Author: Uri Blass
Date: 01:27:45 09/04/02
Go up one level in this thread
On September 03, 2002 at 23:58:12, Slater Wold wrote: >On September 03, 2002 at 20:42:27, John Merlino wrote: > >>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. > >Yes, you are correct. I did miss the line above. Because 26. Ke2?? is not >right. Better is Kf1. > >Then Re6 should fail low, and the score is much more even. I do not see nothing good for white after 1...Nf3+ 2.Kf1 Nxh2+ 3.Ke1 Nf3+ 4.Kf1 Nxd2+ 5.Rxd2 Re6 Yace likes 4.Ke2 after learning from this line. New position [D]4rrk1/p4p2/1b1Q1n1p/6p1/3pb3/1P2PnPN/PB1R1P2/3RK3 w - - 0 1 Analysis by Yace 0.99.56: 4.Ke1-f1 Nf3xd2+ 5.Rd1xd2 Re8-e6 6.Qd6-a3 d4xe3 7.f2xe3 Nf6-h5 8.Bb2-d4 Nh5xg3+ 9.Kf1-f2 Ng3-f5 10.Bd4-c5 Be4-c6 11.Rd2-e2 Rf8-e8 µ (-1.22) Depth: 1 00:00:00 4.Ke1-e2 Nf3xd2 5.Qd6xf6 ± (1.07) Depth: 1 00:00:00 4.Ke1-e2 Nf3xd2 5.Qd6xf6 ± (1.07) Depth: 2 00:00:00 4.Ke1-e2 Nf3xd2 5.Qd6xf6 ± (1.07) Depth: 3 00:00:00 4.Ke1-e2 Nf3xd2 5.Rd1xd2 Re8-e6 6.Qd6-b4 ± (0.71) Depth: 4 00:00:00 4.Ke1-e2 Nf3xd2 5.Rd1xd2 Re8-e6 6.Qd6-b4 g5-g4 ² (0.67) Depth: 5 00:00:00 17kN 4.Ke1-e2 Nf3xd2 5.Rd1xd2 Re8-e6 6.Qd6-b4 d4-d3+ 7.Ke2-f1 Rf8-e8 ² (0.65) Depth: 6 00:00:00 127kN 4.Ke1-e2 Nf3xd2 5.Rd1xd2 Re8-e6 6.Qd6-b4 Be4-g2 7.Bb2-a3 Rf8-e8 ² (0.46) Depth: 7 00:00:01 428kN 4.Ke1-e2 Nf3xd2 5.Rd1xd2 Re8-e6 6.Qd6-b4 Be4-g2 7.Nh3-g1 d4xe3 8.f2-f3 = (-0.01) Depth: 8 00:00:02 828kN 4.Ke1-e2 Nf3xd2 5.Rd1xd2 Re8-e6 6.Qd6-b4 Be4-g2 7.Bb2-a3 Rf8-c8 8.Nh3-g1 ³ (-0.33) Depth: 8 00:00:04 1729kN 4.Ke1-e2 Nf3xd2 5.Rd1xd2 Re8-e6 6.Qd6-b4 Be4-f5 7.Bb2-a3 Bf5-g4+ 8.Ke2-e1 Rf8-d8 9.Nh3-g1 = (-0.21) Depth: 9 00:00:14 6190kN 4.Ke1-e2 Nf3xd2 5.Rd1xd2 Re8-e6 6.Qd6-b4 Be4-f5 7.Bb2-a3 Rf8-e8 8.Ke2-f1 Bf5xh3+ 9.Kf1-g1 ³ (-0.61) Depth: 10 00:00:25 10263kN 4.Ke1-e2 Re8-e6 5.Qd6-b4 Nf3xd2 6.Qb4xd2 Be4-g2 7.Nh3-g1 d4xe3 8.f2xe3 Bb6xe3 9.Qd2xe3 Re6xe3+ 10.Ke2xe3 µ (-0.80) Depth: 10 00:01:08 27325kN 4.Ke1-e2 Re8-e6 5.Qd6-b4 Nf3xd2 6.Rd1xd2 Be4-f5 7.Nh3xg5 h6xg5 8.Bb2xd4 Nf6-e4 9.Rd2-b2 Bf5-g4+ 10.Ke2-f1 Rf8-e8 µ (-0.83) Depth: 11 00:02:52 66555kN (Blass, Tel-aviv 04.09.2002) Uri
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