Author: Sune Fischer
Date: 07:22:13 10/31/02
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On October 31, 2002 at 08:35:37, Peter Berger wrote: >Crafty seems to evaluate KRRKRN as a dead draw. > >KnightDreamer v3.1b - Crafty-19.0 >[D]5R2/8/8/5n1R/4k1rP/8/5K2/8 b - - 0 1 > >Analysis by Crafty 19.01: > >77...Sxh4 78.Txh4 Txh4 > = (0.00) Tiefe: 12/22 00:00:06 4463kN, tb=5298 >77...Sxh4 78.Txh4 Txh4 > = (0.00) Tiefe: 13/23 00:00:16 11939kN, tb=11852 > >How about this one? Still dead draw according to Crafty - or is it? Yes, I think so, black to move and can force a tablebase draw: 2 343 5 54 1...Ne3 1.Ke2 2 341 5 124 1...Nd4 1.Ke1 2 0 10 126 1...Nxh4 3 0 15 195 1...Nxh4 4 0 22 497 1...Nxh4 5 0 65 1722 1...Nxh4 6 0 110 5110 1...Nxh4 7 0 217 16686 1...Nxh4 8 0 446 48209 1...Nxh4 9 0 860 151669 1...Nxh4 10 0 1891 448051 1...Nxh4 11 0 3783 1423122 1...Nxh4 >KnightDreamer v3.1b - Crafty-19.0 >8/8/2R5/1R6/4rn2/8/8/k4K2 b - - 0 1 > >I haven't checked with 6-men statistics or tablebases, but I really doubt that >this ending is that drawish at all in general - at least a 0.0 can lead to >serious problems as in this blitzgame: 1...Ra4 looks like a mate in 19: Entering Nalimov table bases! Re4e1 : mate in -5 (-299991) Ka1a2 : mate in -2 (-299997) Nf4g6 : mate in -2 (-299997) Nf4e6 : mate in -2 (-299997) Nf4h5 : mate in -2 (-299997) Nf4d5 : mate in -2 (-299997) Nf4h3 : mate in -2 (-299997) Nf4d3 : mate in -2 (-299997) Nf4g2 : mate in -2 (-299997) Nf4e2 : mate in -2 (-299997) Re4e8 : mate in -1 (-299999) Re4e7 : mate in -1 (-299999) Re4e6 : mate in -14 (-299973) Re4e5 : mate in -1 (-299999) Re4d4 : mate in -2 (-299997) Re4c4 : mate in -2 (-299997) Re4b4 : mate in -2 (-299997) Re4a4 : mate in -19 (-299963) Re4e3 : mate in -2 (-299997) Re4e2 : mate in -11 (-299979) I'm still testing the implementation, but it seems to play it correctly so I think it is right :) -S.
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