Author: Dave Gomboc
Date: 02:07:58 05/23/99
Go up one level in this thread
On May 23, 1999 at 01:52:34, Paul Richards wrote: >On May 22, 1999 at 21:19:11, Robert Hyatt wrote: > >>On May 22, 1999 at 18:15:57, Chuck wrote: >> >>>For White's 26th move Fritz 5 scores Bg2 -0.09 at 14 ply. >> >> >> >> >>This is a rare case of Fritz blowing a tactical position. White is totally >>busted here, and it doesn't matter what he plays. Let it continue to search >>and I'll bet it fails low at 15 or 16... > >No such luck. Just got to 16 ply, and it actually gives a plus score >for white after 26. Bg2. It gives ...Qc2 27. Qf1 Bxg2 28. Kxg2 Qe4+ >29. Kg1 Qxd4 30. Qe2 f4 31. Rxb7 and gives it a score of 0.12 pawns >in white's favor. As soon as 26...Qc2 is made, it goes to -0.22 >at 14 ply. I never understand why Fritz does this sort of flip- >flop in eval. You follow the line it gives and after you make the >supposed best move, the eval changes based on something it should have >seen earlier. In other words it searches to 16 ply, then you make >the move it suggests, and suddenly by 11 or 12 ply it gives a >decidedly different eval. Maybe this is a selective search thing? I think that not all of the eval is done at the tips (unlike, say Crafty.) I think that Rebel is similar in this respect, though I don't know for sure, of course. Dave
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