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Subject: Re: a test position for chess programs(fritz could not solve it in a game)

Author: Ernst Walet

Date: 22:25:31 04/02/00

Go up one level in this thread

Fritz6a (p3-450, 80MB hash, 4-man TB) needs 78 minutes to switch to Kc3.  Seems
not so easy after all?

New position
6Q1/8/8/8/1p2p2P/1k6/5PK1/q7 b - - 0 1

Analysis by Fritz 6:

1...Kc3
  +-  (5.25)   Depth: 1/4   00:00:00
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2 2.Qg7+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6
  ³  (-0.56)   Depth: 6/16   00:00:00  9kN
1...Kb2--
  =  (-0.25)   Depth: 7/18   00:00:00  12kN
1...Kb2 2.Qg7+ Kb1 3.Qh7 Qd4 4.f3 Qd2+ 5.Kh3 b3
  =  (0.19)   Depth: 7/20   00:00:00  29kN
1...Kb2 2.Qg7+ Kb1 3.Qg6 Qd4 4.f3 b3 5.fxe4 b2
  =  (-0.09)   Depth: 8/21   00:00:00  79kN
1...Kb2 2.Qh8+ Kb1 3.Qh7 Qd4 4.f3 Qd2+ 5.Kh3 b3 6.Qxe4+
  =  (0.12)   Depth: 9/23   00:00:01  268kN, tb=1
1...Kb2 2.Qg7+ Kb1 3.Qg6 Qd4 4.f3 Qd2+ 5.Kh3 b3 6.Qxe4+
  =  (0.00)   Depth: 10/25   00:00:02  673kN, tb=3
1...Kb2 2.Qg7+ Kb1 3.Qg6 Qe5 4.f3 b3 5.fxe4 b2 6.h5
  =  (0.00)   Depth: 11/27   00:00:09  2402kN, tb=21
1...Kb2 2.h5 Qd1 3.h6 Qf3+ 4.Kg1 e3 5.h7 Qxf2+ 6.Kh1
  =  (0.00)   Depth: 12/28   00:00:22  6217kN, tb=81
1...Kb2 2.h5 Qd1 3.h6 Qf3+ 4.Kg1 e3 5.h7 Qxf2+ 6.Kh1
  =  (0.00)   Depth: 13/30   00:00:48  14169kN, tb=346
1...Kb2 2.h5 Qd1 3.h6 Qf3+ 4.Kg1 e3 5.h7 Qxf2+ 6.Kh1
  =  (0.00)   Depth: 14/31   00:02:01  38846kN, tb=1200
1...Kb2 2.h5 Qd1 3.h6 Qf3+ 4.Kg1 e3 5.h7 Qxf2+ 6.Kh1
  =  (0.00)   Depth: 15/34   00:04:51  95234kN, tb=3809
1...Kb2 2.h5 Qd1 3.h6 Qf3+ 4.Kg1 e3 5.h7 Qxf2+ 6.Kh1
  =  (0.00)   Depth: 16/36   00:11:14  229378kN, tb=9791
1...Kb2--
  ²  (0.47)   Depth: 17/40   00:22:04  457823kN, tb=19951
1...Kb2 2.Qh8+ Kb1 3.Qxa1+ Kxa1 4.h5 b3 5.h6 b2 6.h7
  ±  (1.37)   Depth: 17/40   00:29:37  628993kN, tb=27074
1...Kc2
  ±  (1.34)   Depth: 17/40   01:18:30  1634920kN, tb=77814
1...Kc2 2.Qc4+ Qc3 3.Qxe4+ Kc1 4.h5 b3 5.h6 b2 6.Qf4+
  ²  (0.44)   Depth: 17/41   01:59:51  2504804kN, tb=132093
1...Kc2 2.Qc4+ Qc3 3.Qxe4+ Kc1 4.h5 b3 5.h6 b2 6.Qf4+
  =  (0.00)   Depth: 18/43   02:45:27  3448326kN, tb=189248
1...Kc2 2.Qc4+ Qc3 3.Qxe4+ Kc1 4.h5 b3 5.h6 b2 6.Qf4+
  =  (0.00)   Depth: 19/44   06:00:33  7762316kN, tb=539178

Ernst.

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