Author: Ernst A. Heinz
Date: 12:26:10 05/22/98
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On May 22, 1998 at 13:33:59, Christophe Theron wrote: >>One of my very favorite positions is the Badai problem I posted last >>Summer: >>8/1p6/p4p1p/2p1P2k/5P2/6pP/1P4P1/6K1 w - - 0 0 >> >>White to play 1.f5 >> >>How is Tiger doing with this one? >> >>Enrique > >Tiger running on K5-100MHz, 32Mb hash, finds 1.f5 in 293.85s (4:54) at >ply 17 (it would find it in 147s = 2:27 on K6-200). > >From ply 1 to ply 16, Tiger would play 1.e6. But the score of this move >slowly decreases at each iteration. > >At ply 17, in 57.56s, e6 is evaluated at -0.08. > >Then Tiger chooses f5, with a fail high. In 293.85s, f5 is evaluated at >+0.88 with the PV: >1. f5 fxe5 2. h4 b5 3. Kf1 e4 4. Ke2 c4 5. Ke3 b4 ... > >At ply 18, in 893.75s (14:54), a fail high is detected for f5. > >Then in 1260S (21:00), f5 is evaluated +5.62 with the same PV. > >I let it run till ply 19, and the same move with the same score and PV >would be played. > >How did the other programs on this position? > > Christophe "DarkThought" locks onto 1. f5! in iteration #16 after 1:24 min on a 600MHz Alpha-21164a. =Ernst=
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