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Subject: Re: Can't solve this simple position!!

Author: Uri Blass

Date: 00:42:16 04/25/03

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On April 25, 2003 at 03:10:44, Jouni Uski wrote:

>Shredder don't solve in my P4 2,4 Ghz in 10 minutes WITH tablebases. WITHOUT
>tablebases solves, but I prefer to use them!
>
>Jouni

Shredder without tablebases needs depth 18 to find Bh3

I have not most of the tablebases including the KBPP vs K so I do not know what
it does with all the 5 piece tablebases(including KBPP vs K) and results of
Shredder with part of the tablebases may be different for users with different
tablebases.

New game
[D]8/8/8/5bk1/8/8/4B1PP/5K2 b - - 0 1

Analysis by Shredder 7.04:

1...Bd3 2.Bxd3
  +-  (5.38)   Depth: 1/2   00:00:00
1...Bd3 2.Bxd3
  +-  (5.36)   Depth: 1/2   00:00:00
1...Kh4
  +-  (1.93)   Depth: 1/2   00:00:00
1...Kh4
  +-  (1.93)   Depth: 1/2   00:00:00
1...Kh4 2.g3+ Kh3
  +-  (1.88)   Depth: 2/3   00:00:00
1...Kh4 2.Kf2 Be4
  +-  (1.64)   Depth: 3/7   00:00:00
1...Kh4 2.Kf2 Be4 3.g3+ Kh3
  +-  (2.00)   Depth: 4/7   00:00:00
1...Kh4 2.Bc4
  +-  (1.99)   Depth: 4/7   00:00:00
1...Kh4 2.Kf2 Be6 3.Bb5 Kg4
  +-  (2.00)   Depth: 5/9   00:00:00
1...Kh4 2.Kf2 Be6 3.Bf1 Kg5 4.Bd3
  +-  (2.00)   Depth: 6/9   00:00:00  4kN
1...Kh4 2.Kf2 Be6 3.Bd3 Bg4 4.Kf1 Be6
  +-  (1.99)   Depth: 7/11   00:00:00  9kN
1...Kh4 2.Kf2 Be6 3.Bd3 Bd7 4.Ke3 Be6 5.Kf3
  +-  (2.06)   Depth: 8/11   00:00:00  18kN
1...Kh4 2.Bc4 Kg4 3.Kg1
  +-  (1.99)   Depth: 9/15   00:00:01  55kN
1...Kh4 2.Kf2 Be4 3.g4 Kh3 4.Ke3 Bh7 5.g5 Kxh2 6.Kf4
  +-  (2.22)   Depth: 10/17   00:00:01  113kN
1...Kh4 2.Kf2 Be4 3.Bf3 Bh7 4.Ke3 Bf5 5.Kf4 Be6 6.Be2 Bd5 7.Bf3 Be6 8.Be2 Bd5
9.Bf3 Be6 10.Be2
  +-  (2.17)   Depth: 11/17   00:00:02  164kN
1...Kh4 2.Kf2 Be4 3.Bf3 Bh7 4.Ke3 Bf5 5.Kf4 Be6 6.Ke5 Bd7 7.Be4
  +-  (2.23)   Depth: 12/17   00:00:02  195kN
1...Kh4 2.Kf2 Be4 3.Bf1 Kg4 4.Bb5
  +-  (2.22)   Depth: 13/21   00:00:02  283kN
1...Kh4 2.Kf2 Bc8 3.Bf1 Kg4 4.g3 Kf5 5.h4 Ke4
  +-  (2.43)   Depth: 14/22   00:00:03  600kN
1...Kh4 2.Kf2 Be4 3.g3+ Kh3 4.Kg1 Bb1 5.Bf1+ Kg4 6.Kf2
  +-  (2.43)   Depth: 15/23   00:00:05  1120kN
1...Kh4 2.g3+ Kh3 3.Kg1 Bb1 4.Bc4 Kg4 5.Be6+ Kg5 6.h4+ Kf6 7.Bc4 Bf5 8.Be2 Be4
  +-  (2.47)   Depth: 16/25   00:00:07  1447kN
1...Kh4 2.Kg1 Bb1 3.g3+ Kh3 4.Bf1+ Kg4 5.Kg2 Ba2 6.Be2+ Kg5 7.Kf2 Kg6
  +-  (2.49)   Depth: 17/25   00:00:11  2214kN
1...Kh4 2.Kf2 Be6 3.Ke3 Kg5 4.g3 Bh3 5.Kf2 Kf5
  +-  (2.63)   Depth: 18/27   00:00:18  4141kN
1...Bh3 2.gxh3 Kf4 3.h4 Ke5 4.Bf3
  +-  (2.62)   Depth: 18/27   00:00:22  5393kN
1...Bh3 2.gxh3 Kf4 3.h4 Ke5 4.Kf2
  +-  (2.27)   Depth: 18/27   00:00:26  6313kN
1...Bh3 2.Bc4 Kh4 3.Ba2 Bxg2+ 4.Kxg2 Kg5 5.Kg3
  =  (0.01)   Depth: 18/27   00:00:31  7673kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Bf1 Kg5 6.h4+ Kf6 7.h5 Kg7 8.Bd3 Kh6
9.Bc4
  =  (0.05)   Depth: 19/27   00:00:32  8025kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Bf1 Kg5 6.Kf2 Kg6
  =  (0.05)   Depth: 20/27   00:00:33  8435kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Bf1 Kg5 6.h4+ Kf6 7.Kg4 Kg7 8.Be2 Kh7
9.Bd3+ Kg8 10.h5
  =  (0.06)   Depth: 21/27   00:00:36  9104kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Bf1 Kg5 6.Bd3 Kh6 7.Kf2 Kh5
  =  (0.06)   Depth: 22/27   00:00:38  9907kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Bf1 Kg5 6.Bd3 Kh6 7.Kf2 Kh5
  =  (0.06)   Depth: 23/29   00:00:41  10744kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Bf1 Kg5 6.Bd3 Kh6 7.Kf2 Kh5 8.Kg2 Kh6
  =  (0.06)   Depth: 24/29   00:00:45  11803kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Bc4 Kf6 5.Kf3
  =  (0.07)   Depth: 25/31   00:00:56  15515kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Bc4 Kf6 5.Kf3 Kg5 6.Be2 Kh4 7.Bf1
  =  (0.07)   Depth: 26/31   00:01:02  17350kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Kf2 Kf5 6.Bd3+ Kf4 7.Bc4 Kg5 8.Bf1 Kg6
9.Bc4 Kh5
  =  (0.07)   Depth: 27/31   00:01:16  21982kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Kf2 Kf5 6.Bd3+ Kf4 7.Bc4 Kg5
  =  (0.07)   Depth: 28/32   00:01:26  24949kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Kf2 Kf5 6.Bd3+ Kg5 7.Bf1 Kh6 8.Bd3 Kg5
9.Bf1 Kh6 10.Bd3 Kg5 11.Bf1
  =  (0.07)   Depth: 29/33   00:01:37  28081kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Kf2 Kf5 6.Bd3+ Kg5 7.Bf1 Kh6 8.Bd3 Kg5
9.Bf1 Kh6 10.Bd3 Kg5 11.Bf1
  =  (0.07)   Depth: 30/34   00:01:52  32304kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Kf2 Kf5 6.Bd3+ Kg5 7.Bf1 Kh6 8.Bd3 Kg5
9.Bf1 Kh6 10.Bd3 Kg5 11.Bf1
  =  (0.07)   Depth: 31/34   00:02:27  42800kN
1...Bh3 2.gxh3 Kh4 3.Kg2 Kg5 4.Kg3 Kg6 5.Kf2 Kf5 6.Bd3+ Kg5 7.Bf1 Kh6 8.Bd3 Kg5
9.Bf1 Kh6 10.Bd3 Kg5 11.Bf1
  =  (0.07)   Depth: 32/35   00:02:53  50837kN

(Blass, Tel-Aviv 25.04.2003)


Uri



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