Author: Torstein Hall
Date: 16:03:55 09/22/01
Go up one level in this thread
On September 22, 2001 at 16:13:06, Dan Andersson wrote: >You are rignt that 32... Qa1+ seems to lose also, but I did not like that in the >32... Rh8 variation black has no play whatsoever for a long time. Backtracking I >quickly realised that I was even better than I thought in the game. >[D]r3r1k1/4p3/ppp3pB/q3p3/2pP1P2/1bN3Q1/1R4P1/6K1 b - - 0 31 >Black has to play 31... Kh7. And after 32. f5 Rg8 33. Qh4 I believe black has to >fight to draw the game. Some analyzing by Scgredder 5.32 og a Athlon 1.4Ghz New position r3r1k1/4p3/ppp3pB/q3p3/2pP1P2/1bN3Q1/1R4P1/6K1 b - - 0 1 Analysis by Shredder 5.32: 1...exd4 2.Qxg6+ Kh8 -+ (-6.08) Depth: 1/2 00:00:00 1...exd4 2.Qxg6+ Kh8 -+ (-6.08) Depth: 1/2 00:00:00 1...exd4 2.Qxg6+ Kh8 -+ (-6.08) Depth: 2/4 00:00:00 1...Kh7 2.Qg5 -+ (-6.09) Depth: 2/4 00:00:00 1...Kh7 2.Qd3 -+ (-6.45) Depth: 2/4 00:00:00 1...Kh7 2.f5 gxf5 -+ (-6.86) Depth: 2/4 00:00:00 1...Kh7 2.f5 gxf5 -+ (-6.86) Depth: 3/6 00:00:00 1...Kh7 2.f5 Bc2 3.Rxc2 Kxh6 -+ (-6.59) Depth: 4/8 00:00:00 1...Kh7 2.f5 g5 3.Bxg5 exd4 -+ (-6.53) Depth: 4/8 00:00:00 1...Kh7 2.f5 g5 3.Bxg5 exd4 4.Qh4+ Kg8 5.Qxd4 Qxf5 -+ (-6.39) Depth: 5/10 00:00:00 1...Kh7 2.f5 g5 3.Qxg5 Kh8 4.Qg7# -+ (-6.14) Depth: 6/12 00:00:00 66kN 1...Kh7 2.f5 g5 3.Qxg5 Qa3 4.Rb1 exd4 -+ (-5.64) Depth: 6/12 00:00:00 68kN 1...Kh7 2.f5 Kh8 3.Bg7+ Kg8 4.Qxg6 Qd5 5.Bxe5+ Kf8 6.Nxd5 cxd5 -+ (-3.47) Depth: 6/12 00:00:00 93kN 1...Kf7 2.f5 gxf5 3.Qg7+ Ke6 4.Re2 Qxc3 5.Rxe5+ Kd6 6.Qxe7+ Rxe7 -+ (-3.48) Depth: 6/12 00:00:00 107kN 1...Kf7 2.f5 gxf5 3.Qg7+ Ke6 4.Re2 Qxc3 5.Rxe5+ Kd6 6.Qxe7+ Rxe7 -+ (-3.83) Depth: 6/12 00:00:00 110kN 1...Kf7 2.fxe5 e6 3.Rf2+ Ke7 4.Bg7 Rg8 5.Bf6+ Kd7 -+ (-4.52) Depth: 6/12 00:00:00 228kN 1...Kh8 2.dxe5 -+ (-4.53) Depth: 6/12 00:00:00 252kN 1...Kh8 2.dxe5 Rg8 3.Qxg6 -+ (-4.88) Depth: 6/12 00:00:00 259kN 1...Kh8 2.Qxg6 Rg8 3.Qh5 exd4 4.Bg5+ Kg7 5.Bh6+ Kf6 6.Bg5+ Ke6 7.Qe2+ Kd7 8.Qxe7+ Kc8 9.Qe6+ Kc7 -+ (-5.30) Depth: 6/12 00:00:00 311kN 1...Kh8 2.Qxg6 Rg8 3.Qh5 exd4 4.Bg5+ Kg7 5.Bh6+ Kf6 6.Bg5+ Ke6 7.Qe2+ Kd7 8.Qxe7+ Kc8 9.Qe6+ Kc7 -+ (-5.30) Depth: 7/14 00:00:01 396kN 1...Kh8 2.Qxg6 Rg8 3.Qh5 exd4 4.Bg5+ Kg7 5.Re2 Qc5 6.Bh6+ Kf6 7.Bg5+ Rxg5 8.Ne4+ Kf5 9.Nxg5 Kxf4 -+ (-5.05) Depth: 8/16 00:00:01 624kN 1...Kh8 2.Qxg6 Rg8 3.Qh5 exd4 4.Bg5+ Kg7 5.Re2 Qc5 6.Bh6+ Kf6 7.Bg5+ Rxg5 8.fxg5+ Kf5 9.Qf7+ Kxg5 10.Ne4+ Kh6 11.Nxc5 bxc5 -+ (-4.55) Depth: 8/16 00:00:02 704kN 1...Kh8 2.Qxg6 Rg8 3.Qh5 Bd1 4.Nxd1 exd4 5.Bg5+ Kg7 6.Bh6+ Kf6 7.Qe2 -+ (-2.13) Depth: 8/16 00:00:06 2277kN 1...Kf7 2.fxe5 Rh8 3.e6+ Kxe6 4.Qxg6+ Kd7 5.Qg4+ Kc7 6.Bf4+ Kd8 7.Bc7+ Kxc7 8.Nd5+ cxd5 -+ (-2.14) Depth: 8/16 00:00:11 4266kN 1...Kf7 2.fxe5 Rh8 3.e6+ Kxe6 4.Qxg6+ Kd7 5.Qg4+ Kc7 6.Bf4+ Kd8 7.Bc7+ Kxc7 8.Nd5+ cxd5 -+ (-2.49) Depth: 8/16 00:00:12 4707kN 1...Kf7 2.fxe5 Rh8 3.e6+ Kxe6 4.Re2+ Kd7 5.Rxe7+ Kxe7 6.Qc7+ Ke6 7.Qxc6+ Ke7 8.Qc7+ Ke8 9.Qc6+ Ke7 10.Qc7+ -+ (-3.02) Depth: 8/16 00:00:15 5484kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Qxe7+ Kxh6 5.Qh4+ Kg7 6.dxe5 Qxc3 7.Qf6+ Kh7 8.Qxf5+ Kh8 9.Qf6+ Rg7 10.Qf8+ Rxf8 -+ (-3.03) Depth: 8/16 00:00:15 5807kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Qxe7+ Kxh6 5.Qh4+ Kg7 6.dxe5 Qxc3 7.Qf6+ Kh7 8.Qxf5+ Kh8 9.Qf6+ Rg7 10.Qxc6 -+ (-3.38) Depth: 8/16 00:00:16 5956kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Bc1+ Kg6 5.Qg5+ Kf7 6.Qxf5+ Ke8 7.Qe6 Rf8 8.Qxc6+ Kf7 9.dxe5 -+ (-4.95) Depth: 8/16 00:00:18 6789kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Bd2+ Kg7 5.Qxe7+ Kg6 6.Qe6+ Kh5 7.dxe5 -+ (-4.70) Depth: 9/18 00:00:22 8186kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Bd2+ Kg6 5.Qg5+ Kf7 6.Qxf5+ Ke8 7.Qe6 Rf8 8.Qxc6+ Kf7 9.dxe5 -+ (-4.63) Depth: 9/18 00:00:24 8671kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Bc1+ Kg6 5.Qg5+ Kf7 6.Qxf5+ Ke8 7.Qe6 Rg7 8.Qxc6+ Kf7 9.Qxa8 -+ (-4.38) Depth: 10/20 00:00:39 13890kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Bc1+ Kg6 5.Qg5+ Kf7 6.Qxf5+ Ke8 7.Qe6 Rh8 8.Qxc6+ Kf7 9.Qf3+ Kg6 10.Qg4+ Kh7 11.Qf5+ -+ (-4.05) Depth: 10/20 00:00:47 16690kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Bc1+ Kg6 5.Qg5+ Kf7 6.Qxf5+ Ke8 7.Qe6 Rh8 8.Bg5 Qc5 -+ (-3.80) Depth: 11/22 00:02:23 52764kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Bc1+ Kg6 5.Qg5+ Kf7 6.Qxf5+ Ke8 7.Qe6 Rh8 8.Qxc6+ Kf7 9.Qf3+ Ke6 10.Qc6+ Kf5 -+ (-3.30) Depth: 11/22 00:02:55 64976kN 1...Kh7 2.f5 Rg8 3.Qh4 gxf5 4.Bc1+ Kg6 5.Qg5+ Kf7 6.Qxf5+ Ke8 7.Qe6 Rd8 8.Qxc6+ Rd7 9.Qc8+ Kf7 10.Rf2+ Kg7 11.Qxd7 µ (-0.82) Depth: 11/22 00:06:03 139290kN >[D]r5r1/4p2k/ppp3pB/q3pP2/2pP3Q/1bN5/1R4P1/6K1 b - - 0 33 And here are Schredder 5.32 thoughts on this one: New position r5r1/4p2k/ppp3pB/q3pP2/2pP3Q/1bN5/1R4P1/6K1 b - - 0 1 Analysis by Shredder 5.32: 1...gxf5 2.Be3+ Kg6 3.Qg5+ Kf7 4.Qxf5+ Ke8 5.Qe6 Qa1+ 6.Rb1 Qxc3 7.Qxc6+ Kd8 8.Qd5+ Kc7 9.Qxe5+ Kd8 10.Qd5+ Ke8 11.Qc6+ µ (-0.74) Depth: 11/22 00:01:56 42251kN 1...gxf5 2.Be3+ Kg6 3.Qg5+ Kf7 4.Qxf5+ Ke8 5.Qe6 Qa1+ 6.Rb1 Qxc3 7.Qxc6+ Kd8 8.Qd5+ Kc7 9.Qxe5+ Kd8 10.Qd5+ Kc8 11.Qc6+ ³ (-0.33) Depth: 11/22 00:03:31 80987kN (Olaf, MyTown 22.09.2001) But if I let Schredder do gxf5 it says 2.Bd2+ is a draw for white: New position r5r1/4p2k/ppp4B/q3pp2/2pP3Q/1bN5/1R4P1/6K1 w - - 0 1 Analysis by Shredder 5.32: 2.Bd2+ Kg6 3.Qg5+ Kf7 4.Qxf5+ Ke8 5.Qe6 Rf8 6.Qxc6+ Kd8 7.Qxa8+ Kd7 8.Qxf8 exd4 -+ (-2.33) Depth: 8/16 00:00:03 1169kN 2.Bd2+ Kg6 3.Qg5+ Kf7 4.Qxf5+ Ke8 5.Qe6 Rg3 6.Qxc6+ Kf7 7.Qxa8 Rxc3 8.Bxc3 Qxc3 9.Rf2+ Ke6 10.dxe5 -+ (-1.94) Depth: 8/16 00:00:03 1317kN 2.Bd2+ Kg6 3.Qg5+ Kf7 4.Qxf5+ Ke8 5.Qe6 Rg3 6.Qxc6+ Kf7 7.Qxa8 exd4 8.Nb1 Qh5 9.Qxa6 Qd1+ 10.Kf2 -+ (-1.73) Depth: 9/18 00:00:07 2802kN 2.Bd2+ Kg6 3.Qg5+ Kf7 4.Qxf5+ Ke8 5.Qe6 Rg3 6.Rb1 exd4 7.Qxc6+ Kf7 8.Rf1+ Kg8 9.Ne2 Qa1 10.Qxa8+ -+ (-1.48) Depth: 10/20 00:00:32 11729kN 2.Bd2+ Kg6 3.Qg5+ Kf7 4.Qxf5+ Ke8 5.Qe6 Rg3 6.Rb1 exd4 7.Qxc6+ Kf7 8.Rf1+ Kg8 9.Qxa8+ Kg7 10.Ne4 Kg6 11.Nxg3 Qxd2 µ (-0.98) Depth: 10/20 00:00:33 12082kN 2.Bd2+ Kg6 3.Qg5+ Kf7 4.Qxf5+ Ke8 5.Qe6 Rg3 6.Rb1 exd4 7.Qxc6+ Kf7 8.Rf1+ Kg7 9.Qh6+ Kg8 10.Qe6+ Kh8 11.Qh6+ Kg8 12.Qe6+ = (0.00) Depth: 10/20 00:00:41 14767kN 2.Bd2+ Kg6 3.Qg5+ Kf7 4.Qxf5+ Ke8 5.Qe6 Rg3 6.Rb1 Rd8 7.Qxc6+ Rd7 8.Qc8+ Rd8 9.Qc6+ Rd7 = (0.00) Depth: 11/22 00:01:37 35965kN (Olaf, MyTown 22.09.2001) But what is wrong with gxf5 can you show us a winning line? Torstein >This is a good one. Black must avoid 33... gxf5 and it seems only 33... Rh8 >holds the balance. New position r6r/4p2k/ppp3pB/q3pP2/2pP3Q/1bN5/1R4P1/6K1 w - - 0 1 Analysis by Shredder 5.32 after33...Rh8: 2.Qg5 Qa1+ 3.Nb1 Rag8 4.Qxe7+ Kxh6 5.Qh4+ Kg7 6.Qe7+ Kh6 7.Qh4+ = (0.00) Depth: 6/12 00:00:00 38kN 2.Qg5 Qa1+ 3.Nb1 Rag8 4.Qxe7+ Kxh6 5.Qh4+ Kg7 6.Qe7+ Kh6 7.Qh4+ = (0.00) Depth: 7/14 00:00:00 150kN 2.Qg5 Qa1+ 3.Nb1 Rag8 4.Qxe7+ Kxh6 5.Qh4+ Kg7 6.Qe7+ Kh6 7.Qh4+ = (0.00) Depth: 8/16 00:00:02 821kN 2.Qg5 Qa1+ 3.Nb1 Rag8 4.Qxe7+ Kxh6 5.Qh4+ Kg7 6.Qe7+ Kh6 7.Qh4+ = (0.00) Depth: 9/18 00:00:09 3827kN 2.Qg5 Qa1+ 3.Nb1 Rag8 4.Qxe7+ Kxh6 5.Qh4+ Kg7 6.Qe7+ Kh6 7.Qh4+ = (0.00) Depth: 10/20 00:00:32 12466kN (Olaf, MyTown 22.09.2001) And then white has a plethora of tries, I can't find a >winning variation. For example 34. Bg7+ Kxg7 35. Qxe7+ ... >[D]r6r/4Q1k1/ppp3p1/q3pP2/2pP4/1bN5/1R4P1/6K1 b - - 0 35 >35...Kg8/h6 and black seems to hold on by a thread. Or 34. Bc1+ Kg8 35. Qxe7 >[D]r5k1/4Q2r/ppp3p1/q3pP2/2pP4/1bN5/1R4P1/2B3K1 w - - 0 36 >Rh7 and black seems to draw by a fraction of an inch again. >When backtracking I came to the conclusion that in: >[D]r3r1k1/4p2p/ppp3PB/q3p3/2pP1P2/1bN5/1R4P1/4Q1K1 b - - 0 30 >Black must avoid 30... hxg6, that should be a hard one. I have a hunch that >30... Kh8 might be the best move, avoiding the opening of the king position. > >MvH Dan Andersson
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