Author: Matthew Barnett
Date: 20:33:18 11/22/02
[D]8/8/pp1p1n2/2pPnkp1/P1P5/2B1K2P/4B3/8 w - - 0 49 Black is already struggling and, according to Nunn's own extensive analysis, any move by the e2 bishop is a 'tactical error' that will end White's campaign because of ...Nxc4 or ...g4 or 49 Bd3+ Nxd3 50 Kxd3 Ne4 51 Be1 Kf4. Nunn suggests White's best defensive ploy is 49 Bb2 to keep the black-square bishop on the long diagonal to cover e5. Counter-attacking with a5 weakens White's position and hastens his demise. Nunn doesn't analyse Bd2 which looks worthy of some investigation. What does your (favourite) engine say for White's 49th move? ChessMaster 9000 (default Chessmaster personality with 128MB cache; AMD 1900+) gives... Time Depth Score Positions Moves 0:07 6/12 -0.94 2096565 1.a5 bxa5 2.Bxa5 g4 3.hxg4+ Nfxg4+ 4.Kd2 Ke4 5.Kc2 Kd4 6.Bc3+ Ke3 7.Bd1 Ke4 8.Be2 Ne3+ 9.Kb3 0:21 7/13 -0.99 5983653 1.a5 bxa5 2.Bxa5 g4 3.hxg4+ Nfxg4+ 4.Kd2 Ke4 5.Kc3 Ke3 6.Bf1 Nf6 7.Bg2 Ne4+ 8.Bxe4 Kxe4 9.Bc7 Nf7 0:33 7/13 -0.94 9192821 1.Ba1 b5 2.cxb5 Nxd5+ 3.Kd2 axb5 4.Bxb5 Ke4 5.a5 Nf3+ 6.Kc1 Nc7 7.Bf1 Nd4 8.Bg2+ Ke5 9.Bb2 1:05 8/14 -0.95 18242820 1.Ba1 Ng8 2.Bc3 Nh6 3.Bb2 Nhf7 4.Ba1 g4 5.hxg4+ Nxg4+ 6.Kd2 Nfe5 7.Bc3 Nf6 8.Ke3 Ne4 2:51 9/15 -1.05 47165997 1.Ba1 b5 2.cxb5 axb5 3.Bxb5 Nxd5+ 4.Kd2 Nc7 5.Bf1 d5 6.Kc1 Ke6 7.Bb2 Nc6 8.Kd2 Nb4 9.a5 4:00 9/15 -0.93 67409472 1.Bb2 a5 2.Bc3 Nfd7 3.Be1 g4 4.hxg4+ Nxg4+ 5.Kd3 Nde5+ 6.Kc2 Ne3+ 7.Kc3 Ke4 8.Bd2 Nf5 9.Bf1 Nd4 10.Bg2+ Nef3 11.Bg5 6:44 10/16 -0.86 115465236 1.Bb2 Nfd7 2.Bc3 g4 3.hxg4+ Nxg4+ 4.Bxg4+ Kxg4 5.Ke4 Nf8 6.Bf6 Ng6 7.Bg7 Nh4 8.Bh6 Nf5 9.Bf4 a5 10.Bh2 Ng3+ 11.Kd3 13:14 11/17 -0.87 228273078 1.Bb2 Nfd7 2.Bc3 g4 3.hxg4+ Nxg4+ 4.Bxg4+ Kxg4 5.Ke4 Nf8 6.Bf6 Ng6 7.Bg7 Nh4 8.Bf6 Nf3 9.Be7 Ng5+ 10.Ke3 Nf7 11.Ke4 Ne5 (Stopped analysis after 20 minutes) Bests Matthew
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