Computer Chess Club Archives


Search

Terms

Messages

Subject: a couple of hard positions (material gain that disappears)

Author: Jon Dart

Date: 07:22:52 06/12/01


Here are a couple of positions from recent Arasan games:

[D] 1n2r3/5Nk1/p4b2/2Qp3p/6p1/P5P1/P1B1q1PP/6RK b - -

Here taking the piece with Kxf7 is fatal. It appears
however that after Be7! Black doesn't have anything better
than a draw.

This one is an opening trap sprung by the program
"Postmodernist":

[D] rn1qk1nr/ppp3pp/5p2/2bP1bB1/3p4/1Q3N2/PP2PPPP/RN2KB1R w KQkq -

Most programs will play Qxb7, but this loses material as the
Queen can be trapped. There isn't really a good move here -
White's mistake was earlier in the game, and he's already
worse. Crafty eventually selects Bf4 (at ply 12)
with a minus score.

This is another example where grabbing material is the
wrong choice. A human might well avoid Qxb7 on the general
rule that Queen sorties in the opening are a bad idea,
but most computers won't weight that factor heavily
enough and must discover the badness of Qxb7 by search.




This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.