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Subject: Are EGTBs worth it? (another example)

Author: Mike Hood

Date: 15:15:03 01/25/04


This isn't a constructed position. It cropped up in a small engine tournament
that I was running today. White was Fritz 5.32, Black was Junior 7. I have all
the 5-piece EGTBs on my PC, but Fritz doesn't use them.

[D] 8/8/7Q/8/3K2p1/q5p1/6kP/8 w - - 0 75

It looks bad for White, although if I had this position on the board I might try
for a draw by playing Qd2+. In the tournament Fritz 5.32 was playing White, and
played hxg3, which it evaluated at -1.87. A typical blunder for a program that
doesn't use EGTB probing. Junior 7 immediately recognized that the resulting
position was a Mate in 65.

Other non-probing engines make the same mistake. List 5.04 plays hxg3,
evaluating it at -2.80. Goliath Light also plays hxg3 (-2.00). Are there any
non-probing engines that avoid this move?



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