Author: Eelco de Groot
Date: 09:05:54 03/19/05
Go up one level in this thread
On March 17, 2005 at 23:01:22, Robin Smith wrote: >Several years ago I posted the position below, which at that time no program >could solve. I have discovered that Shredder 9 can now find the correct move in >about 4 hours on my old Athlon MP2000+. How do other programs do? > >[D] r1qr2k1/pb2bpp1/1p2pn1p/2p4P/3P1B2/2PB1N2/PP2QPP1/1K1R3R w - - 0 15 > >15.Rhg1! > >-Robin This does seem a difficult tactical problem. I tried it yesterday with a tactical style Q5T in Pro Deo, but it does not play Rhg1 on its own. Maybe after 4 hours or a faster machine it can find that move, I stopped after about 30 minutes at ply twelve. After entering 1.Rhg1 Nxh5 the score goes up to +0.95 at ply ten, 30 minutes on Celeron 500 MHz. I suppose 1.Rhg1 Nxh5 2.Bxh6 is the key-line to be found? At least that is what Q5T comes up with after 1.Rhg1. "Quiet" move 1.Ne5 that Q5T chooses also does not seem without chances though? I haven't tried 1.Rhg1 b5 that Fritz gives. Pro Deo 1.1 00:00:00.6 0,21 1 28 dxc5 Qxc5 00:00:00.6 0,26 1 69 Be5 00:00:00.7 0,26 1 105 Bg3 00:00:00.7 0,27 1 107 Qe3 00:00:00.7 0,27 1 120 Bc2 00:00:00.7 0,35 1 139 Rde1 00:00:00.7 0,37 1 159 Qe5 00:00:00.7 -0,19 2 312 Qe5 cxd4 Nxd4 Bxg2 00:00:00.7 0,15 2 459 Bc2 cxd4 Rxd4 00:00:00.8 -0,17 3 2043 Bc2 cxd4 Rxd4 Rxd4 cxd4 00:00:00.8 0,05 3 2791 Be5 cxd4 Bxd4 Bd5 00:00:00.8 0,16 3 3721 Rc1 cxd4 cxd4 Qd7 00:00:00.8 0,00 4 9300 Rc1 cxd4 cxd4 Qd7 Be5 00:00:00.8 0,14 4 10479 Be5 cxd4 Bxd4 Bd5 b3 00:00:01.3 0,09 5 34201 Be5 cxd4 Bxd4 Bd5 Qe3 Kf8 00:00:02.6 0,09 6 96992 Be5 cxd4 Bxd4 Qc6 Qe3 Qa4 b3 00:00:05.4 0,12 7 370291 Be5 a6 dxc5 Qxc5 Bd4 Qc7 Qe3 b5 00:00:06.8 0,14 7 550926 dxc5 Bxc5 Be5 Be7 Qe3 Ng4 Qe2 Nf6 Qe3 Ng4 Qe2 00:00:12.0 0,15 8 1168861 dxc5 Qxc5 Ne5 Rac8 f3 Nd5 Qd2 Kf8 00:00:29.3 0,17 9 3436883 dxc5 Bxc5 Be5 Ng4 Bd4 00:01:05.4 0,20 10 8307586 dxc5 Qxc5 Ne5 Rac8 Rhe1 Bd5 g3 Qa5 c4 00:02:14.5 0,19 11 17738941 dxc5 Qxc5 Ne5 Kf8 Rhg1 Qa5 Rge1 Nd5 Qg4 00:05:36.0 0,18 12 45696014 dxc5 Qxc5 Ne5 b5 Rhe1 b4 cxb4 Qxb4 Bd2 Qb6 Be3 Q5T in Pro Deo 1.1: 00:00:00.7 -0,22 1 32 dxc5 Bxf3 gxf3 Qxc5 00:00:00.7 -0,19 1 48 Ne5 cxd4 00:00:00.7 0,32 1 79 Be5 00:00:00.7 0,34 1 115 Bg3 00:00:00.8 0,35 1 130 Bc2 00:00:00.8 0,45 1 142 Rde1 00:00:00.8 0,68 1 162 Qe5 00:00:00.8 -0,02 2 327 Qe5 cxd4 Nxd4 Bxg2 00:00:00.8 0,23 2 1629 Ne5 cxd4 00:00:00.9 -0,29 3 5507 Ne5 cxd4 f3 dxc3 00:00:01.0 -0,29 4 28649 Ne5 cxd4 f3 dxc3 00:00:01.4 -0,29 4 62615 Rdg1 00:00:01.5 -0,01 4 64028 Rdg1 cxd4 Nxd4 Rxd4 cxd4 Bd5 00:00:01.6 0,01 4 77638 dxc5 Qxc5 Ne5 Bxg2 Rhe1 00:00:02.2 -0,08 5 150563 dxc5 Bxc5 Ka1 Bd5 Ne5 Bxg2 00:00:02.9 -0,01 5 232335 Rc1 a6 dxc5 Qxc5 00:00:03.8 0,00 6 320055 Rc1 Bd5 dxc5 Qxc5 c4 00:00:04.1 0,00 6 359679 dxc5 00:00:04.6 0,04 6 424191 dxc5 Bxc5 Bc2 Rxd1+ Rxd1 Nxh5 Qe5 Bxf3 gxf3 00:00:10.5 0,46 7 1269516 dxc5 Qxc5 Ne5 Rac8 Nxf7 Kxf7 Bg6+ Kf8 Rxd8+ Rxd8 00:00:25.8 0,49 8 3591737 dxc5 Bxc5 Ne5 Kf8 Rhe1 Bxg2 Rg1 Qb7 Nxf7 Qxf7 00:00:28.9 0,49 8 4055058 Ne5 00:00:29.6 0,63 8 4149526 Ne5 cxd4 cxd4 Rf8 00:00:43.6 0,59 9 6394978 Ne5 cxd4 cxd4 Nd5 Bg3 Nc3+ 00:02:09.1 0,85 10 20274224 Ne5 cxd4 cxd4 Nd5 Bd2 Kf8 Rc1 00:06:40.6 0,93 11 63836179 Ne5 cxd4 cxd4 Rd5 Rc1 Qf8 Qe3 Ra5 00:28:24.9 1,00 12 283085652 Ne5 cxd4 cxd4 Bd6 Rc1 Qb8 Rh3 Rc8 Rg3 After 1.Rhg1 Nxh5 00:00:00.7 -3,22 1 40 dxc5 Nxf4 00:00:00.7 -2,41 1 59 Bxh6 gxh6 00:00:00.7 -0,01 1 91 Be5 00:00:00.7 0,46 1 133 Qe5 00:00:00.7 0,09 2 304 Qe5 Nf6 00:00:00.8 -0,04 3 7559 Qe5 Nf6 Kc1 00:00:01.0 -0,46 4 30852 Qe5 Bxf3 gxf3 Rd5 Qe4 cxd4 00:00:01.9 -0,53 5 109583 Qe5 Rd5 Qc7 Qxc7 Bxc7 cxd4 Nxd4 00:00:02.0 -0,53 5 115572 Be5 00:00:02.0 -0,53 5 109583 Qe5 Rd5 Qc7 Qxc7 Bxc7 cxd4 Nxd4 00:00:02.8 -0,48 5 208208 Qe3 cxd4 Nxd4 Bd5 Be5 Bg5 00:00:03.7 -0,43 6 293604 Qe3 Bxf3 Qxf3 Nxf4 Qxf4 Bg5 Qf3 cxd4 00:00:03.8 -0,43 6 318782 Be5 00:00:03.9 -0,26 6 323642 Be5 Nf6 Qe3 cxd4 Nxd4 Kf8 Qg3 00:00:06.1 -0,51 7 621360 Be5 Nf6 Qe3 cxd4 Nxd4 Kf8 Bxf6 Bxf6 Bh7 00:00:30.7 -0,51 7 4572641 Bxh6 00:00:54.0 0,12 7 8159310 Bxh6 gxh6 Qe3 c4 Qxh6 cxd3 Qxh5 Bf6 Ng5 Qd7 00:01:53.1 0,12 8 17629064 Bxh6 gxh6 Qe3 c4 Qxh6 cxd3 Qxh5 Bf6 Ng5 Qd7 00:05:11.2 0,46 9 49567188 Bxh6 gxh6 Qe3 c4 Qxh6 cxd3 Qxh5 Bf6 Ng5 Rd7 Qh6 Bg7 00:30:05.7 0,95 10 274919662 Bxh6 gxh6 Qe3 c4 Bc2 Eelco
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