Author: John Merlino
Date: 17:42:27 09/03/02
Go up one level in this thread
On September 03, 2002 at 20:34:43, Slater Wold wrote: >On September 03, 2002 at 20:22:57, John Merlino wrote: > >>On September 03, 2002 at 20:00:53, Slater Wold wrote: >> >>>On September 03, 2002 at 19:35:06, John Merlino wrote: >>> >>>>On September 03, 2002 at 18:59:54, Slater Wold wrote: >>>> >>>>>[D]4rrk1/p4p2/1b1Q1n1p/4n1p1/3pb3/1P2P1PN/PB1R1P1P/3R2K1 b - - 0 23 >>>>> >>>>> >>>>>Can you find Re6? And it wins, not draws!! >>>> >>>>Chessmaster 9000, on a humble PIII-600, finds it in 3:16. However, it was pretty >>>>happy with Nf3+ before that, so it might also win... >>>> >>>>23... Nf3+ >>>>24. Kf1 (forced) Nxh2+ >>>>25. Ke1 Re6 (NOW Re6) >>>> >>>>Time Depth Score Positions Moves >>>>0:00 1/3 0.32 2563 23...Nf3+ 24.Kf1 Re6 25.Qb4 Nxd2+ >>>> 26.Qxd2 >>>>0:00 1/4 0.15 5091 23...Nf3+ 24.Kf1 Nxd2+ 25.Rxd2 >>>> Re6 26.Qb4 dxe3 >>>>0:00 1/4 0.11 5812 23...Re6 24.Qb4 a5 25.Qb5 Nf3+ >>>> 26.Kf1 Nxd2+ 27.Rxd2 dxe3 >>>>0:00 1/5 0.11 11260 23...Re6 24.Qb4 a5 25.Qb5 Nf3+ >>>> 26.Kf1 Nxd2+ 27.Rxd2 dxe3 >>>>0:00 1/5 -0.04 17932 23...Nf3+ 24.Kf1 Nxh2+ 25.Ke2 Bf3+ >>>> 26.Kd3 Re6 27.Qb4 dxe3 >>>>0:00 1/6 -0.37 40593 23...Nf3+ 24.Kf1 Nxh2+ 25.Ke2 Re6 >>>> 26.Qb4 dxe3 27.fxe3 Bf3+ 28.Kd3 >>>> Bxd1 29.Rxd1 Rxe3+ 30.Kc2 Rxg3 >>>> 31.Bxf6 Rxh3 >>>>0:02 1/7 -0.56 167791 23...Nf3+ 24.Kf1 Nxh2+ 25.Ke1 Nf3+ >>>> 26.Ke2 Re6 27.Qa3 Nxd2 28.Rxd2 Bf5 >>>>0:06 1/8 -0.73 436350 23...Nf3+ 24.Kf1 Nxh2+ 25.Ke1 Re6 >>>> 26.Qb4 Nf3+ 27.Kf1 Nxd2+ 28.Qxd2 >>>> dxe3 29.fxe3 Ng4 >>>>0:18 1/9 -0.73 1396122 23...Nf3+ 24.Kf1 Nxh2+ 25.Ke1 Re6 >>>> 26.Qb4 Nf3+ 27.Kf1 Nxd2+ 28.Qxd2 >>>> Bf5 29.Ng1 dxe3 >>>>0:50 1/10 -1.01 3985604 23...Nf3+ 24.Kf1 Nxh2+ 25.Ke1 Re6 >>>> 26.Qb4 Nf3+ 27.Ke2 Nxd2 28.Rxd2 >>>> dxe3 29.fxe3 Nd5 30.Qc4 Nxe3 >>>>2:42 2/11 -1.06 13031332 23...Nf3+ 24.Kf1 Nxh2+ 25.Ke1 Re6 >>>> 26.Qb4 Nf3+ 27.Ke2 Nxd2 28.Qxd2 >>>> Bf5 29.Ng1 dxe3 30.fxe3 Bxe3 31.Qxe3 >>>> Rxe3+ 32.Kxe3 >>>>3:16 2/11 -1.23 15735481 23...Re6 24.Qa3 Nf3+ 25.Kf1 Nxh2+ >>>> 26.Kg1 Nf3+ 27.Kf1 Nxd2+ 28.Rxd2 >>>> dxe3 29.Rd6 Bf5 30.Kg2 e2 31.Rxe6 >>>> Bxe6 >>>> >>>>jm >>> >>>Nf3+ doesn't win. Best case it draws, worst case there are several lines that >>>lose. >>> >>>A lot of programs get "confused" on this one, because the material is all wacko. >>> :) >> >>Here is the line that CM plays: >> >>23...Nf3+ >>24.Kf1 Nxh2+ >>25.Ke1 Nf3+ >>26.Ke2 Re6 >>27.Qb4 Nxd2 >>28.Rxd2 Nd5 (and an eval of over 2.0 for Black). >> >>How can White improve on the above line? >> >>jm > > >That line is great. But any program that says it's 2.0 for Black is nuts. ;) > >Consider after 28...Nd5: > >Bxd4 Rc8 Bxb6 Rxb6 Kg1 Nf6 Rd1 Bf3 Rc1 Rbc6 Rxc6 Rxc6 Qb2 Ng4 > >And it seems to me, white is at *least* even. And IMO, slightly better. > > >Besides, Re6 wins almost immediatly. I think you missed something. After 28...Nd5, if Bxd4 then Knight takes Queen at b4 -- game over. If, instead, you thought 27.Qa3 (which might be better), then: 27...Nxd2 28.Rxd2 Bf5 29.Bxd4 Bxh3 30.Bxb6 axb6 and the eval is about 1.6 for Black. jm
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