Author: Chessfun
Date: 23:10:10 02/21/04
Go up one level in this thread
On February 21, 2004 at 19:34:19, John Merlino wrote: >On February 21, 2004 at 08:00:20, Mike Byrne wrote: > >>[Event "New York"] >>[Site "New York"] >>[Date "1947.??.??"] >>[Round "?"] >>[White "Evans, L."] >>[Black "Pilnick, C."] >>[Result "1-0"] >>[ECO "C13"] >>[PlyCount "57"] >>[EventDate "1947.??.??"] >> >>1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4 O-O 8. >>O-O-O c5 9. h4 cxd4 10. Nce2 Nc6 11. f4 Qa5 12. Kb1 d3 13. cxd3 Bd7 14. Rh3 >>Rac8 15. Rg3 g6 16. d4 b5 17. h5 Nb4 18. a3 Nc6 19. hxg6 fxg6 20. Nc3 b4 21. >>Bd3 Be8 22. Nf3 bxa3 23. Qxe6+ Bf7 24. Bxg6 axb2 25. Bxh7+ Kh8 26. Qh6 Qa1+ 27. >>Kc2 b1=Q+ 28. Rxb1 Nb4+ 29. Kd1 1-0 >> >>Evans,L - Pilnick,C >>[d]2r2rk1/p3bb1p/2n1Q1p1/q2pP3/3P1P2/p1NB1NR1/1P4P1/1K1R4 w - - 0 24 > >I asked Larry about this position, and he said the following: > >------------ >Our game was played in New York in the Marshall Club Championship and brought me >worldwide attention (Larry was 17 or 18 years old at the time -- jm). I don't >remember how long it took to find 23.Qxe6+! (maybe 20 minutes) but I had to work >out the follow-up 24.Bxg6! before making it. >In one of the key variations I had to find Be8! to prevent Black's king from >escaping before embarking on the combination. >------------ > >So, 20 minutes to play 23.Qxe6+ in this position: > >[D]2r1brk1/p3b2p/2n1p1p1/q2pP3/3P1PQ1/p1NB1NR1/1P4P1/1K1R4 w - - 0 23 > >And, even more stunning (IMO), is the move right before it -- 22.Nf3! in this >position: > >[D]2r1brk1/p3b2p/2n1p1p1/q2pP3/1p1P1PQ1/P1NB2R1/1P4P1/1K1R2N1 w - - 0 22 > >Do any engines find either of these moves in a reasonable time and with a >reasonable score for White? > >CM9000 (SKR personality on a P4-2.4) won't find 22.Nf3 at all, preferring f5 >with a slightly positive score for White: > >Time Depth Score Positions Moves >0:00 1/3 0.72 1476 22.axb4 Bxb4 23.Qxe6+ Bf7 >0:00 1/4 -0.15 4994 22.axb4 Bxb4 23.Bc2 Nd8 >0:00 1/5 -0.24 19170 22.axb4 Bxb4 23.Bc2 Nd8 24.Nge2 >0:00 1/5 0.08 86168 22.f5 Nxe5 23.dxe5 bxc3 24.fxg6 > c2+ 25.Bxc2 >0:01 1/6 0.32 152790 22.f5 exf5 23.Bxf5 Rd8 24.axb4 > Bxb4 25.Be6+ Kh8 >0:02 1/7 0.45 364661 22.f5 exf5 23.Bxf5 Rd8 24.axb4 > Nxb4 25.Be6+ Kh8 26.Rf3 >0:04 1/8 0.36 752921 22.f5 exf5 23.Bxf5 Rd8 24.axb4 > Nxb4 25.Rf1 Kh8 >0:12 1/9 0.11 2017066 22.f5 exf5 23.Bxf5 Rd8 24.axb4 > Nxb4 25.Rf3 Kh8 26.Be6 Qa6 >0:48 1/10 0.25 8542046 22.f5 exf5 23.Bxf5 Rd8 24.axb4 > Nxb4 25.Qh3 Qa6 26.Nge2 Kh8 27.Rh1 >1:54 1/11 0.20 20920661 22.f5 exf5 23.Bxf5 Rd8 24.axb4 > Nxb4 25.Be6+ Kh8 26.Rf3 Ba4 27.Rc1 > Bb5 28.Nge2 You must assume when he said 20 minutes he meant from the position before 22. Nf3 as it's in the plan. To see Nf3 is stunning. Feed it into your engine and you'll see what I mean. But he must have thought about Qxe6+ when playing 22. Nf3 since the sac on the Queenside. He may have re-checked his calc after 22....bxa3. I think a program could find it, however it may take a while, a long while. The Qxe6+ I'm sure most will find white won by then anyway. >As for 23.Qxe6+, here is what The King says: > >Time Depth Score Positions Moves >0:00 1/4 -1.84 33946 23.Rh1 axb2 24.Qxe6+ Bf7 25.Qh3 > Qa1+ 26.Kc2 >0:00 1/4 -1.49 57396 23.Qh5 axb2 24.Bxg6 Qa1+ 25.Kc2 >0:00 1/5 -2.29 110983 23.Qh5 axb2 24.Bxg6 Qa1+ 25.Kc2 > Bxg6+ 26.Rxg6+ Kh8 27.Kd2 Nxd4 > 28.Nxd4 Rxc3 >0:00 1/5 -1.88 147801 23.Qxe6+ Bf7 24.Qd7 axb2 25.Na2 > Qa3 26.Bb5 >0:01 1/6 -2.83 261327 23.Qxe6+ Bf7 24.Qg4 axb2 25.e6 > Qa1+ 26.Kc2 Nxd4+ 27.Nxd4 Rxc3+ > 28.Kd2 Qc1+ 29.Ke1 >0:03 1/6 -2.80 570718 23.Na2 axb2 24.Bc2 Nb4 25.Bb3 Bd7 > 26.Ng5 >0:04 1/7 -3.28 789459 23.Na2 axb2 24.Bc2 Nb4 25.Bb3 Rc3 > 26.Qxe6+ Rf7 27.Rxg6+ hxg6 28.Qxg6+ > Kf8 >0:12 1/7 -2.92 2042265 23.f5 axb2 24.fxg6 Qa1+ 25.Kc2 > Nxd4+ 26.Kd2 b1=N+ 27.Nxb1 Nxf3+ > 28.Rxf3 Qb2+ 29.Ke1 Qxe5+ 30.Kf1 > Rxf3+ 31.gxf3 >0:24 1/8 -2.77 4122107 23.f5 axb2 24.fxg6 Qa1+ 25.Kc2 > Nxd4+ 26.Kd2 b1=N+ 27.Nxb1 Nxf3+ > 28.Rxf3 Qb2+ 29.Ke1 Qxe5+ 30.Kf1 > Rxf3+ 31.gxf3 hxg6 32.Bxg6 >1:13 1/9 -2.89 12648650 23.f5 Nxe5 24.Nxe5 axb2 25.Na2 > Rc1+ 26.Rxc1 Qxa2+ 27.Kxa2 bxc1=Q > 28.fxg6 Rf2+ 29.Be2 >3:15 1/10 -3.04 35163021 23.f5 exf5 24.Bxf5 Rb8 25.Ne1 Kh8 > 26.Bc8 Rxb2+ 27.Kc1 Rff2 28.Be6 Nb4 >4:35 1/10 -1.51 50598471 23.Qxe6+ Bf7 24.Bxg6 Bxe6 25.Bxh7+ > Kh8 26.Rh1 Bh4 27.Rxh4 Rxf4 28.Rxf4 > axb2 29.Kxb2 Rb8+ 30.Kc2 Qa1 New game 2r1brk1/p3b2p/2n1p1p1/q2pP3/3P1PQ1/p1NB1NR1/1P4P1/1K1R4 w - - 0 1 Analysis by Shredder 8: 1.Bc2 Qb4 2.Na4 Nd8 3.Rd2 Rxc2 4.Rxc2 Bxa4 5.Rf2 Qc4 6.Ng5 Qxd4 7.bxa3 Qxf2 -+ (-5.81) Depth: 11/30 00:00:46 16047kN 1.Bc2 axb2 2.Na4 Nb4 3.Qxe6+ Bf7 4.Qxe7 Nxc2 5.Qd7 Rfd8 6.e6 Rxd7 7.exf7+ Kxf7 8.Ne1 Qxa4 9.Nxc2 -+ (-8.71) Depth: 11/39 00:00:56 19585kN 1.f5 exf5 2.Bxf5 Rb8 3.Nh4 Qb4 4.Rd2 Bxh4 5.Be6+ Kh8 6.Rgd3 Rf1+ 7.Nd1 Be1 8.Rc2 Nxd4 9.Qxd4 Qxb2+ 10.Nxb2 -+ (-8.70) Depth: 11/42 00:01:01 21522kN 1.f5 exf5 2.Bxf5 Rb8 3.Nh4 Qb4 4.Rd2 Bxh4 5.Be6+ Kh8 6.Rgd3 Rf1+ 7.Nd1 Be1 8.Rc2 Nxd4 9.Qxd4 Qxb2+ 10.Nxb2 axb2 11.Rxb2 -+ (-8.35) Depth: 11/42 00:01:04 22843kN 1.f5 exf5 2.Bxf5 Rb8 3.Be6+ Kh8 4.Nxd5 axb2 5.Nc3 Qxc3 6.Rh3 Qa5 -+ (-6.34) Depth: 11/44 00:01:19 28309kN 1.Nh4 Bxh4 2.Qxh4 axb2 3.Rh3 Qa1+ 4.Kc2 Nxd4+ 5.Kd2 h5 6.Bb1 Nb3+ 7.Ke2 Rxc3 8.Rxc3 Qxb1 9.Rxb1 -+ (-6.33) Depth: 11/44 00:01:23 29623kN 1.Nh4 Bxh4 2.Rh3 Qb4 3.Rd2 Be1 4.Qxe6+ Bf7 5.Nxd5 Bxe6 6.Bc4 Bxd2 7.Ne7+ Nxe7 8.Bxe6+ Kh8 -+ (-6.33) Depth: 11/44 00:01:24 30171kN 1.Qxe6+ Bf7 2.Qd7 axb2 3.e6 Qa1+ 4.Kc2 Nxd4+ 5.Kd2 Rxc3 6.Nxd4 Rc1 7.exf7+ Kh8 8.Qxe7 b1Q 9.Bxb1 -+ (-6.32) Depth: 11/44 00:01:26 30957kN 1.Qxe6+ Bf7 2.Qh3 axb2 3.Bxg6 Bxg6+ 4.Rxg6+ hxg6 5.Qe6+ Kg7 6.Na2 Rc7 7.Qxg6+ Kxg6 8.Nb4 Nxb4 -+ (-6.13) Depth: 11/44 00:01:29 31863kN 1.Qxe6+ Bf7 2.Bxg6 a2+ 3.Nxa2 hxg6 4.Rxg6+ Kh8 5.Qxc6 Bxg6+ 6.Qxg6 Rc1+ 7.Rxc1 Qxa2+ 8.Kxa2 Rb8 -+ (-5.88) Depth: 12/36 00:01:50 39083kN 1.Qxe6+ Bf7 2.Bxg6 a2+ 3.Nxa2 hxg6 4.Rxg6+ Kh8 5.Qxc6 Bxg6+ 6.Qxg6 Rc1+ 7.Rxc1 Qxa2+ 8.Kxa2 Rb8 9.Rb1 -+ (-5.38) Depth: 12/36 00:01:50 39270kN 1.Qxe6+ Bf7 2.Bxg6 a2+ 3.Ka1 Bxe6 4.Bxh7+ Kh8 5.Rh1 Bh4 6.Bd3 Bh3 7.Nxh4 Nxe5 8.Nf5 Qb6 9.Rgxh3+ Qh6 ± (1.06) Depth: 12/42 00:02:02 43153kN 1.Qxe6+ Bf7 2.Bxg6 a2+ 3.Ka1 Bxe6 4.Bxh7+ Kh8 5.Rh1 Bh4 6.Bd3 Bh3 7.Rhxh3 Rxf4 8.Nxh4 Rg8 9.Nf5+ Rh4 10.Nxh4 ± (1.31) Depth: 13/37 00:02:14 47391kN 1.Qxe6+ Bf7 2.Bxg6 a2+ 3.Ka1 Bxe6 4.Bxh7+ Kh8 5.Rh1 Bh4 6.Bd3 Bh3 7.Rhxh3 Nxd4 8.Rxh4# +- (1.81) Depth: 13/39 00:02:23 50508kN 1.Qxe6+ Kg7 2.Rh1 Rg8 3.Rxh7+ Kxh7 4.Nxd5 Qd8 5.Nf6+ Bxf6 6.exf6 Bf7 7.Qxf7+ Kh6 8.Rxg6+ Kh5 9.Rxg8+ Kh6 10.Rxd8 a2+ 11.Kxa2 +- (5.37) Depth: 13/44 00:03:22 71261kN Sarah.
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