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Subject: Interesting CST position

Author: Enrique Irazoqui

Date: 05:43:49 06/27/00


Thorsten posted an interesting position in
http://www.oxford-softworks.com/cgi-bin/forums/mschess/558.html:

[D]2R5/4k1pp/p3p3/4P1p1/p3N3/q1P4P/2P1P1P1/1K6 w - -; bm e4d6;

Thorsten's comments:

"Here how CSTal2.03 plays on my k6-3/400:

1. d9 8"
2. d12 105"
3. d14 475" >1.17
4. d14 615" +4.24 e4d6 g7g6 e2e3 h7h6 e3e4 g5g4 h3g4 h6h5 g4h5 g6h5 g2g3

1.After 8 seconds for the first time the key-move , than changed into another.

2.After 105 seconds it has the Nd6 again in depth 12.

3.After 475 seconds it gets a fail high to >1.17.

4.After 615 it knows HOW high and says +4.24 with the main-line shown above."

Aside from CST 2.03, only Genius 6.5 (and older versions, I guess) finds the
right line in less than 5 minutes and fails high. Shredder 4 and SOS pick Nd6,
but with a wrong line and a 0.00 evaluation. Tiger, Fritz, Junior, Hiarcs,
Nimzo, Rebel, AnMon, Crafty, CM6K, don't see that the black queen is trapped and
white can zugzwang black.

Enrique



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