Author: Dieter Buerssner
Date: 17:59:27 06/19/04
Go up one level in this thread
On June 19, 2004 at 19:41:33, Dieter Buerssner wrote:
>On June 18, 2004 at 23:49:43, Dann Corbit wrote:
>>k7/8/1p6/p1p5/2P4K/8/PP6/8 w - - acd 31; acn 800599810; acs 1801; bm a4; ce
>>40; id "bote.4"; pv a4 Kb7 Kh5 Kc6 Kg5 Kc7 Kg6 Kc6 b3 Kd6 Kf6 Kc6 Ke6 Kc7 Ke7
>>Kc6 Kd8 Kb7 Kd7 Ka6 Kc6 Ka7 Kc7 Ka6 Kd7 Ka7 Kc6 Ka6 Kd6 Ka7;
>>
>>k7/8/pp6/2p4K/8/PPP5/8/8 w - - acd 32; acn 583558632; acs 1800; bm c4; ce 1;
>>id "(Simon Finn on CCC) Grigoriev 1933"; pv Kg6 Kb7 Kf5 Kc6 c4 b5 Ke5 b4 axb4
>>cxb4 Ke4 a5 Kd4 Kb6 Kd3 Kc6 Ke4 Kc5 Ke3 a4 bxa4;
>
>One might want to mention, that pos 4 above is 2 moves into pos 5.
Obviously wrong, sorry. No idea, why I thought it. I said it from memory without
really checking. Here Yace results with aggressive TB usage (with makes finding
the solution slower, but shows a nice mate score.
Bote 4:
16937106 3:54.7 11.53 20++ 1.a4 Kb7 2.Kh5 Kc6 3.Kg5 Kc7 4.Kg6 Kc6 5.b3 Kc7
6.Kg7 Kc6 7.Kf8 Kb7 8.Kf7 Kb8 9.Ke6 Kc7 10.Ke7
Kc6 11.Kd8 Kd6 12.Kc8 Kc6 13.Kb8 b5 14.axb5+
Kd6 15.Ka7 Ke7 16.Ka6 Ke6 17.b6 Ke5 18.b7 Kf5
19.Kb5 Kf4 20.b8=Q+ Ke3 21.Kxc5H Kf2H {HT}
21330272 4:33.8 16.53 20++ 1.a4 Kb7 2.Kh5 Kc6 3.Kg5 Kc7 4.Kg6 Kc6 5.b3 Kc7
6.Kg7 Kc6 7.Kf8 Kd6 8.Ke8 b5 9.axb5 Ke5 10.b6
a4 11.bxa4 Kd6 12.b7 Ke6 13.b8=Q Kf5
50422710 10:24.1 Mat31 20t 1.a4 Kb7 2.Kh5 Kc6 3.Kg5 Kc7 4.Kg6 Kc6 5.b3 Kc7
6.Kg7 Kc6 7.Kf8 Kb7 8.Kf7 Kc6 9.Ke6H Kc7H
10.Ke7H Kc6H 11.Kd8H Kd6H 12.Kc8H Kc6H 13.Kb8H
b5H 14.cxb5+H Kd7H 15.Kb7H Kd6H 16.Kb6H Kd5H
17.Kc7H Kd4H 18.Kc6H c4H 19.bxc4H Ke5H 20.b6H
Kd4H 21.b7H Kd3H 22.Kb6H {HT} {160}
Got only about 10% CPU time, because of the excessive probing of TBs.
For the Grigoriev challange posted by Simon Finn, I got Mate in 37 earlier. I
saved the following PV:
1.c4 Ka7 2.a4 Kb7 3.Kg5 Kc7 4.Kg6 Kc6 5.Kf5 Kd6
6.a5 Kc7 7.Ke6 Kc6 8.Ke7 Kc7 9.Ke8 Kc6 10.Kd8
bxa5 11.Ke7 Kc7 12.Ke6 Kc6 13.Ke5 Kc7 14.Kd5
Kb6 15.Kd6 Kb7 16.Kxc5 Kc7 17.Kd5 Kd7 18.c5 Kc7
19.c6 Kb8 20.Kd4 Kc8 21.Kc4 Kd8 22.Kd5 Kc7
23.Kc5 Kd8 24.Kb6 Kc8 25.Kxa6 {EGTB} 25...Kc7!
26.Kb5! Kc8 27.Kc5 Kc7! 28.Kd5!! a4 29.bxa4!!
Kc8 30.Kd6! Kd8! 31.c7+ Kc8! 32.a5!! Kb7
33.a6+! Kb6 34.a7 Kb7 35.c8=R Kb6 36.a8=Q! Kb5
37.Qa3 Kb6 38.Rb8#! {1501}
Regards,
Dieter
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