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Subject: Re: nice queen sac

Author: Mikael Bäckman

Date: 09:25:57 03/12/04

Go up one level in this thread


On March 11, 2004 at 23:21:17, Jon Dart wrote:

>From a game Chepla-Arasan, on ICC:
>
>[D] 3q1r1k/1P1n2p1/4R2p/2QBp2P/3pPb2/R1p2P2/5P2/5K2 w - -
>
>Qxf8+!
>
>It is decisively winning: the next move, Arasan did not
>predict this, but after the move showed a score of about -24,
>and resigned.
>
>Arasan 7.4 takes 39 seconds to find this move on an Athlon
>XP 2500+.
>
>--Jon


Chepla on AMD 1300 Mhz finds Qxf8 after 14.5 seconds, but takes a while before
it returns a high score.

   1.61      22k   0.1 Qc6 Nb8 Qc4 Qg5 Qc5 5/13
   1.28      48k   0.1 Qc6 Nb8 Qb5 c2 Ke1 6/12
   1.67      87k   0.2 Qc4 Nb8 Rg6 Bg5 Re6 Nd7 Ra8 Qc8 6/15
   1.54     218k   0.4 Qc4 Qh4 Ra8 Qh1+ Ke2 Qb1 Rxf8+ Nxf8 Re8 Qb2+ Kf1 7/17
   1.52     465k   0.8 Qc4 Qh4 Ra8 Qh1+ Ke2 Qb1 Re7 Nb8 Ra2 8/20
   1.84    1212k   2.1 Qc4 Nb8 Ra8 Qg5 Qc8 Nd7 b8=q c2 Qxd7 9/20
   1.87    2415k   4.1 Qc4 Nb8 Ra8 Qd7 Qc5 Qd8 Re7 d3 Rxb8 Qxb8 10/24
   1.54    7156k  12.6 Qc4 Qh4 Ra8 Be3 Rxf8+ Nxf8 b8=b Nxe6 Qc8+ Qd8 Qxd8+
                       Nxd8 f4 exf4 Bg8 11/27
   1.94    8475k  14.5 Qxf8+ Qxf8 Rc6 Kh7 Ra8 Nb8 Rc8 c2 Rxf8 c1=q+ Kg2 d3
                       Bg8+ Kh8 11/24
   2.23    9877k  16.5 Qxf8+ Qxf8 Rc6 Kh7 Ra8 Nb8 Rxb8 Qxb8 Rc8 Qxb7 Bxb7
                       Bg5 Rc7 12/26
   2.56   13461k  21.7 Qxf8+! Qxf8 Rc6 Kh7 Rc8 Qxa3 Bg8+ Kh8 b8=q Qc1+ Kg2
                       Qh1+ Kxh1 Bg3 13/27
   2.59   19171k  29.9 Qxf8+ Qxf8 Rc6 Kh7 Rc8 c2 Ra3a8 Nb8 Ra1 Qh8 Bf7 14/29
   2.92   55369k  92.8 Qxf8+! Qxf8 Rc6 Kh7 Rc8 c2 Ra3a8 Nb8 Rxf8 c1=q+ Kg2
                       Bg3 fxg3 Qd2+ Kg1 Qd1+ Kh2 g6 15/31
  11.62  213565k  299.6 Qxf8+ Qxf8 Ra8 Nb8 Rc6 g6 Rc8 Kg7 Rxf8 Kxf8 Rxb8+
                        Ke7 Rc8 gxh5 16/34


/Mikael



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