Author: Mogens Larsen
Date: 01:50:36 11/25/00
Go up one level in this thread
On November 25, 2000 at 02:31:18, Timothy J. Frohlick wrote: >Can your program solve this queen trap problem. It may not be possible to solve >with any of todays programs. > >[D]r3k2r/pp2ppbp/1q4p1/2npP3/5P2/2P5/PP4PP/RNBQR2K w > >This is an actual position that I got myself into when playing Rebel Century 3.0 >on my PII 333 64 MB RAM at 40/120. The move sequence with me to move is: > >1. Be3 Qxb2 2. Bxc5 Qxa1 3. Qa4+ Kf8 4. Qc2!! b6 5. Bd4 Rc8 6. Rd1 e6 >7. Na3 Qxd1 8. Qxd1 and the score is +2.30 in whites' favor. > >I found that neither RC3 nor Gambit Tiger would choose the move 1. Be3. > >Will any program on faster machines find that first move for white? After that >move will any program not select the pawn and then the rook capture? Analysis by Nimzo 8: 1.a3 = (0.11) Depth: 1/11 00:00:00 1.b3 = (0.15) Depth: 1/11 00:00:00 1.b3 = (0.15) Depth: 1/11 00:00:00 1.f5 = (0.22) Depth: 1/11 00:00:00 1.f5 = (0.22) Depth: 1/11 00:00:00 1.Na3 ² (0.30) Depth: 1/11 00:00:00 1.Na3 ² (0.30) Depth: 1/11 00:00:00 1.Nd2 ² (0.43) Depth: 1/11 00:00:00 1.Nd2 ² (0.43) Depth: 1/11 00:00:00 1.Qxd5 ± (1.37) Depth: 1/11 00:00:00 1.Qxd5 ± (1.37) Depth: 1/11 00:00:00 1.Qxd5 Rd8 2.Qc4 ± (0.99) Depth: 3/14 00:00:00 1.Qxd5 ² (0.54) Depth: 5/17 00:00:00 1.Qxd5 = (-0.06) Depth: 5/17 00:00:00 1.Qxd5 Rd8 2.Qc4 Nd3 3.Be3 Qxb2 4.Qa4+ Kf8 µ (-1.04) Depth: 5/17 00:00:00 1.b4 µ (-1.03) Depth: 5/17 00:00:00 1.b4 ³ (-0.43) Depth: 5/17 00:00:00 1.b4 Ne4 2.Be3 Qc6 3.Bd4 e6 4.Kg1 ³ (-0.31) Depth: 5/17 00:00:00 1.Na3 ³ (-0.30) Depth: 5/17 00:00:00 1.Na3 Ne4 2.Qa4+ Qc6 3.Qxc6+ bxc6 4.g3 ³ (-0.28) Depth: 5/17 00:00:00 1.Re2 ³ (-0.27) Depth: 5/17 00:00:00 1.Re2 Qa6 2.Na3 Ne4 3.Bd2 = (-0.02) Depth: 5/17 00:00:00 1.Re2 Qa6 2.Na3 e6 3.Be3 Ne4 = (-0.16) Depth: 6/19 00:00:00 1.Re2 Qa6 2.Na3 Ne4 3.Nc2 e6 4.Nd4 = (-0.16) Depth: 7/20 00:00:01 1.Qc2 = (-0.15) Depth: 7/20 00:00:01 297kN 1.Re2 Qa6 2.Na3 Ne4 3.Nc2 e6 4.Nd4 = (-0.16) Depth: 7/20 00:00:01 297kN 1.Qe2 = (-0.15) Depth: 7/20 00:00:01 297kN 1.Qe2 Qa6 2.Qxa6 Nxa6 3.Be3 e6 4.g3 h5 = (-0.10) Depth: 7/20 00:00:02 297kN 1.Qe2 e6 2.Be3 Qc6 3.Nd2 Kf8 4.Bxc5+ Qxc5 5.Qd1 = (-0.01) Depth: 8/22 00:00:02 808kN 1.Qe2 e6 2.Be3 Qc6 3.Na3 Kf8 4.Qf3 = (-0.07) Depth: 9/23 00:00:04 1930kN 1.Qc2 = (-0.06) Depth: 9/23 00:00:05 2520kN 1.Qc2 Qa6 2.Be3 Rc8 3.Rd1 e6 4.b3 Kf8 5.c4 = (-0.06) Depth: 9/23 00:00:07 3457kN 1.Qc2 Qa6 2.Be3 Rc8 3.Rd1 e6 4.Bxc5 Rxc5 5.Qf2 Rc4 6.Nd2 = (-0.13) Depth: 10/25 00:00:14 6921kN 1.Qe2 = (-0.12) Depth: 10/25 00:00:16 8087kN 1.Qe2 Rc8 2.Be3 a5 3.Na3 e6 4.Nb5 Kf8 5.Nd6 Nd3 = (0.07) Depth: 10/25 00:00:28 13794kN 1.Be3 = (0.08) Depth: 10/25 00:00:34 17628kN 1.Be3 Qc6 2.Na3 Ne4 3.Rc1 b5 4.Nc2 e6 5.Nd4 Qc4 ² (0.49) Depth: 10/25 00:01:01 31746kN 1.Be3 Qc6 2.Na3 Ne4 3.Bd4 e6 4.c4 Bxe5 5.Rxe4 Bxd4 ² (0.43) Depth: 11/26 00:01:21 42686kN 1.Be3 Qc6 2.Na3 Ne4 3.Rc1 Bh6 4.Qb3 e6 5.c4 Kf8 6.Red1 ² (0.47) Depth: 12/28 00:02:26 79799kN 1.Be3 Qc6 2.Na3 Ne4 3.Qb3 e6 4.c4 a5 5.Rad1 a4 6.cxd5 ² (0.45) Depth: 13/29 00:05:46 195742kN Best wishes... Mogens
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