Author: Kurt Utzinger
Date: 23:00:47 01/18/02
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On January 17, 2002 at 21:38:44, David Rasmussen wrote: >[D]2r1r1k1/1b4p1/2p1p2p/pp2q3/1P6/PQ2P3/5PPP/1BR2RK1 w - - 0 25 > >What program plays Rc5, even though it allows black to save his pawn by a4? bxa5 >wins a pawn for white, but leaves doubles isolated pawns on the a-file, which >allows counterplay. With 25. Rc5 a4 white has all the positional advantages. > >/David TheKing 3.12 X [see tournament T2002 80'/40] and Shredder 6.32 show the correct move in their analysis: Neue Partie 2r1r1k1/1b4p1/2p1p2p/pp2q3/1P6/PQ2P3/5PPP/1BR2RK1 w - - 0 1 Analysis by TheKing 3.12 X on Ath 1.4/256 with 32 MB hash: 1.Lg6 Ted8 2.Dc2 axb4 3.axb4 ± (1.25) Tiefe: 3 00:00:00 1.Lg6 Ted8 2.f4 Dd6 3.Tfd1 ± (1.30) Tiefe: 4 00:00:00 1.Tc5 Df6 2.bxa5 Tcd8 3.Dc2 ± (1.32) Tiefe: 4 00:00:00 1.Tc5 Df6 2.Dc2 Tcd8 3.Dh7+ Kf8 4.bxa5 ± (1.31) Tiefe: 5 00:00:00 14kN 1.Tc5 Df6 2.bxa5 Tcd8 3.a6 De7 4.Db4 +- (1.49) Tiefe: 6 00:00:00 35kN 1.Tc5 Df6 2.bxa5 Ted8 3.Lf5 Kf7 4.a4 De7 ± (1.31) Tiefe: 7 00:00:00 78kN 1.Tc5 Dd6 2.Td1 De7 3.Lf5 axb4 4.axb4 Ta8 5.Lg6 +- (1.45) Tiefe: 8 00:00:01 293kN 1.Tc5 Df6 2.bxa5 Ta8 3.Le4 De7 4.Db4 Txa5 5.Lxc6 Lxc6 6.Txc6 Txa3 7.Dxb5 +- (1.52) Tiefe: 9 00:00:05 814kN 1.Tc5 a4 2.Lh7+ Kf8 3.Dc2 Dc7 4.De4 Tcd8 5.Lg6 Te7 6.Df3+ Kg8 +- (1.48) Tiefe: 10 00:00:11 1705kN 1.Tc5 Df6 2.bxa5 Ta8 3.Db4 Dd8 4.Le4 Dxa5 5.Lxc6 Lxc6 6.Txc6 Dxb4 7.axb4 Ta2 8.Td1 ± (1.38) Tiefe: 11 00:00:27 4817kN 1.Tc5 a4 2.Lh7+ Kf8 3.Dc2 Df6 4.Le4 Ted8 5.Tc1 Td7 6.f4 Tcd8 7.Lxc6 Lxc6 8.Txc6 +- (1.41) Tiefe: 12 00:02:19 24743kN 1.Tc5 Df6 2.bxa5 Ta8 3.Td1 De7 4.Te5 Txa5 5.Lg6 Txa3 6.Txe6 Txb3 7.Txe7 ± (1.32) Tiefe: 13 00:05:17 57684kN (Utzinger, Wetzikon 19.01.2002) -------------------------------------------------------------------------------------------- Neue Partie 2r1r1k1/1b4p1/2p1p2p/pp2q3/1P6/PQ2P3/5PPP/1BR2RK1 w - - 0 1 Analysis by Shredder 6.32 on Ath 1.4/256 with 32 MB hash: 1.bxa5 +- (1.44) Tiefe: 1/2 00:00:00 1.bxa5 +- (1.44) Tiefe: 1/2 00:00:00 1.bxa5 Dd5 ± (1.19) Tiefe: 2/4 00:00:00 1.bxa5 Dd5 ± (1.19) Tiefe: 2/4 00:00:00 1.bxa5 Dd5 2.Dc3 +- (1.44) Tiefe: 3/6 00:00:00 1.bxa5 Dd5 2.Dc3 +- (1.44) Tiefe: 3/6 00:00:00 1.bxa5 Dd5 2.Lh7+ Kxh7 3.Dd3+ Dxd3 ± (1.19) Tiefe: 4/8 00:00:00 1.bxa5 Dd5 2.Dc2 c5 3.Dh7+ Kf8 ± (1.18) Tiefe: 4/8 00:00:00 1.Dd3 Dg3 ± (1.19) Tiefe: 4/8 00:00:00 1.Dd3 axb4 2.Dh7+ Kf8 3.axb4 ± (1.35) Tiefe: 4/8 00:00:00 1.Dd3 axb4 2.axb4 c5 3.Dxb5 Dd5 ± (1.33) Tiefe: 5/10 00:00:00 1.Tc5 Dxe3 2.Dxe3 axb4 ± (1.34) Tiefe: 5/10 00:00:00 1.Tc5 Dc7 2.Lg6 a4 3.Dc3 +- (1.43) Tiefe: 5/10 00:00:00 1.Tc5 Dc7 2.Lg6 a4 3.Da2 Te7 +- (1.55) Tiefe: 6/12 00:00:00 1.Tc5 Df6 2.bxa5 Ta8 3.Le4 Tec8 4.Lf5 Txa5 5.Dxe6+ Df7 +- (1.64) Tiefe: 7/14 00:00:00 52kN 1.Tc5 Df6 2.bxa5 Ta8 3.Le4 Df8 4.Db4 Txa5 5.Lxc6 +- (1.48) Tiefe: 8/16 00:00:00 103kN 1.Tc5 Df6 2.bxa5 Ta8 3.Le4 De7 4.Te5 Dd6 5.Dc3 +- (1.48) Tiefe: 9/18 00:00:00 201kN 1.Tc5 Df6 2.bxa5 Ta8 3.Le4 Tec8 4.Db4 Dd8 5.Te5 c5 6.Dxb5 Lxe4 7.Txe4 Dxa5 8.Dxa5 Txa5 9.Txe6 Txa3 +- (1.43) Tiefe: 10/20 00:00:02 520kN 1.bxa5 Dd5 2.Db2 Tcd8 3.a4 Dd6 4.Tfd1 bxa4 5.Txd6 Txd6 +- (1.44) Tiefe: 10/20 00:00:03 832kN 1.bxa5 Dd5 2.Db2 c5 3.f3 La6 4.Dc2 Kf8 5.Tfd1 De5 +- (1.52) Tiefe: 10/20 00:00:04 1075kN 1.bxa5 Dd5 2.Db2 c5 3.f3 La6 4.Dc2 De5 5.Dh7+ Kf8 6.Le4 Ted8 +- (1.53) Tiefe: 11/22 00:00:05 1552kN 1.bxa5 Dd5 2.Db2 c5 3.f3 Dg5 4.f4 Dg4 5.Tf2 La6 6.De5 c4 7.Td2 +- (1.56) Tiefe: 12/24 00:00:11 3209kN 1.Tc5 Df6 2.bxa5 Ta8 3.Td1 Txa5 4.Td7 Lc8 5.Tc7 g6 +- (1.57) Tiefe: 12/24 00:00:14 4290kN 1.Tc5 Df6 2.bxa5 Ta8 3.Td1 Ted8 4.Txd8+ Txd8 5.f4 De7 6.Te5 +- (1.63) Tiefe: 12/24 00:00:19 5662kN 1.Tc5 Df6 2.bxa5 Ta8 3.Td1 De7 4.Dc2 Ted8 5.Td4 Txd4 6.Dh7+ Kf8 7.exd4 Txa5 +- (1.51) Tiefe: 13/26 00:00:36 10877kN 1.bxa5 Dd5 2.Db2 c5 3.f3 Dg5 4.f4 Dg4 5.Tf2 La6 6.De5 Tcd8 7.Dxc5 +- (1.52) Tiefe: 13/26 00:00:48 14473kN 1.bxa5 Dd5 2.Dc2 c5 3.f4 Ted8 4.Tfd1 Dh5 5.Txd8+ Txd8 6.Dxc5 +- (1.57) Tiefe: 13/26 00:01:00 17905kN 1.bxa5 Dd5 2.Db2 c5 3.f3 Dg5 4.f4 Dd5 5.Tfd1 Dc6 6.Dc2 Ta8 7.Dg6 Ted8 8.Txd8+ +- (1.63) Tiefe: 14/28 00:01:45 31121kN 1.Tfd1 c5 2.Dc2 axb4 3.Dh7+ Kf8 4.Td7 Ted8 5.Txb7 Td5 +- (1.64) Tiefe: 14/28 00:03:22 60123kN 1.Tfd1 c5 2.Dc2 Ted8 3.bxc5 Txd1+ 4.Txd1 Kf8 5.Td7 Txc5 6.Df5+ exf5 7.Tf7+ Kxf7 +- (1.64) Tiefe: 14/28 00:04:36 82852kN 1.Tfd1 c5 2.Dc2 Ted8 3.bxc5 Txd1+ 4.Txd1 Kf8 5.Dg6 Ke7 6.f4 Dxe3+ 7.Kh1 Kf8 8.Td8+ ± (1.40) Tiefe: 15/30 00:07:39 137942kN 1.bxa5 Dd5 2.Dc2 c5 3.f4 Ted8 4.Dh7+ Kf8 5.Tf2 Df5 6.Dxf5+ exf5 7.Lxf5 +- (1.41) Tiefe: 15/30 00:08:22 150154kN 1.bxa5 Dd5 2.Dc2 c5 3.f4 Df5 4.De2 Dd5 5.Tfd1 Dc6 6.Dc2 Ta8 7.Dg6 Kf8 8.e4 Kg8 +- (1.62) Tiefe: 15/30 00:09:35 171078kN 1.bxa5 Dd5 2.Dc2 c5 3.f4 Df5 4.De2 Dd5 5.Tfd1 Dc6 6.Dc2 Ta8 7.Dg6 Kf8 8.e4 Kg8 +- (1.63) Tiefe: 16/32 00:14:49 264261kN 1.Tc5 Df6 2.bxa5 Ta8 3.Db4 Dd8 4.De4 Kf8 5.La2 Dd6 6.Te5 Dxa3 7.Df4+ +- (1.64) Tiefe: 16/32 00:26:53 486416kN 1.Tc5 Df6 2.bxa5 Ta8 3.Db4 Dd8 4.De4 Kf8 5.La2 Df6 6.Db4 Kg8 +- (1.70) Tiefe: 16/32 00:31:32 574684kN (Utzinger, Wetzikon 19.01.2002)
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