Author: chandler yergin
Date: 07:42:45 12/07/05
Every Engine will evaluate a position differently. Proof? Sure? Just turn on several Engines at the same time from the Start Position, and see how they evaluate that! Another Point is that many so-called Test Positions are just plain wrong. I have found many where the - - bm at the end of the FEN obviously means 'bad move'. So who cares how long it takes your Engine to find a 'bad move'? Hmmmm? Here's a perfect example, one I selected at random out of thousands of FENS. [D]3r2k1/1q1P1ppp/r2R2n1/p4Q2/1ppB2R1/6P1/PP3PP1/6K1 w - - bm Rgxg6; id ECM.029; New game [D]3r2k1/1q1P1ppp/r2R2n1/p4Q2/1ppB2R1/6P1/PP3PP1/6K1 w - - 0 1 Analysis by Shredder 8: 1.Rxa6 Qxa6 +- (2.19) Depth: 1/2 00:00:12 1.Rd5 +- (2.21) Depth: 1/8 00:00:12 1.Rd5 +- (2.21) Depth: 1/8 00:00:12 1.Rd5 Re6 2.Rxa5 Qxd7 +- (1.92) Depth: 2/7 00:00:12 1.Rd5 Re6 2.Rxa5 Qxd7 +- (1.92) Depth: 2/7 00:00:12 1.Rxa6 Qxg2+ 2.Kxg2 +- (1.93) Depth: 2/7 00:00:12 1.Rxa6 Qxa6 2.Re4 +- (2.17) Depth: 2/7 00:00:12 1.Rxa6 Qxa6 2.Re4 Qd6 +- (1.94) Depth: 3/10 00:00:13 1.Rxa6 Qxa6 2.Re4 Qc6 3.Qxa5 Rxd7 4.Qxb4 +- (2.08) Depth: 4/13 00:00:14 1.Rxa6 Qxa6 2.Re4 Qc6 3.Qxa5 Qxd7 4.Qxb4 +- (2.03) Depth: 5/13 00:00:17 1.Rxa6 Qxa6 2.Re4 Qc6 3.Qxa5 Qxd7 4.Qxb4 Qf5 +- (1.94) Depth: 6/20 00:00:27 1.Rgxg6 hxg6 2.Qe5 Qc8 +- (1.95) Depth: 6/20 00:00:29 1.Rgxg6 hxg6 2.Qe5 Rxd7 3.Rxd7 Qb6 +- (2.30) Depth: 6/20 00:00:30 1.Rgxg6 hxg6 2.Qe5 f6 3.Qe6+ Kh7 4.Rxa6 Qxd7 5.Qxd7 Rxd7 6.Rxa5 Rxd4 +- (3.88) Depth: 6/20 00:00:32 1.Rgxg6 hxg6 2.Qe5 f6 3.Qe6+ Kh7 4.Rxa6 Qxd7 5.Qxd7 Rxd7 6.Be3 +- (3.74) Depth: 7/26 00:00:43 41kN 1.Rgxg6 hxg6 2.Qe5 f6 3.Qe6+ Kh7 4.Rxa6 Qxd7 5.Qxc4 Qxd4 6.Qg8+ Kxg8 +- (3.49) Depth: 8/31 00:00:57 75kN 1.Rgxg6 hxg6 2.Qe5 f6 3.Qe6+ Kh7 4.Rxa6 Qxd7 5.Qxd7 Rxd7 6.Be3 Rd1+ 7.Kh2 +- (3.41) Depth: 8/31 00:01:03 91kN 1.Rxa6 Qxa6 2.Rxg6 hxg6 3.Qe5 Qf6 4.Qe8+ Kh7 5.Bxf6 Rxe8 6.dxe8Q gxf6 +- (3.42) Depth: 8/31 00:01:07 104kN 1.Rxa6 Qxa6 2.Rxg6 hxg6 3.Qe5 f6 4.Qe8+ Rxe8 5.dxe8Q+ Kh7 6.Qf7 a4 7.Bc5 c3 8.Bf8 +- (3.52) Depth: 8/31 00:01:12 128kN 1.Rxa6 Qxa6 2.Rxg6 hxg6 3.Qe5 f6 4.Qe8+ Rxe8 5.dxe8Q+ Kh7 6.Qd7 b3 7.a3 Kg8 8.Qe7 Qa8 +- (3.75) Depth: 9/24 00:01:24 196kN 1.Rxa6 Qxa6 2.Rxg6 hxg6 3.Qe5 f6 4.Qe8+ Rxe8 5.dxe8Q+ Kh7 6.Qd7 g5 7.Bc5 Kg8 8.Qe8+ Kh7 9.Qf7 Kh6 10.Bf8 c3 +- (3.82) Depth: 10/28 00:01:28 304kN 1.Rxa6 Qxa6 2.Rxg6 hxg6 3.Qe5 f6 4.Qe8+ Rxe8 5.dxe8Q+ Kh7 6.Qd7 g5 7.Bc5 Kg8 8.Qe8+ Kh7 9.Qf7 Kh6 10.Bf8 c3 +- (3.82) Depth: 11/24 00:01:29 438kN 1.Rxa6 Qxa6 2.Rxg6 hxg6 3.Qe5 f6 4.Qe8+ Rxe8 5.dxe8Q+ Kh7 6.Qd7 Kg8 7.f3 a4 8.Kf2 a3 9.bxa3 bxa3 10.g4 Kh7 11.Qf7 +- (3.80) Depth: 12/35 00:01:30 908kN 1.Rxa6 Qxa6 2.Rxg6 hxg6 3.Qe5 f6 4.Qe8+ Rxe8 5.dxe8Q+ Kh7 6.Qd7 Kg8 7.f3 a4 8.Qe7 Qb5 9.Kf2 Kh7 10.Qc7 Kg8 11.g4 Qd5 +- (3.77) Depth: 13/34 00:01:32 1765kN 1.Rxa6 Qxa6 2.Rxg6 hxg6 3.Qe5 f6 4.Qe8+ Rxe8 5.dxe8Q+ Kh7 6.Qd7 Kg8 7.f3 a4 8.Qe7 Qb5 9.Kf2 Kh7 10.Qc5 Qxc5 11.Kf1 +- (3.72) Depth: 14/36 00:01:37 3600kN 1.Rf4 Nxf4 2.gxf4 h6 3.Qg4 g5 4.fxg5 Kf8 5.gxh6 Rxd7 6.Qxd7 Kg8 7.Qxb7 +- (3.73) Depth: 14/36 00:01:44 5732kN 1.Rf4 Nxf4 2.gxf4 h6 3.Qg4 g5 4.fxg5 Kf8 5.gxh6 Rxd7 6.Qxd7 Kg8 7.Qxb7 Kh7 +- (4.08) Depth: 14/36 00:01:45 6125kN 1.Rf4 Nxf4 2.gxf4 h5 3.Qe5 f6 4.Qe8+ Kh7 5.Qxh5+ Kg8 6.Rxa6 Qxa6 7.Qe8+ Rxe8 8.dxe8Q+ Kh7 9.Qe2 Qd6 10.Qc2+ Kh6 11.Qxc4 Qxf4 12.b3 Kg6 13.Qd5 +- (4.87) Depth: 14/44 00:02:04 13207kN 1.Rf4 Nxf4 2.gxf4 h5 3.Qe5 f6 4.Qe8+ Kh7 5.Qxh5+ Kg8 6.Rxa6 Qxa6 7.Qe8+ Rxe8 8.dxe8Q+ Kh7 9.Qe2 Qd6 10.Qc2+ Kh8 11.Qxc4 Qxf4 12.Qc5 Qe4 13.Qf8+ Kh7 14.Bb6 +- (5.04) Depth: 15/38 00:02:14 16400kN 1.Rf4 Nxf4 2.gxf4 h5 3.Qe5 f6 4.Qe8+ Kh7 5.Qxh5+ Kg8 6.Rxa6 Qxa6 7.Qe8+ Rxe8 8.dxe8Q+ Kh7 9.Qe2 Qd6 10.Qc2+ Kh8 11.Qxc4 Qxf4 12.a3 Qd2 13.Qc8+ Kh7 14.Qf5+ Kg8 15.Qe6+ +- (4.96) Depth: 16/45 00:02:33 22967kN 1.Rf4 Nxf4 2.gxf4 h5 3.Qe5 f6 4.Qe8+ Kh7 5.Qxh5+ Kg8 6.Rxa6 Qxa6 7.Qe8+ Rxe8 8.dxe8Q+ Kh7 9.Qd7 Kg8 10.f5 Kh7 11.Qc7 Kg8 12.Qd8+ Kh7 13.Qe7 Qc6 14.Qf7 c3 15.Qxg7+ +- (5.06) Depth: 17/44 00:03:13 36903kN 1.Rf4 Nxf4 2.gxf4 h5 3.Qe5 f6 4.Qe8+ Kh7 5.Qxh5+ Kg8 6.Rxa6 Qxa6 7.Qe8+ Rxe8 8.dxe8Q+ Kh7 9.Qd7 Kg8 10.f5 Kh7 11.Qc7 Kg8 12.Qd8+ Kh7 +- (5.06) Depth: 18/49 00:04:37 64942kN 1.Rf4 Nxf4 2.gxf4 h5 3.Qe5 f6 4.Qe8+ Kh7 5.Qxh5+ Kg8 6.Rxa6 Qxa6 7.Qe8+ Rxe8 8.dxe8Q+ Kh7 9.Qd7 Kg8 10.f5 Kh7 11.Qc7 Kg8 12.Qd8+ Kh7 +- (5.06) Depth: 19/50 00:06:59 113913kN (, MyTown 06.12.2005)
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