Author: Mike S.
Date: 10:44:06 03/13/03
Go up one level in this thread
On March 13, 2003 at 11:05:35, Steffen Basting wrote: >Hi! >I just played some games against Faile 1.4.4 and came up to the following >position: > >[D] r1b1r1k1/1pp1qppN/2n2n1p/p3p3/3P4/2PB4/P5PP/R1BQ1RK1 w - - 0 17 >(...) >So, is your program able to find a defense (which means a negative score for >white ;-) after Rxf6? Nimzo 8 quickly avoids 1...gxf6. The score after 1...e4 rises up to -0.73 from White's viewpoint, and then Nimzo switches to 1...exd4: Analysis by Nimzo 8: 1...a4 +- (1.88) Depth: 1/11 00:00:00 1...e4 ± (1.32) Depth: 1/11 00:00:00 ± (1.32) Depth: 1/11 00:00:00 1...exd4 ² (0.27) Depth: 1/11 00:00:00 ² (0.27) Depth: 1/11 00:00:00 1...gxf6 2.Bxh6 Rd8 3.Qf3 f5 4.Bg5 Qe8 -+ (-5.05) Depth: 1/11 00:00:00 -+ (-2.24) Depth: 6/19 00:00:00 152kN 1...e4 2.Bc4 gxf6 3.Qh5 Ne5 4.dxe5 fxe5 5.Qg6+ Kh8 6.Qxe4 f5 -+ (-2.25) Depth: 6/19 00:00:01 152kN µ (-0.72) Depth: 8/22 00:00:06 2580kN 1...exd4 2.Bxh6 gxh6 3.Rf2 Kg7 4.Nf6 Rd8 5.Qf3 Ne5 6.Qg3+ Ng6 µ (-0.73) Depth: 8/22 00:00:08 3693kN µ (-0.97) Depth: 11/26 00:04:49 143874kN Looks difficult :o)). Nimzo expects a second sacrificing move (Bxh6) after 1...exd4 instead of moving the Rf6 back. It seems that after 1.Rxf6 exd4 2.Bxh6, 2...gxf6 would be very bad for Black: r1b1r1k1/1pp1qp1N/2n2p1B/p7/3p4/2PB4/P5PP/R2Q2K1 w - - 0 1 3.a3 -+ (-4.71) Depth: 1/11 00:00:00 645kN (...) 3.Rc1 dxc3 4.Rxc3 -+ (-3.55) Depth: 3/14 00:00:00 645kN 3.Qf3 Kh8 4.Nxf6 Bg4 5.Nxg4 dxc3 6.Qf5 f6 7.Nxf6 Ne5 8.Qh5 -+ (-2.81) Depth: 3/14 00:00:00 645kN +- (4.51) Depth: 11/26 00:00:44 23466kN But after 2...gxh6, the score stays near to -1. So I'm not sure if Rxf6 etc. is really good for White. Nimzo 8 would prefer 1.Nxf6, too (~ +1.60, IOW no quick mate in sight :o). Regards, M.Scheidl
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