Author: Eelco de Groot
Date: 17:47:24 10/30/04
Go up one level in this thread
Though there is probably no connection with the ply displayproblem from Thomas, I just got a case not of missing lines, but one of duplicate lines with a version of "Search & Destroy" settings, that I call S&D 6_7e. I suspect the parameter [Pruning = MISC_01]* TREE: if (reduce & rd=0) goto tr76 to be the culprit. The extra lines at ply ten can be partly explained as false fail highs, but why are there two of them it seems? The position was the one Bas Hamstra gave below from the Tao-Tiger game. [D] r2qr1k1/pb4b1/1pnP2pp/5p2/5PB1/B4NQ1/P5PP/2R1R1K1 w - - Pro Deo 1.0 S&D 6_7e 00:00:00.8 0,03 1 79 Rxe8+ Qxe8 00:00:00.8 0,34 1 606 Bh3 00:00:00.8 0,34 2 969 Bh3 Rxe1+ Rxe1 00:00:00.9 0,64 3 3991 Bh3 Rxe1+ Rxe1 Qf6 Ne5 00:00:00.9 0,64 4 13153 Bh3 Rxe1+ Rxe1 Qf6 Ne5 00:00:01.0 0,64 5 23619 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Re8 d7 Re6 00:00:01.1 0,64 6 43271 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Re8 d7 Re6 00:00:01.9 0,67 7 138688 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Kh7 Nxc6 Bxc6 Re7 00:00:04.0 0,50 8 488829 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Kh7 Re3 a5 d7 Nd4 00:00:11.0 0,35 9 1660181 Bh3 Qf6 d7 Rxe1+ Rxe1 Qf7 Ne5 Nxe5 fxe5 Bd5 Rd1 00:00:36.2 0,06 10 5996844 Bh3 Qf6 Rcd1 Rxe1+ Rxe1 Qf7 Ne5 Nxe5 fxe5 Be4 Bb4 Rc8 00:00:44.8 0,06 10 7810505 Bxf5 00:00:45.0 0,06 10 5996844 Bh3 Qf6 Rcd1 Rxe1+ Rxe1 Qf7 Ne5 Nxe5 fxe5 Be4 Bb4 Rc8 00:01:02.8 0,06 10 11540665 Bh3 Qf6 Rcd1 Rxe1+ Rxe1 Qf7 Ne5 Nxe5 fxe5 Be4 Bb4 Rc8 00:01:05.0 0,06 10 11949349 Bxf5 00:01:39.0 1,70 10 18320550 Bxf5 gxf5 Bb2 Rxe1+ Rxe1 Qf8 Nh4 Kh7 Qg6+ Kh8 d7 Bxb2 Re8 Bd4+ Kh1 Nb4 00:01:58.9 1,70 11 22298118 Bxf5 gxf5 Bb2 Rxe1+ Rxe1 Qf8 Nh4 Kh7 Qg6+ Kh8 d7 Bxb2 Re8 Bd4+ Kh1 Nb4 00:14:21.0 2,77 12 157538543 Bxf5 gxf5 Bb2 Rxe1+ Rxe1 Qf8 Nh4 Qf7 Nxf5 Kh7 Qxg7+ 00:14:59.8 2,77 13 166212741 Bxf5 gxf5 Bb2 Rxe1+ Rxe1 Qf8 Nh4 Qf7 Nxf5 Kh7 Qxg7+ I never saw a case of missing lines but that is possibly because I very rarely get as deep as 17 ply. The score here for S&D 6_7e at twelve and thirteen ply looks good but the line itself is a little less convincing. I have made a version S&D 6_7e3 that finds Bxf5 an ieny mieny bit faster, because no false fail highs, score at ply twelve does not go up though. S&D 6_7e3, Celeron 500 MHz 28 Mb HT 00:00:00.7 0,03 1 79 Rxe8+ Qxe8 00:00:00.7 0,35 1 602 Bh3 00:00:00.7 0,34 2 965 Bh3 Rxe1+ Rxe1 00:00:00.7 0,66 3 4004 Bh3 Rxe1+ Rxe1 Qf6 Ne5 00:00:00.8 0,66 4 7649 Bh3 Rxe1+ Rxe1 Qf6 Ne5 00:00:00.8 0,64 5 18485 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Re8 d7 Re6 00:00:01.0 0,64 6 38073 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Re8 d7 Re6 00:00:01.7 0,67 7 135340 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Kh7 Nxc6 Bxc6 Re7 00:00:03.8 0,55 8 469626 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Kh7 Re3 b5 d7 Nd4 Bc5 00:00:10.8 0,31 9 1643836 Bh3 Qf6 d7 Rxe1+ Rxe1 Qf7 Ne5 Nxe5 fxe5 Be4 Re2 a6 00:00:40.0 0,05 10 6582856 Bh3 Qf6 Rcd1 Rxe1+ Rxe1 Qf7 Ne5 Nxe5 fxe5 00:00:53.6 0,05 10 9426418 Bxf5 00:00:56.8 0,65 10 10146503 Bxf5 gxf5 Bb2 Qd7 Nh4 Kh8 Ng6+ Kh7 Ne7 Nd4 Rc7 00:01:21.3 1,11 11 15295727 Bxf5 gxf5 Bb2 Qd7 Nh4 Kh8 Ng6+ Kh7 Ne7 Nd4 Rc7 Qb5 Bxd4 Bxd4+ Kh1 Bxg2+ Qxg2 Qd3 00:03:41.6 1,01 12 43457723 Bxf5 gxf5 Bb2 Qd7 Nh4 Kh8 Ng6+ Kh7 Ne7 Rxe7 00:22:05.2 2,10 13 245053129 Bxf5 gxf5 Bb2 Qd7 Nh4 Kh8 Ng6+ Kh7 Ne7 Bd4+ Bxd4 01:23:21.8 2,34 14 912027931 Bxf5 gxf5 Bb2 Qd7 Nh4 Kh8 Ng6+ Kh7 Ne7 Rxe7 S&D 6_7 00:00:00.7 0,02 1 79 Rxe8+ Qxe8 00:00:00.8 0,34 1 602 Bh3 00:00:00.8 0,33 2 965 Bh3 Rxe1+ Rxe1 00:00:00.8 0,63 3 4258 Bh3 Rxe1+ Rxe1 Qf6 Ne5 00:00:00.9 0,63 4 12302 Bh3 Rxe1+ Rxe1 Qf6 Ne5 00:00:01.0 0,64 5 23915 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Re8 d7 Re6 00:00:01.1 0,64 6 46871 Bh3 Rxe1+ 00:00:01.8 0,67 7 132715 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Kh7 Nxc6 Bxc6 Re7 00:00:03.4 0,51 8 357023 Bh3 Rxe1+ Rxe1 Qf6 Ne5 Kh7 Re3 a6 d7 Nd4 Bb4 00:00:08.9 0,22 9 1181286 Bh3 Qf6 d7 Rxe1+ Rxe1 Qf7 Ne5 Nxe5 fxe5 Bd5 Bd6 Bxa2 00:00:30.6 0,07 10 4597570 Bh3 Qf6 Rcd1 Rxe1+ Rxe1 Qf7 Ne5 Nxe5 fxe5 Be4 Bb4 Qc4 00:01:14.6 0,00 11 11657325 Bh3 Qf6 Qf2 Rxe1+ Rxe1 Kh7 d7 Qc3 Bd6 Re8 00:01:37.9 0,00 11 16010894 Bxf5 00:01:49.6 0,77 11 18154014 Bxf5 gxf5 Bb2 Qd7 Ne5 Nxe5 Bxe5 Bc6 Bxg7 Rxe1+ 00:02:56.2 1,07 12 30752865 Bxf5 gxf5 Bb2 Qd7 Nh4 Kh8 Ng6+ Kh7 Ne7 00:15:51.1 2,06 13 168538079 Bxf5 gxf5 Bb2 Qd7 Nh4 Kh8 Ng6+ Kh7 Ne7
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