Author: Dan Ellwein
Date: 14:24:04 07/21/05
Go up one level in this thread
On July 21, 2005 at 01:15:26, Eelco de Groot wrote:
>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
P3/850
Time Depth Score Positions Moves
1:39:14 7/14 -0.17 390113853 1.f5 Nf6 2.Kg3 g5 3.Nf3 g4 4.Ne5
Re7 5.Nc4 Ka6 6.e5 Nh5+ 7.Kg2 b5
8.f6
58:11 7/14 -0.29 213366895 1.Ng2 c5 2.Rc1 Nf6 3.h4 Ne8 4.Kg3
Nd6 5.f5 c4 6.Kf4 b5 7.fxg6 fxg6
8.Rcd1 cxd3 9.Rxd3
2:48:33 7/14 -0.82 666963420 1.Re1 Nxf4 2.Kxf4 Rxh4+ 3.Kg3 Rh5
4.Rf2 Re5 5.Ref1 Ree7 6.Rf6 c5
7.a4 Ka6 8.h4 Rb7
Dan
>
>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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