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Subject: Rybka Beta 12 and Nullmove mate problem

Author: Eduard Nemeth

Date: 02:03:25 01/24/06

Matt in 7 moves. Composition by Eduard Nemeth, 2001:

[D]8/8/p3R3/1p5p/1P5p/6rp/5K1p/7k w - - 0 1

Analysis by Rybka 1.01 Beta 12 32-bit:

1.Te1+
  -+  (-4.93)   Tiefe: 3   00:00:00
1.Te1+ Tg1 2.Tf1
  -+  (-5.50)   Tiefe: 4   00:00:00
1.Te1+ Tg1 2.Te6 Tb1
  -+  (-3.91)   Tiefe: 5   00:00:00
1.Txa6 Tg1
  -+  (-3.64)   Tiefe: 5   00:00:00
1.Txa6 Tg1 2.Ke2
  -+  (-3.64)   Tiefe: 6   00:00:00  14kN
1.Txa6 Tg1 2.Ke2 Tg2+ 3.Kf3
  -+  (-3.64)   Tiefe: 7   00:00:00  15kN
1.Txa6 Tg1 2.Ke2 Tg2+ 3.Kf3 Tg4
  -+  (-3.64)   Tiefe: 8   00:00:00  15kN
1.Txa6 Tg1 2.Th6 Tb1 3.Ke2 Txb4
  -+  (-3.64)   Tiefe: 9   00:00:00  20kN
1.Txa6 Tg1 2.Th6 Tb1 3.Ke2 Txb4 4.Txh5
  -+  (-3.64)   Tiefe: 10   00:00:00  25kN
1.Txa6 Tg1 2.Th6 Tb1 3.Tg6 Txb4
  -+  (-3.64)   Tiefe: 11   00:00:00  36kN
1.Txa6 Tg1 2.Th6 Tb1 3.Tg6 Txb4 4.Tg5 Tb1 5.Txh5
  -+  (-3.64)   Tiefe: 12   00:00:01  49kN
1.Txa6 Tg1 2.Th6 Tb1 3.Tg6 Txb4 4.Tg5 Tb1 5.Txh5 Tb2+ 6.Kf1
  -+  (-3.64)   Tiefe: 13   00:00:01  68kN
1.Txa6 Tg1 2.Th6 Tb1 3.Tg6 Txb4 4.Tg5 Tb1 5.Txh5 Tb2+ 6.Kf1 Tg2
  -+  (-3.64)   Tiefe: 14   00:00:02  98kN
1.Txa6 Tg1 2.Th6 Tb1 3.Tg6 Txb4 4.Tg5 Tb1 5.Txh5 Tb2+ 6.Kf1 Tg2 7.Th6
  -+  (-3.64)   Tiefe: 15   00:00:02  130kN
1.Txa6 Tg1 2.Kf3 Tf1+ 3.Ke3 Tb1 4.Kf2 Tb2+ 5.Kf3 Tb3+ 6.Kf2 Tb1 7.Tf6 Txb4
  -+  (-3.64)   Tiefe: 16   00:00:07  515kN
1.Txa6 Tg1 2.Kf3 Tf1+ 3.Ke3 Tb1 4.Kf2 Tb2+ 5.Kf3 Tb3+ 6.Kf2 Tb1 7.Tf6 Txb4
  -+  (-3.64)   Tiefe: 17   00:00:07  566kN
1.Txa6 Tg1 2.Kf3 Tf1+ 3.Ke3 Tb1 4.Kf2 Tb2+ 5.Kf3 Tb3+ 6.Kf2 Tb1 7.Ta2 Tg1
  -+  (-3.64)   Tiefe: 18   00:00:08  670kN
1.Txa6 Tg1 2.Kf3 Tf1+ 3.Ke3 Tb1 4.Kf2 Tb2+ 5.Kf3 Tb3+ 6.Kf2 Tb1 7.Ta2 Tg1
  -+  (-3.64)   Tiefe: 19   00:00:10  798kN
1.Txa6 Tg1 2.Kf3 Tf1+ 3.Ke3 Tb1 4.Kf2 Tb2+ 5.Kf3 Tb3+ 6.Kf2 Tb1 7.Ta2 Tg1
  -+  (-3.64)   Tiefe: 20   00:00:11  951kN
1.Txa6 Tg1 2.Kf3 Tf1+ 3.Ke3 Tb1 4.Kf2 Tb2+ 5.Kf3 Tb3+ 6.Kf2 Tb1 7.Ta2 Tg1
  -+  (-3.64)   Tiefe: 21   00:00:13  1172kN
1.Txa6 Tg1 2.Kf3 Tf1+ 3.Ke3 Tb1 4.Kf2 Tb2+ 5.Kf3 Tb3+ 6.Kf2 Tb1 7.Ta2 Tg1
  -+  (-3.64)   Tiefe: 22   00:00:17  1594kN

(Nemeth, Privat 24.01.2006)

Rybka see Re1 with mate not.

Re: Rybka Beta 12 and Nullmove mate problem Uri Blass 05:17:49 01/24/06

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Last modified: Thu, 15 Apr 21 08:11:13 -0700

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