Author: Chessfun
Date: 14:27:21 08/11/00
Go up one level in this thread
On August 07, 2000 at 14:35:46, blass uri wrote: >On August 07, 2000 at 14:17:32, Jari Huikari wrote: > >>On August 06, 2000 at 07:12:21, blass uri wrote: >> >>>On August 06, 2000 at 06:54:57, Carlo Meier wrote: >>> >>>>Ra2+ ist not the right move... :) >>>> >>>>greeting: Carlo >>> >>>Do you mean that Ra2 does not win or that it does not win in the shortest way? >>> >>>I think that rook and a bishop win against bishop and a pawn. >>>White cannot take the pawn but may drive black king into the corner >>> >>>Uri >> >>How about moving Rh1 and then Nf4 ? >> >> Jari > >I also thought about this line but did not see a clear win when I analyzed with >a computer after some minutes. > >The problem is that the black bishop can be in the diagnol h5-d1 and I do not >see a way for white to get to the right square with the knigh. > >I admit that >1.Ra2+ Kh3 2.Ng5+ Kg3 3.Be5+ f4 is good for black and it is surprising that some >programs(including crafty with no tablebases) believe that a piece advantage >after sacrificing the rook for 2 pawns is more than 4 pawns advantage > >I believe that only material counting programs with no tablebases can see a main >line with an endgame with a piece advantage but some programs have evaluation >function that is worse than only material evaluation in this case and they >prefer to go for position with rook for a pawn adavntage for white and not a >knight advantage. > >Junior5.9 has better evaluation and it evaluate the position as close to +1 for >white and does not see win for white. > >Uri After 1. Rh1 Kxh1 2. Nf4. Then. Goliath Light - Bird,S 8/8/2b5/5p2/3B1N2/2K5/7p/7k b - - 0 1 Analysis by Goliath Light: 2...Be8 3.Kc4 Bf7+ 4.Kc5 µ (-1.21) Depth: 6/6 00:00:00 2...Be8 3.Kc4 Bd7 4.Kd5 µ (-1.07) Depth: 6/7 00:00:00 2kN 2...Bb5 3.Kb4 Ba6 4.Kc5 µ (-1.17) Depth: 6/8 00:00:00 3kN 2...Bb7 3.Kc4 Be4 4.Kc5 µ (-1.23) Depth: 6/8 00:00:00 5kN 2...Bb7 3.Kc4 Be4 4.Kc5 µ (-1.23) Depth: 7/8 00:00:00 5kN 2...Bb7 3.Kc4 Bg2 4.Kc5 Bf1 5.Kd5 µ (-1.04) Depth: 7/11 00:00:00 7kN 2...Be8 µ (-1.15) Depth: 7/11 00:00:00 10kN 2...Be8 3.Kc4 Bf7+ 4.Kb4 Ba2 5.Kc5 Bg8 µ (-1.17) Depth: 7/11 00:00:00 11kN 2...Be8 3.Kc4 Bf7+ 4.Kb4 Ba2 5.Kc5 Bg8 µ (-1.17) Depth: 8/11 00:00:00 13kN 2...Be8 3.Kc4 Bf7+ 4.Kb4 Ba2 5.Kc5 Bg8 ± (0.72) Depth: 8/11 00:00:00 16kN 2...Be8 3.Kd2 Bf7 4.Ke1 Ba2 5.Kf2 Bb3 6.Bc3 Bd1 7.Be5 Bg4 8.Ne6 Bd1 ² (0.65) Depth: 8/11 00:00:00 17kN 2...Bd5 ² (0.50) Depth: 8/11 00:00:00 24kN 2...Bd5 3.Bf2 Be4 4.Bg3 Bf3 5.Bxh2 Kxh2 µ (-1.08) Depth: 8/14 00:00:00 47kN 2...Bd5 3.Bf2 Be4 4.Bg3 Bf3 5.Bxh2 Kxh2 µ (-1.08) Depth: 9/14 00:00:00 48kN 2...Bd5 3.Bf2 Bf3 4.Bg3 Bc6 5.Bxh2 Kxh2 µ (-1.08) Depth: 9/18 00:00:00 112kN 2...Bd5 3.Bf2 Bf3 4.Bg3 Bc6 5.Bxh2 Kxh2 µ (-1.08) Depth: 10/18 00:00:00 114kN 2...Bd5 3.Bf2 Bf3 4.Bg3 Bc6 5.Bxh2 Kxh2 = (0.00) Depth: 10/18 00:00:01 165kN 2...Bd5 3.Kd2 Bg8 4.Ke2 Bh7 5.Be5 Bg8 6.Bd4 Bh7 = (0.00) Depth: 10/18 00:00:01 201kN 2...Bd5 3.Kd2 Bg8 4.Ke2 Bh7 5.Be5 Bg8 6.Bd4 Bh7 = (0.00) Depth: 11/18 00:00:01 214kN 2...Bd5 3.Kd2 Bg8 4.Ke2 Bh7 5.Be5 Bg8 6.Bd4 Bh7 ± (0.89) Depth: 11/18 00:00:01 214kN 2...Bd5 3.Kd2 ± (0.88) Depth: 11/18 00:00:01 272kN 2...Be8 ± (0.77) Depth: 11/18 00:00:01 355kN 2...Bd5 3.Kd2 ± (0.88) Depth: 11/18 00:00:01 357kN 2...Bd5 3.Kd2 ± (0.88) Depth: 12/18 00:00:01 370kN 2...Bd5 3.Kd2 +- (1.72) Depth: 12/18 00:00:01 371kN 2...Bd5 3.Kd2 Bg8 4.Ke2 +- (1.71) Depth: 12/18 00:00:02 585kN 2...Bd5 3.Kd2 Bg8 4.Ke2 +- (1.71) Depth: 13/18 00:00:02 615kN 2...Bd5 3.Kd2 Bg8 4.Ke2 +- (#18) Depth: 13/18 00:00:02 625kN 2...Bd5 3.Kd2 Bg8 4.Ke2 Bh7 5.Kf2 Bg8 6.Bc3 Bb3 7.Ba1 Ba4 8.Be5 Bd1 9.Bc7 +- (#14) Depth: 13/18 00:00:03 1304kN 2...Be8 3.Kd2 Bd7 4.Be3 Bc8 5.Ke2 Ba6+ 6.Ke1 Bd3 7.Kd2 Be2 +- (#18) Depth: 13/18 00:00:05 2428kN 2...Be8 3.Kd2 Bd7 4.Be3 Bc8 5.Ke2 Ba6+ 6.Ke1 Bd3 7.Kd2 Be2 +- (#18) Depth: 14/18 00:00:07 3419kN 2...Be8 3.Kd2 Bd7 4.Ke1 Ba4 5.Ke2 Bc2 6.Kf2 Bb3 7.Be3 Bd1 8.Ne6 f4 9.Bxf4 Bc2 10.Nd4 Bh7 11.Bc7 +- (#13) Depth: 14/20 00:00:11 6464kN 2...Be4 3.Kd2 Bc2 4.Ke2 Ba4 5.Be3 Bd1+ 6.Kf2 Bg4 7.Bd4 +- (#14) Depth: 14/22 00:00:17 11286kN 2...Be4 3.Kd2 Bc2 4.Ke2 Ba4 5.Be3 Bd1+ 6.Kf2 Bg4 7.Bd4 +- (#14) Depth: 15/22 00:00:17 11329kN 2...Be4 3.Kd2 Bc2 4.Ke2 Ba4 5.Be3 Bd1+ 6.Kf2 +- (#14) Depth: 15/23 00:00:36 20763kN 2...Be4 3.Kd2 Bc2 4.Ke2 Ba4 5.Be3 Bd1+ 6.Kf2 +- (#14) Depth: 16/25 00:01:09 41172kN 2...Be4 3.Kd2 Bc2 4.Ke2 +- (#14) Depth: 16/25 00:01:45 69689kN 2...Bb7 3.Kd3 Ba6+ 4.Kd2 Bb7 5.Ke1 Bg2 6.Be5 Bh3 7.Kf2 Bg4 8.Bc3 +- (#16) Depth: 16/25 00:02:22 98187kN 2...Bb7 3.Kd3 Ba6+ 4.Kd2 Bb7 5.Ke1 Bg2 6.Be5 Bh3 7.Kf2 Bg4 8.Bc3 +- (#16) Depth: 17/25 00:02:22 98204kN 2...Bb7 3.Kd3 Ba6+ 4.Kd2 Bb7 5.Bc5 Bc6 6.Be3 Bb5 7.Ke1 Bc4 8.Kf2 Bb5 9.Nh5 f4 +- (#17) Depth: 17/28 00:04:49 188711kN 2...Bb7 3.Kd3 Ba6+ 4.Kd2 Bb7 5.Bc5 Bc6 6.Be3 Bb5 7.Ke1 Bc4 8.Kf2 Bb5 9.Nh5 f4 +- (#17) Depth: 18/28 00:04:51 190023kN (Bird, Scarb 11.08.2000) Thanks.
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