Author: Vincent Lejeune
Date: 13:59:19 10/20/03
Go up one level in this thread
On October 20, 2003 at 16:16:47, Drexel,Michael wrote: >On October 20, 2003 at 15:39:44, Darren Rushton wrote: > >>[D]2r1r3/pp3nkp/1q1p2p1/3P4/3NNP2/6Pb/PP1Q4/4RR1K w - - 0 25 >> >>The game turned out to be Botvinnik-Suttles, Belgrade 1969. The tempting 25.f5? >>is a mistake, in view of 25...Re4! In the game there followed 25.Rf3? Rc4 >>26.Rd3, and now instead of 26...Qb4?! 27.b3 Qd2 28.Rd2 Qc7 29.Rde2 Black could >>have equalized completely with 26...Bf5! 27.Nf5+ gf5 28.Rb3 Qc7. But White >>missed a winning line (pointed out by Tringov): >> >>25.b3!! Bf1 26.Qb2 Kf8 27.Ne6+ Re6 28.de6...Botwinnik himself [wrote]...'my old >>"illness" - weak combinational vision - was to blame'. >> >>How many programs find b3!! > >Does b3 really deserve !! ? >Can you show me the forced win? >I think it is at least not obvious. > >[Event "?"] >[Site "?"] >[Date "????.??.??"] >[Round "?"] >[White "New game"] >[Black "?"] >[Result "*"] >[SetUp "1"] >[FEN "2r1r3/pp3nkp/1q1p2p1/3P4/3NNP2/6Pb/PP1Q4/4RR1K w - - 0 1"] >[PlyCount "28"] > >1. b3 Rxe4 2. Rxe4 Bxf1 3. Ne6+ (3. Qb2 Kg8 4. Ne6 Ne5) 3... Kg8 4. Qb2 Ne5 5. >fxe5 (5. Rxe5 dxe5 6. Qxe5 Kf7) 5... Bd3 6. Re2 Bxe2 (6... dxe5) 7. exd6 Rc1+ >8. Qxc1 Bf3+ 9. Kh2 Qf2+ 10. Kh3 Bg4+ 11. Kh4 Bxe6 12. dxe6 Qh2+ 13. Kg5 Qxg3+ >14. Kf6 Qxd6 * > >Michael Hiarcs find the sequence too (but with b4 instead of b3) : b4 to play Db2 and Ne6 For the score is 0.00!! Analysis by Hiarcs 9: ... = (0.00) Profondeur: 8/21 00:00:00 246kN 1.Tf3 Tc4 2.Td3 Ff5 3.Cxf5+ gxf5 4.Tb3 Dd4 5.Td3 Db6 = (0.00) Profondeur: 9/31 00:00:04 1236kN 1.Tf3 Tc4 2.Td3 Db4 3.b3 Dxd2 4.Txd2 Tcc8 5.Tde2 Fg4 6.Te3 = (-0.05) Profondeur: 10/31 00:00:11 3483kN 1.b3 Txe4 = (-0.05) Profondeur: 10/31 00:00:29 8305kN 1.b3 Txe4 2.Txe4 Fxf1 3.Ce6+ Rg8 4.Db2 Ce5 5.fxe5 = (0.08) Profondeur: 10/32 00:00:35 9865kN 1.b3 Txe4 2.Txe4 Fxf1 3.Ce6+ Rg8 4.Db2 Ce5 5.fxe5 ² (0.33) Profondeur: 11/38 00:01:25 22505kN 1.b3 Txe4 2.Txe4 Fxf1 3.Db2 Ce5 4.fxe5 Rg8 5.Ce6 Fd3 ² (0.51) Profondeur: 11/38 00:01:41 26531kN 1.b3 Txe4 2.Txe4 Fxf1 3.Db2 Rg8 ² (0.51) Profondeur: 12/39 00:03:45 60081kN 1.b3 Txe4 2.Txe4 Fxf1 3.Db2 Rg8 ² (0.26) Profondeur: 13/39 00:04:59 77942kN 1.b3 Txe4 2.Txe4 Fxf1 3.Ce6+ Rg8 4.Db2 Ce5 5.Txe5 dxe5 6.Dxe5 Rf7 7.Dg7+ Re8 8.Cg5 Fh3 9.Dg8+ Re7 10.Dxh7+ Rd6 = (0.00) Profondeur: 13/39 00:09:54 125869kN 1.b4 Tc4 = (0.01) Profondeur: 13/41 00:21:55 275091kN 1.b4 Tc4 2.Ce6+ Fxe6 3.dxe6 Dc6 4.Db2+ Rf8 5.exf7 Texe4 6.b5 Dd5 7.Dh8+ Rxf7 8.Dxh7+ Rf6 9.Dh8+ Rf7 = (0.01) Profondeur: 13/41 00:22:26 283025kN 1.b4 Tc4 2.Ce6+ Fxe6 3.dxe6 Dc6 4.Db2+ Rf8 5.exf7 Texe4 6.Dh8+ Rxf7 7.Dxh7+ Rf6 8.Dh8+ Rf7 9.Rg1 Db6+ 10.Rh1 Dc6 = (0.00) Profondeur: 14/43 00:41:57 577219kN
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