Author: jonathan Baxter
Date: 14:44:13 02/23/99
Go up one level in this thread
On February 22, 1999 at 13:44:42, Bruce Moreland wrote: > >On February 22, 1999 at 08:14:05, Dan Homan wrote: > >>On February 22, 1999 at 04:09:49, Will Singleton wrote: >> >>>New Feature >>> >>>I thought I'd post a position each week, taken from member submissions >>>from the current week's play. Recently on the CCC board we've had a few >>>positions posted, and these have helped me track down some problems with >>>my code. Probably just chance, but I think these things are helpful >>>for programmers in that they can see how their results differ from others, >>>and figure out why. >>> >>>So members, please send me interesting games that your programs play (or >>>just the positions), and perhaps we can all benefit from the analyses. >>> >>>To start the ball rolling, here's a position from the game Amateur-LambChop, >>>played on ICC yesterday. For some reason, Amateur declined the easy move, >>>which would have won quickly, and played a tricky move that led to a loss. >>>On subsequent analysis, it took Amateur 9 ply to see the right move. During >>>the actual game (blitz), it only searched about 7 ply. I'm thinking this >>>might be some bug or other weirdness. Does your program have any trouble >>>finding the right move quickly? >>> >>>7k/2pn1Q2/2r4p/p1qpp3/Pp1b3N/1P1P2PP/2P1R2B/7K w - - Here is TDChess' analysis: f7d7 3.27 W: 3.27 d=2 n=227 s=17% n/q/e/t=65/21/63/0% p=82% b=0 mo=81% mtd=2 t=0.1 f7d7 nps=2850 c2c3 1.10 W: 1.69 d=3 n=1115 s=12% n/q/e/t=65/15/46/2% p=92% b=0 mo=85% mtd=5 t=0.1 c2c3 nps=12216 h4f5 2.30 W: 3.21 d=4 n=4756 s=8% n/q/e/t=65/16/29/4% p=95% b=0 mo=87% mtd=11 t=0.1 h4f5 nps=39373 f7d7 2.71 W: 3.12 d=5 n=16725 s=5% n/q/e/t=74/13/37/12% p=95% b=0 mo=86% mtd=4 t=0.3 f7d7 nps=71449 W: 3.43 d=6 n=60934 s=4% n/q/e/t=71/16/36/6% p=96% b=0 mo=86% mtd=9 t=0.7 f7d7 nps=105484 h4f5 5.09 W: 5.09 d=7 n=362279 s=3% n/q/e/t=62/22/48/4% p=96% b=0 mo=82% mtd=9 t=3.8 h4f5 nps=117881 W: 5.09 d=8 n=503981 s=3% n/q/e/t=68/19/43/6% p=97% b=0 mo=88% mtd=2 t=5.0 h4f5 nps=121209 f7d7 4.59 W: 4.84 d=9 n=1805900 s=3% n/q/e/t=67/19/40/8% p=96% b=0 mo=82% mtd=6 t=17.7 f7d7 nps=122162 W: 5.00 d=10 n=7114735 s=4% n/q/e/t=68/19/40/8% p=97% b=0 mo=84% mtd=7 t=68.7 f7d7 nps=123391 The fields are: side to move, score (in pawns), depth, total nodes searched, percentage of positions that had a "stage change" in the eval, n/q/e/t are all percentages: n= successful cutoffs out of all cutoffs, q=quiescence nodes, e=extended nodes, t=truncated nodes; p=pawn hash table hits, b= number of brain entries encountered in the search tree, mo= move ordering, mtd= number of calls of the mtd loop before convergence, t=time in seconds. >This is another interesting FEN. > >7k/2pn1Q2/2r4p/p1qppN2/Pp1b4/1P1P2PP/2P1R2B/7K b - - 2 51 > >This is the position after 51. Nf5 in the game. The problem here is to figure >out how long until your program thinks that white's advantage is much reduced. 9 ply. Here is TDchess' analysis for this one: d7f6 -0.83 B: -0.83 d=2 n=109 s=30% n/q/e/t=0/7/0/0% p=84% b=0 mo=85% mtd=2 t=0.0 d7f6 nps=4259 e5e4 -3.48 B: -2.99 d=3 n=1211 s=12% n/q/e/t=18/23/15/2% p=91% b=0 mo=80% mtd=8 t=0.0 e5e4 nps=37725 c5f8 -3.43 B: -0.62 d=4 n=4989 s=24% n/q/e/t=54/45/15/16% p=94% b=0 mo=85% mtd=12 t=0.1 c5f8 nps=79677 B: -1.66 d=5 n=10596 s=17% n/q/e/t=53/32/22/16% p=94% b=0 mo=88% mtd=7 t=0.2 c5f8 nps=93249 B: -5.03 d=6 n=72300 s=6% n/q/e/t=47/30/30/15% p=95% b=0 mo=80% mtd=10 t=0.8 c5f8 nps=111930 B: -5.34 d=7 n=240090 s=4% n/q/e/t=54/26/36/9% p=96% b=0 mo=84% mtd=5 t=3.1 c5f8 nps=98106 B: -3.23 d=8 n=470300 s=5% n/q/e/t=57/22/28/14% p=97% b=0 mo=85% mtd=14 t=5.3 c5f8 nps=108477 B: -0.61 d=9 n=1145340 s=6% n/q/e/t=58/21/25/15% p=96% b=0 mo=85% mtd=14 t=11.8 c5f8 nps=118617 B: -0.56 d=10 n=2150216 s=9% n/q/e/t=62/23/22/20% p=97% b=0 mo=85% mtd=7 t=21.9 c5f8 nps=121208 B: -0.46 d=11 n=5108021 s=8% n/q/e/t=64/20/21/19% p=97% b=0 mo=87% mtd=7 t=49.2 c5f8 nps=125118
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