Author: Olaf Jenkner
Date: 08:36:44 03/09/02
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>>After 4,5 hours (PII 333MHz, 88 MB hash) Gustav says "no mate in 16". >>It is possible to reach mate in 19 with brute force >> >>OJe > >If this is really "brute force", i.e. with unrestricted white moves, >then Gustav shows a very impressive performance, here. >It still extrapolates to 25 days, but that appears to be much more accessible. > >Do you do any special "tricks" or heuristics to speed up positions >like this one? > >Cheers, >Heiner This is really "brute force", i.e. with unrestricted white moves. The program must avoid that the black rook leaves the 8th rank. I.E. 1.Kf4 Rb8 2.Ke5 Rb5+ 3.Ke4 Rb4?? 4.feQ! Perhaps Chest gives white the opportunity to promote. Gustav can not avoid this every time but mostly. OJe
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