Author: Steffen Jakob
Date: 06:35:10 05/26/99
Go up one level in this thread
On May 26, 1999 at 08:42:07, eric guttenberg wrote:
>This is an interesting trap from a real gm game (Chandler-Z. Polgar, 1987):
>
>White K on e6 B on e4 P's on g5 and h2
>Black K on g7 N on g8
>Black to move
>
>In this losing position Black played 1...N-h6; White played 2.gxh6ch?? and
>was forced to accept the draw after Black played 2...K-h8!
>
>My hiarcs 6, playing white after 1...N-h6, ignores 2. gxh6ch and instead
>immediately selects and stays with 2.h4 which wins. So does CM6000.
>Genius 5 initially falls into the trap but after about 2 minutes on my
>celeron 333 sees a problem with that move and at 3:36 selects 2.h4.
>Fritz 5.32 doesn't have a clue and plays 2. gxh6 and even several moves
>later thinks he's 9plus points ahead in his evaluation.
Here is the evaluation of "Hossa". Hossa knows about these kind of positions
even when there are multiple pawns in the a/h-file (2... Kxh6 is a mate in 18).
I am very surprised that Genius doesnt evaluate this endgame correctly.
+---+---+---+---+---+---+---+---+
8 | | | | | | | | |
+---+---+---+---+---+---+---+---+ Black: Hossa v1.54 (C) (0)
7 | | | | | | ||K|| |
+---+---+---+---+---+---+---+---+ Black material: 3.3
6 | | | | | K | | ||N||
+---+---+---+---+---+---+---+---+
5 | | | | | | | P | |
+---+---+---+---+---+---+---+---+ White to move
4 | | | | | B | | | |
+---+---+---+---+---+---+---+---+ 8/6k1/4K2n/6P1/4B3/8/7P/8 w
3 | | | | | | | | |
+---+---+---+---+---+---+---+---+ White material: 5.31
2 | | | | | | | | P |
+---+---+---+---+---+---+---+---+ White: opponent (0)
1 | | | | | | | | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
FEN: 8/6k1/4K2n/6P1/4B3/8/7P/8 w
Avoid Move : gxh6
Position ID: "Guttenbergs position"
1 9.91 0.00 2 1.g6
<1> 9.91 0.10 24 1.g6
2 9.75 0.11 33 1.g6 h6f5
<2> 9.75 0.14 109 1.g6 h6f5
3 9.84 0.16 177 1.g6 h6g4 2.h3
<3> 9.84 0.20 700 1.g6 h6g4 2.h3
4 9.83 0.21 844 1.g6 h6g4 2.h4 g4e3
<4> 9.83 0.41 2935 1.g6 h6g4 2.h4 g4e3
5 9.93 0.43 3475 1.g6 h6g4 2.h4 g4f6 3.e4f5
<5> 9.93 0.63 9000 1.g6 h6g4 2.h4 g4f6 3.e4f5
6 9.78 0.64 9953 1.g6 h6g4 2.h4 g4f6 3.e4f5 f6e4
<6> 9.78 1.02 24158 1.g6 h6g4 2.h4 g4f6 3.e4f5 f6e4
7 9.56 1.13 28354 1.g6 h6g4 2.h4 g7h6 3.e4f5 h6h5
4.g7
<7> 9.56 2.86 96863 1.g6 h6g4 2.h4 g7h6 3.e4f5 h6h5
4.g7
? 8 9.65 5.73 278722 1.g6 h6g4
? <8> 9.65 5.81 278743 1.g6 h6g4
9 9.39 6.30 300851 1.g6 h6g4 2.h4 g4f6 3.e4f5 f6h5
4.e6e5 h5g3 5.f5d3
3/9 9.79 8.63 401902 1.h4 h6f7 2.e6e7 g7h8 3.e7f6 f7h6
4.g6 h6g4 5.f6e6 h8g7
<9> 9.79 14.00 596957 1.h4 h6f7 2.e6e7 g7h8 3.e7f6 f7h6
4.g6 h6g4 5.f6e6 h8g7
10 9.77 18.14 802699 1.h4 h6f7 2.g6 f7d8 3.e6f5 d8f7
4.h5 f7d6 5.f5f4 g7h6 6.e4f3 d6e4
<10> 9.77 28.55 1341605 1.h4 h6f7 2.g6 f7d8 3.e6f5 d8f7
4.h5 f7d6 5.f5f4 g7h6 6.e4f3 d6e4
11 9.75 46.64 1971157 1.h4 h6f7 2.g6 f7d8 3.e6f5 d8f7
4.h5 f7d6 5.f5e5 d6f7 6.e5d5 f7g5
7.e4f5 g5e4
<11> 9.75 1:28 3774709 1.h4 h6f7 2.g6 f7d8 3.e6f5 d8f7
4.h5 f7d6 5.f5e5 d6f7 6.e5d5 f7g5
7.e4f5 g5e4
12 9.61 2:17 5237197 1.h4 h6f7 2.g6 f7d8 3.e6d7 d8f7
4.h5 g7f6 5.d7e8 f7d6 6.e8f8 d6xe4
7.g7 f6g5 8.g7g8Q g5f4
<12> 9.61 3:28 8139456 1.h4 h6f7 2.g6 f7d8 3.e6d7 d8f7
4.h5 g7f6 5.d7e8 f7d6 6.e8f8 d6xe4
7.g7 f6g5 8.g7g8Q g5f4
Best wishes,
Steffen.
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