Author: Andreas Guettinger
Date: 12:14:42 08/26/02
Go up one level in this thread
On August 26, 2002 at 12:52:40, Steffen Basting wrote: >Hello! >Some days ago, I posted about the bad branching factor in my chess program. >Here's the output of the starting position as an example: > >time depth nodes value principal variation >=============================================================================== >0 1 29 10 g1f3 >0 2 127 -6 b1c3 b8c6 >0 3 380 18 b1c3 b8c6 g1f3 >0 4 2141 0 b1c3 g8f6 g1f3 b8c6 >0 5 9174 16 b1c3 b8c6 g1f3 g8f6 e2e4 >1 6 54535 8 b1c3 d7d5 g1f3 b8c6 e2e4 g8f6 >7 7 408066 21 b1c3 d7d5 g1f3 d5d4 c3b5 b8c6 e2e4 >53 8 3220020 18 b1c3 c7c5 e2e4 b8c6 g1f3 e7e5 f1b5 g8e7 > >3220020 nodes, 53 seconds: 59630 nodes/sec >q-nodes: 2944182 evals: 2944182 >value: 18 >my move: b1c3 >principal variation: b1c3 c7c5 e2e4 b8c6 g1f3 e7e5 f1b5 g8e7 > Well, first of all, you qnodes are much to high compared to the total nodes. They should not mak more that about 50% of the total nodes in the starting position, because there are no many captures possible. Do you make extensions in the qnodes? Here is the qnodes/nodes relation from my engine in the starting position: Trying 60s 1 0.00 10 : d2d4 [21] 2 0.00 0 : d2d4 d7d5 [88] 3 0.01 10 : d2d4 d7d5 c1f4 [677] 4 0.05 0 : d2d4 d7d5 c1f4 c8f5 [3802] 5 0.41 8 : b1c3 e7e5 e2e4 f8c5 f1c4 [45680] 6 2.96 2 : e2e4 e7e5 g1f3 b8c6 f1b5 g8f6 [338313] 7 15.33 10 : e2e4 e7e5 f1c4 b8c6 g1f3 g8f6 b1c3 [2001916] PV: 7 e2e4 e7e5 f1c4 b8c6 g1f3 g8f6 b1c3 bestmove = e2e4, score = 10, ply = 8/24, time = 60.36 nodes = 7065600, qnodes = 2877902[40.0%], NPS = 117kNPS - Andy
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