Author: Eelco de Groot
Date: 22:15:26 07/20/05
This is from the latest game Pro Deo 1.1 Vulcan {9i9k} versus Gandalf.
Everything seemed still more or less under control by Vulcan, but investing
material here, playing 30.Nxg6? in the vague hope that one or two of its
centerpawns might make it to the touchdown-line was asking to much of the
position.
White is not really better, probably a bit worse, and the position has to be
treated with extreme caution. Lesson for Vulcan for today: Don't exchange pieces
when down! Don't exchange and especially don't sacrifice pieces yet when there
is no clear advantage in sight! Be careful in sacrificing any pieces when the
score is a bit plus, but is falling. Don't sac light or heavy pieces in a
difficult ending, without being able to (or in this case not even taking the
time to) calculate the resulting positions deeply enough, at least as deeply as
possible under the given timeconstraints.
[D]7r/1kpr1p2/1p4p1/p6n/3pPP1N/3P1K2/PP1R3P/6R1 w - - 2 1
But what move to play then? I don't really know what is better. Gandalf expected
30.f5 Nf6 31.Kg3 g5 32.Nf3 g4 33.Ng5 Rh5 34.Kf4 Rh4 35.Kg3 Rh5. in the game.
Pro Deo 1.1 Default maybe does a bit better by playing 30.f5, but as in the main
line the following move is still 31.Nxg6 I can't give it more than a B minus for
effort. This main line would only be a transposition of the moves in the game.
00:00:00.2 0,26 2 222 Nxg6 fxg6 Rxg6 c6
00:00:00.2 0,47 3 883 Nxg6 fxg6 Rxg6 c6 Re2
00:00:00.2 0,28 4 4027 Nxg6 fxg6 Rxg6 Rf7 f5 Re7
00:00:00.2 0,43 5 14669 Nxg6 fxg6 Rxg6 Rf8 f5 Re7
00:00:00.3 0,34 6 40080 Nxg6 fxg6 Rxg6 Rf7 f5 Re7 Re2 c6
00:00:00.3 0,47 6 60727 f5 Ng7 Nxg6 fxg6 Rxg6 Re7 Kg4
00:00:00.4 0,62 7 124485 f5 Nf6 Nxg6 fxg6 Rxg6 Rh3+ Kf4 Rh4+ Ke5 Ne8
00:00:00.5 0,52 8 238564 f5 Nf6 Nxg6 fxg6 Rxg6 Rh3+ Kf4 Rh4+ Kg5 Nxe4+ dxe4 Rxe4
h4
00:00:00.8 0,52 9 621934 f5 Ng7 Nxg6 fxg6 Rxg6 c5 Kg4 Ne8 e5 Rdh7 Rf2 Rxh2
00:00:01.6 0,45 10 1611664 f5 Nf6 Nxg6 fxg6 Rxg6 Rf7 Re2 Nd7 Kf4 Re7 Rf2
00:00:03.1 0,25 11 3595798 f5 Nf6 Nxg6 fxg6 Rxg6 Rf7 Kf4 Nd7 Rdg2 Re7 R6g3 Rh4+
Rg4 Rh3 R4g3 Rh4+ Rg4 Rh3 R4g3
00:00:07.1 0,23 12 8907379 f5 Nf6 Nxg6 fxg6 Rxg6 Rf7 Kf4 Nd7 Re2 Re7 e5 Rh4+ Kg5
Nxe5 Rxe5 Rxe5
00:00:16.4 0,08 13 21219194 f5 Nf6 Nxg6 fxg6 Rxg6 Rf7 Kf4 Nd7 Rdg2 Re7 Rg7 Rh4+
R2g4 Rxg7 Rxh4 c6
00:01:01.7 0,07 14 79889931 f5 Nf6 Nxg6 fxg6 Rxg6 Rf7 Kf4 Rh4+ Ke5 Ng4+ Ke6 Rh8
Kxf7 Ne5+ Ke6 Re8+ Kd5 Nf3
00:01:06.5 0,07 14 86775202 Nxg6
00:01:19.1 0,07 14 79889931 f5 Nf6 Nxg6 fxg6 Rxg6 Rf7 Kf4 Rh4+ Ke5 Ng4+ Ke6 Rh8
Kxf7 Ne5+ Ke6 Re8+ Kd5 Nf3
00:03:09.6 0,07 15 249745319 f5 Nf6 Nxg6 fxg6 Rxg6 Rf7 Rdg2
00:07:54.6 0,00 16 634419156 f5 Nf6 Nxg6 fxg6 fxg6 Rh3+ Kf4 Nh7
00:35:52.4 0,00 17 2840425533 f5 Nf6 Nxg6 fxg6 Rxg6 Re7 Rxf6 Rh4
After 30.Nxg6? White quickly lost ground and could have capitulated before move
49 when the game ended.
after 49.Kf3
[D]4r3/2R1P3/1p3k2/2n5/1p6/3p1K2/P7/8 b - - 1 1
Gandalf started calculating now very long and deep to make sure nothing could go
wrong after taking the pawn with 49..Rxe7, but finally concluded that a score of
-28.67 pawns for White was safe enough to risk it.. This was also far below the
score treshold of course, so here this game was ended.
[Event "Tournament test Vulcan {9k9i}"]
[Site "Groningen"]
[Date "2005.07.19"]
[Round "1.2"]
[White "Pro Deo 1.1 - Vulcan {9k9i}"]
[Black "Gandalf 6.01"]
[ECO "C68"]
[Result "0-1"]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. d4 exd4
6. Qxd4 Qxd4 7. Nxd4 Nf6 8. f3 c5 9. Ne2 Bd7 10. O-O O-O-O
11. Nbc3 Be6 12. Be3 Bd6 13. Rad1 Rd7 14. Nf4 Bc4 15. Nd3
Bxd3 16. cxd3 Rhd8 17. Rd2 b6 18. Rfd1 h6 19. Ne2 Nh5
20. g4 Nf6 21. Kg2 a5 22. Ng3 Be5 23. Nf5 Kb7 24. f4 Bd4
25. Bxd4 cxd4 26. Kf3 h5 27. gxh5 Nxh5 28. Rg1 g6 29. Nh4
Rh8 30. Nxg6 fxg6 31. Rxg6 Rf7 32. f5 Nf6 33. Kf4 Nd7
34. Rdg2 Rfh7 35. e5 Nc5 36. R6g3 Kc6 37. b4 axb4 38. h3
Rxh3 39. Rxh3 Rxh3 40. e6 Kd6 41. Rg8 Nxd3+ 42. Kg4 Rh7
43. Rd8+ Ke5 44. Rd7 Rh8 45. e7 Re8 46. Rxc7 Nc5 47. f6
Kxf6 48. Kg3 d3 49. Kf3 Rxe7 0-1
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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