 Rf8 26. Qe4 Qd7 27. Nb3 Bb6 28. Rfd1 Qf7 29. Rf1 Qa7 30. Rxf8+ Rxf8 31. Nd4

Critical moment 1. After 31. Nd4, Black to move. What would you play?

Show the answer

Best was 31... Rd8, the engine's line being 31... Rd8 32. Rc4 b3 33. Ra4 Qd7 34. Rc4 a4 35. h4 ∓. With it, Black's winning chances stay at 68%.

In the game Black played 31... a4?!, an inaccuracy that turned a winning game into a level one. Black's winning chances fell from 68% to 54%. The refutation: 32. Nxe6 Bxe3+ 33. Kh1 Rb8 34. Rf1 Qa6 35. Ra1 a3 =.

Analyze this position on lichess

31... a4?! (An inaccuracy that turned a winning game into a level one: Black's winning chances fall from 68% to 54%.) 32. Nxe6 Bxe3+ 33. Kh1 Bxc1 34. Nxf8

Critical moment 2. After 34. Nxf8, Black to move. What would you play?

Show the answer

Best was 34... Kg8, the engine's line being 34... Kg8 35. Ng6 Bxb2 36. e6 Qf2 37. Qa8+ Kh7 38. Nf8+ =. With it, Black's winning chances stay at 50%.

In the game Black played 34... Qe3??, a blunder that turned a level game into a losing one: it allows mate in 1. Black's winning chances fell from 50% to 0%. The refutation: 35. Qh7# +−.

Analyze this position on lichess

34... Qe3?? (A blunder that turned a level game into a losing one: it allows mate in 1; Black's winning chances fall from 50% to 0%.) 35. Qh7# 1–0

Conclusion

Deep Fritz 10 delivered checkmate with 35. Qh7#. In the engine's grading, White made none, and Black made one inaccuracy and one blunder.

PGN

[Event "Man vs Machine"]
[Site "Bonn GER"]
[Date "2006.11.27"]
[Round "2"]
[White "Deep Fritz 10"]
[Black "Vladimir Kramnik"]
[Result "1-0"]
[ECO "D10"]
[PostmortemId "5e65903b8b"]

1. d4 d5 2. c4 dxc4 3. e4 b5 4. a4 c6 5. Nc3 b4 6. Na2 Nf6 7. e5 Nd5 8. Bxc4 e6
9. Nf3 a5 10. Bg5 Qb6 11. Nc1 Ba6 12. Qe2 h6 13. Be3 Bxc4 14. Qxc4 Nd7 15. Nb3
Be7 16. Rc1 O-O 17. O-O Rfc8 18. Qe2 c5 19. Nfd2 Qc6 20. Qh5 Qxa4 21. Nxc5 Nxc5
22. dxc5 Nxe3 23. fxe3 Bxc5 24. Qxf7+ Kh8 25. Qf3 Rf8 26. Qe4 Qd7 27. Nb3 Bb6
28. Rfd1 Qf7 29. Rf1 Qa7 30. Rxf8+ Rxf8 31. Nd4 a4 32. Nxe6 Bxe3+ 33. Kh1 Bxc1
34. Nxf8 Qe3 35. Qh7# 1-0