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Subject: Re: Interesting test position

Author: Moritz Berger

Date: 04:42:39 01/19/98

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On January 19, 1998 at 00:05:42, Robert Hyatt wrote:

>Here's an interesting test position.  This happened in a game on ICC
>tonite between Crafty and a human player (actually Halcion running
>Crafty if you try to find the game.)
>
>In this position, Bxe7 seems pretty natural, tactically.  See if your
>program can find out in time that it is bad.  This was a blitz game
>and Crafty didn't.  Bxe7 fails to Nc4, although Crafty sees the entire
>line almost instantly, there is a tiny flaw at the end that makes this
>fall apart completely.
>
>here's the fen:
>
>2r3k/ppq1ppbp/3nb1p1/4p1B1/6P1/1NP2P2/PP1Q3P/K2R3R w - -
>
>to avoid losing this game, you'd have to play this in 10 seconds or
>so, as it was a 5 0 game I believe...  I certainly can't do it...

Fritz 5 (P233 MMX):

also likes Bxe7 ... until
14s: Rhe1 -0.06 10/27
25s: Rhe1 0.19 10/20
48s: h4 0.22 10/30
139s: h4 0.03 11/36
153s: Rhe1 0.13 11/36

Hiarcs 6/Fritz engine (P233 MMX):

h4 after 1s, never considers Bxe7
Qf2 after 141s (Qf2 a5 h4 b5 h5 a4 h6 axb3 hxg7 Kxg7) += 0.65

Junior 4.6beta (P233 MMX):

2s: Bxe7
8s: Bxe7 += 0.81 12 semiply
22s: Bxe7 += 0.81 13 semiply
114s: Bxe7 += 0.00 14 semiply Bxe7 Nc4 Qd8+ Rd8+ Bf8 Rxf8+ Kg7 Re8 Qc6
Bf8+ Kf6 Nc5 Qxf3
210s: h4 += 0.60 14 semiply h4 a5 Nc1 f6 Be3 Qc6 Rhf1 b5 Nd3



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