Author: Gerd Isenberg
Date: 11:18:28 08/14/02
Go up one level in this thread
On August 14, 2002 at 05:06:31, Steffen Jakob wrote: >On August 14, 2002 at 03:22:54, Uri Blass wrote: > >>On August 14, 2002 at 01:01:57, Slater Wold wrote: >> >>>White(1): setboard 8/8/3pR1P1/2k5/8/1p1b4/7K/8 b - - 0 67 >>>Black(1): go >>>end-game phase >>> clearing hash tables >>> time surplus 0.00 time limit 3:00 (3:00) >>> nss depth time score variation (1) >>>starting thread 1 >>> (4) 8-> 0.39 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> (3) 9 0.48 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> (4) 9-> 0.73 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> (3) 10 0.97 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> (4) 10-> 1.67 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> (3) 11 1.70 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> (4) 11-> 3.55 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> (3) 12 3.55 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> (4) 12-> 7.45 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> (3) 13 7.53 0.01 1. ... Bxg6 2. Rxg6 <HT> >>> 13 21.12 ++ 1. ... b2!! >>> 13-> 2:49 -0.38 1. ... b26 >>> time=3:00 cpu=307% mat=1 n=242037717 fh=94% nps=1342k >>> ext-> chk=29936339 cap=78644 pp=227271 1rep=1144737 mate=32723 >>> predicted=0 nodes=242037717 evals=21110434 >>> endgame tablebase-> probes done=239240 successful=53187 >>> SMP-> split=778 stop=81 data=9/32 cpu=9:13 elap=3:00 >>> >>>Black(1): b2 >>> time used: 3:00 >>> >>>#1 - You should see b2 wins pretty much immediatly. Sure, 21.12 seconds isn't >>>bad, but imagine this on a PIII 600! -0.38 isn't very convincing either. >> >>I disagree. >> >>seeing that b2 is winning is not an easy task for programs. >> >>Here is some analysis on p850 >>with part of the tablebases(including KR vs KPP) >> >>Junior7 could not see it in a minute(I stopped it so I do not know if it is >>faster than Crafty) when Deep Fritz also needed time >>(faster than Crafty but Crafty is only an amateur) >> >>My crafty also needs depth 14 to find it under chessbase gui >>and I do not find that amateurs like Comet are better and >>at least CometB27 that is not very old >>could not find it in 3 minutes when Crafty could do it. > >>>#3 - Any reason you can see why Crafty would take *forver* (even after this >>>move) to see the win? >> >>The win is not simple without the relevant knowledge >>that most programs do not have. > >Hossa 1.150: > >8 | | | | | | | | | > +---+---+---+---+---+---+---+---+ Black: Hossa v1.151 (C) 0 >7 | | | | | | | | | > +---+---+---+---+---+---+---+---+ Black material: 5.21 >6 | | | |=P=| R | | P | | > +---+---+---+---+---+---+---+---+ >5 | | |=K=| | | | | | > +---+---+---+---+---+---+---+---+ Black to move >4 | | | | | | | | | > +---+---+---+---+---+---+---+---+ 8/8/3pR1P1/2k5/8/1p1b4/7K/8 b >3 | |=P=| |=B=| | | | | > +---+---+---+---+---+---+---+---+ White material: 6.07 >2 | | | | | | | | K | > +---+---+---+---+---+---+---+---+ White: opponent 0 >1 | | | | | | | | | > +---+---+---+---+---+---+---+---+ > a b c d e f g h >3> analyze > 1 +0.49 0.00 2 1... b2 > <1> +0.49 0.00 21 1... b2 > 2 +0.14 0.01 132 1... b2 2.g7 d3h7 > <2> +0.14 0.01 199 1... b2 2.g7 d3h7 > 3 +0.12 0.01 532 1... b2 2.g7 d3h7 3.e6e1 > <3> +0.12 0.04 698 1... b2 2.g7 d3h7 3.e6e1 >! 4 +0.54 0.05 1403 1... b2 >! 4 +0.94 0.06 2563 1... b2 2.g7 d3h7 3.g7g8Q h7xg8 > <4> +0.94 0.10 3432 1... b2 2.g7 d3h7 3.g7g8Q h7xg8 >? 5 -0.01 0.48 11956 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 > <5> -0.01 0.59 15162 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 >! 6 +0.41 0.74 19660 1... b2 >! 6 +1.20 0.80 25851 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.g7g8Q h7xg8 > <6> +1.20 0.87 29562 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.g7g8Q h7xg8 > 7 +0.94 1.11 42373 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.g7g8Q h7xg8 5.Kg3 > <7> +0.94 1.54 58226 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.g7g8Q h7xg8 5.Kg3 >! 8 +1.36 2.24 93518 1... b2 >! 8 +3.41 2.76 131545 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 Kc3 5.e1e3 Kd2 6.e3b3 > <8> +3.41 2.84 135887 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 Kc3 5.e1e3 Kd2 6.e3b3 > 9 +3.09 6.26 297443 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 Kc3 5.Kf4 h7g8 6.Ke4 > <9> +3.09 7.20 332571 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 Kc3 5.Kf4 h7g8 6.Ke4 > 10 +3.35 12.74 616931 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 Kc3 5.Kf4 Kc2 6.e1e2 Kb3 > 7.e2e3 Ka2 > <10> +3.35 15.11 777543 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 Kc3 5.Kf4 Kc2 6.e1e2 Kb3 > 7.e2e3 Ka2 > 11 +3.35 40.31 2823617 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 Kc3 5.e1h1 h7g8 6.Kf4 Kc2 > 7.h1h2 Kc3 > <11> +3.35 58.08 3751282 1... b2 2.g7 d3h7 3.e6e1 Kd4 > 4.Kg3 Kc3 5.e1h1 h7g8 6.Kf4 Kc2 > 7.h1h2 Kc3 > >Greetings, >Steffen. Very impressive, Steffen. Zugzwang sensible position. Isi (Athlon XP2000+) finds b2 in 2 seconds with draw score and realised a +0.28 after 25 seconds, but winning score (>2) not until 4 minutes. PV: 3..Kc4 4.Kg3 Kb3 5.Kf4 Ka2 6.Ra2+ Ka1 7.Re1+ b1=Q 8.Rxb1 Kxb1 9.Kg5 Bg8 Regards, Gerd
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