Author: pavel
Date: 10:31:29 12/27/01
Go up one level in this thread
On December 27, 2001 at 11:13:40, Sune Larsson wrote: > > [D]8/3k2p1/4pp2/1p2PP2/1PpP2P1/8/4K3/8 w - - 0 35 > > This position is from a game Rocha - Spraggett, 1999. > White is worse here and there are several ways for him to > lose this position. Hecht, in his commentaries, even thought > that the key move is the only way for white to make the draw. > This ending is tricky, so I'm not 100% sure that Hecht is correct. > Anyway, white has a simple and straight forward way to secure the draw. > > Theme - pawn ending: One protected passer can hold his own vs two connected. > > > Test: Programs with some of this knowledge should evaluate the position > after 1.d5! as 0.00 or close to it. > > >[Event "Boavista Masters"] >[Site "Porto"] >[Date "1999.12.31"] >[Round "5"] >[White "Rocha, Sergio"] >[Black "Spraggett, Kevin"] >[Result "1/2-1/2"] >[ECO "C02"] >[WhiteElo "2427"] >[BlackElo "2521"] >[Annotator "Hecht"] >[SetUp "1"] >[FEN "8/3k2p1/4pp2/1p2PP2/1PpP2P1/8/4K3/8 w - - 0 35"] >[PlyCount "12"] >[EventDate "1999.12.27"] > >35. d5 $1 exd5 36. e6+ Ke7 37. Ke3 c3 38. Kd3 d4 39. Kc2 g5 40. Kd3 Kd6 1/2-1/2 > >Sune this is what crafty thinks without TB (dunnno if it needs it). ------------------------------------------------------------------------------- Analysis by Crafty 18.12: 1.Ke3 -+ (-1.52) depth: 1/7 00:00:00 1.Ke3 Ke7 2.fxe6 Kxe6 µ (-1.33) depth: 2/7 00:00:00 1.Ke3 Ke7 2.Ke4 µ (-1.32) depth: 3/7 00:00:00 1.d5 exd5 2.e6+ Ke7 µ (-1.28) depth: 3/7 00:00:00 1.d5 exd5 2.e6+ Ke7 3.Ke3 µ (-1.18) depth: 4/10 00:00:00 1.Ke3 Ke7 2.Ke4 Kf7 3.fxe6+ Kxe6 µ (-1.13) depth: 4/10 00:00:00 1.Ke3 Ke7 2.d5 exd5 3.e6 µ (-1.18) depth: 5/10 00:00:00 1.Ke3 Ke7 2.Ke4 fxe5 3.dxe5 c3 4.Ke3 µ (-0.95) depth: 6/12 00:00:00 14kN 1.Ke3 Ke7 2.Ke4 fxe5 3.dxe5 Kf7 4.Kd4 Ke7 µ (-0.98) depth: 7/13 00:00:00 34kN 1.Ke3 Ke7 2.Ke4 fxe5 3.dxe5 Kf7 4.Kd4 Ke7 5.Ke4 µ (-0.98) depth: 8/15 00:00:00 83kN 1.Kf2 fxe5 2.dxe5 Ke7 3.Ke3 Kf7 4.Kf2 c3 5.Ke3 µ (-0.85) depth: 8/15 00:00:00 121kN 1.Kf2 fxe5 2.dxe5 Ke8 3.Ke3 Ke7 4.Kd4 Kf7 5.Ke4 ³ (-0.46) depth: 9/17 00:00:00 179kN 1.Ke3 ³ (-0.45) depth: 9/17 00:00:00 212kN 1.Ke3 Ke7 2.Ke4 fxe5 3.dxe5 Ke8 4.f6 Kf8 5.Kd4 Kf7 6.fxg7 Kxg7 ³ (-0.27) depth: 9/17 00:00:00 293kN 1.Ke3 Ke7 2.Ke4 fxe5 3.dxe5 Ke8 4.Kd4 Kf8 5.f6 ³ (-0.27) depth: 10/22 00:00:00 421kN 1.Ke3 Ke7 2.Ke4 fxe5 3.dxe5 Kf7 4.Kd4 Ke7 = (0.00) depth: 11/22 00:00:01 704kN 1.Ke3 Ke7 2.Ke4 fxe5 3.dxe5 Kf7 4.Kd4 Ke7 5.Ke4 = (0.00) depth: 12/24 00:00:02 1179kN 1.Ke3 Ke7 2.Ke4 g6 3.fxg6 fxe5 4.dxe5 Kf8 5.Ke3 Kg7 6.g5 Kxg6 7.Kf4 = (-0.16) depth: 13/26 00:00:03 2152kN 1.Ke3 Ke7 2.Ke4 g6 3.fxg6 fxe5 4.dxe5 Kf8 5.Ke3 Kg7 6.Kf4 Kxg6 7.Ke3 ³ (-0.26) depth: 14/29 00:00:06 3750kN 1.Ke3 Ke7 2.Ke4 g6 3.fxg6 fxe5 4.dxe5 Kf8 5.Ke3 Kg7 6.Kf4 Kxg6 7.Ke4 Kf7 8.g5 Kg6 ³ (-0.36) depth: 15/31 00:00:09 6407kN 1.Ke3 Ke7 2.Ke4 g6 3.exf6+ Kxf6 4.fxg6 Kxg6 5.Ke3 Kg5 6.Kf3 Kf6 7.Kf4 Kg7 8.Ke3 Kg6 9.Kf2 Kf6 10.Ke3 ³ (-0.70) depth: 16/34 00:00:19 13086kN 1.Ke3 Ke7 2.Ke4 g6 3.exf6+ Kxf6 4.fxg6 Kxg6 5.Ke3 Kg5 6.Kf3 Kf6 7.Kf4 Kg7 8.Ke3 Kg6 9.Kf2 Kf7 10.Ke3 Ke7 ³ (-0.70) depth: 17/39 00:00:29 20215kN 1.Ke3 Ke7 2.Ke4 g6 3.exf6+ Kxf6 4.fxe6 Kxe6 5.Ke3 Kd5 6.g5 c3 7.Kd3 c2 8.Kxc2 Kxd4 9.Kd2 Kc4 10.Ke3 Kxb4 11.Kd4 -+ (-1.58) depth: 18/44 00:00:59 40483kN 1.Ke3 Ke7 2.Ke4 g6 3.exf6+ Kxf6 4.fxe6 Kxe6 5.Ke3 Kd6 6.Ke4 Ke7 7.Kf4 Kf7 8.Ke3 Kf6 9.Kd2 Ke7 10.Ke3 Ke6 11.Ke4 g5 -+ (-1.53) depth: 19/46 00:01:54 76470kN 1.Ke3 Ke7 2.Ke4 g6 3.exf6+ Kxf6 4.g5+ Kxg5 5.fxe6 Kf6 6.d5 g5 7.Kd4 g4 8.Kc5 Ke7 9.d6+ Kxe6 10.Kc6 c3 11.d7 c2 12.d8Q c1Q+ 13.Kxb5 g3 µ (-1.40) depth: 20/47 00:03:33 142724kN 1.Ke3 Ke7 2.Ke4 g6 3.exf6+ Kxf6 4.g5+ Kxg5 5.fxe6 Kf6 6.d5 g5 7.Kd4 g4 8.Kc5 c3 9.Kd6 c2 10.e7 c1Q 11.e8Q Qf4+ 12.Kd7 Qxb4 13.Qe6+ Kg5 14.Kc6 µ (-1.19) depth: 21/50 00:07:24 292808kN 1.Ke3 Ke7 2.Ke4 g6 3.exf6+ Kxf6 4.g5+ Kxg5 5.fxe6 Kf6 6.d5 g5 7.Kd4 g4 8.Kc5 c3 9.Kd6 c2 10.e7 c1Q 11.e8Q Qf4+ 12.Kd7 Qxb4 13.Qe6+ Kg7 14.Qe5+ Kf7 15.Kc6 µ (-1.12) depth: 22/54 00:15:03 593380kN 1.Ke3 Ke7 2.Ke4 g6 3.exf6+ Kxf6 4.g5+ Kxg5 5.fxe6 Kf6 6.d5 g5 7.Kd4 g4 8.Kc5 c3 9.Kd6 c2 10.e7 c1Q 11.e8Q Qf4+ 12.Kd7 Qxb4 13.Qe6+ Kg7 14.Qe5+ Kg6 15.Qe6+ Kg5 16.Kc6 µ (-1.19) depth: 23/56 00:30:11 1181243kN (Mahamood, home 27.12.2001) ------------------------------------------------------------------------------- honestly I dont think it has any clue. pavs
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