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Subject: Re: Rybka - not an endgame expert

Author: Arnon Yogev

Date: 05:46:33 12/05/05

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>8/8/1P1k2p1/8/5P1p/4Qb2/1q4PK/8 w - - bm Qe5+;                 id "PET046: Q+B
>vs Q";
>
>Rybka captures at f3.
>
>
>Both positions are easily solved by most of the engines. Position No26 usually
>in 0 seconds.

New game, Blitz:5' GT
8/8/1P1k2p1/8/5P1p/4Qb2/1q4PK/8 w - - 0 1

Analysis by Rybka 1.0 Beta 32-bit:

1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Qb3+ Kf6 5.Kg4
  ±  (0.78)   Depth: 3   00:00:00
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Qb3+ Kf6 5.Kg4
  ±  (1.14)   Depth: 4   00:00:00
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Qb3+ Kf6 5.Kg4
  ±  (1.15)   Depth: 5   00:00:00
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Qb3+ Kf6 5.Kg4
  ±  (1.08)   Depth: 6   00:00:00  2kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Qb3+ Kf6 5.Kg4
  ±  (1.21)   Depth: 7   00:00:00  9kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Qb3+ Kf6 5.Kg4
  ±  (1.16)   Depth: 8   00:00:00  16kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Qb3+ Kf6 5.Kg4
  ±  (1.15)   Depth: 9   00:00:00  16kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Qb3+ Kf6 5.Kg4
  ±  (1.15)   Depth: 10   00:00:00  17kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Qb3+ Kf6 5.Kg4
  ±  (1.15)   Depth: 11   00:00:01  17kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Kg4 Qf5+ 5.Kg3 Qd5
  ±  (1.17)   Depth: 12   00:00:09  450kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Kg4 Qf5+ 5.Kg3 g5
  ±  (1.15)   Depth: 13   00:00:28  1413kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Kxh4 Ke6 4.Kg4 Qf5+ 5.Kg3 g5
  ±  (1.17)   Depth: 14   00:01:02  3014kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Qd3+ Ke7 4.Kxh4 Qf2+ 5.Qg3 Qd4
  ±  (1.16)   Depth: 15   00:02:34  7667kN
1.Qxf3 Qxb6 2.Kh3 Qc5 3.Qd3+ Ke7 4.Kxh4 Qf2+ 5.Qg3 Qd4
  ±  (1.17)   Depth: 16   00:04:15  12637kN
1.Qe5+ Qxe5 2.fxe5+ Kc5 3.gxf3 Kxb6 4.f4 Kc5 5.Kh3 g5
  +-  (2.59)   Depth: 16   00:05:00  14620kN
1.Qe5+ Qxe5 2.fxe5+ Kc5 3.gxf3 Kxb6 4.f4 Kc5 5.Kh3 Kd5
  +-  (3.06)   Depth: 17   00:05:03  14766kN

(Arnon, GT 05.12.2005)



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