Author: Albert Silver
Date: 18:34:28 10/30/04
Go up one level in this thread
On October 30, 2004 at 20:47:24, Eelco de Groot wrote:
>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.
It is caused by the parameter:
[Pruning = MISC_65] * research fail-high-error one ply deeper (!)
If you turn it off, it won't repeat the line. This way it is actually taking
those two lines to 11 plies to see whether the extra ply doesn't help resolve
its indecision.
Albert
>
>[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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