Author: Uri Blass
Date: 03:43:59 07/14/03
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On July 14, 2003 at 05:58:29, Ryan B. wrote: >I don't think this is a mate in 13 situation. I would be impressed with an >engine declaring mate in under an hour in this position. Just finding Nf6 is a >big challenge for most programs. It took my program almost an hour to find Nf6. > Amy, Crafty, and Sjeng all needed 30 min or more to find Nf6 on my G4 450. No >program I analyzed with was able to declare mate in #. It is clear that Tony was joking. Movei was unable to find Nf6+ in an hour on p850(it showed more than+1 for Qa4) After Nf6+ gxf6 it shows a clear positional advantage for white after some minutes but only +0.41 at depth 11,+0.88 at depth 12 and +1.05 at depth 13(that is still less than the score for Qa4) so I guess that the problem is bad king safety evaluation and lack of threat mate in 1 extensions(Qf8 threats mate after Nf6+ gxf6 Rd8+ Kh7 Qf8 or Nf6+ gxf6 Rd8+ Rxd8 Rxd8 Kh7 Qf8). For the question I remember that 2/13 means brute force depth of 2 when 13 is the minimal depth of extensions. search with null move pruning is not considered by chessmaster as brute force depth. Uri
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