Author: scott farrell
Date: 07:24:31 09/11/02
Go up one level in this thread
On September 11, 2002 at 08:09:52, Steffen Basting wrote: Hi, A few suggestions- your q-nodes are way too high in comparison to your nodes. I get about 6%-15% of totals nodes, you have the opposite. I fixed this by "stand=pat" code in my qsearch. What is your code for hashtable? What are you storing? What is you condition to return a value from the hashtable? Scott >Hello! >I've got some problems with my hashtable... >Here's the output of the starting position: > >time depth nodes value principal variation >=============================================================================== >0 1 24 -10 g1f3 >0 2 66 -11 g1f3 - >0 2 130 -28 g1f3 g8f6 >0 3 134 -27 g1f3 + >0 3 719 -4 g1f3 g8f6 b1c3 >0 4 722 -3 g1f3 + >0 4 895 -5 g1f3 - >0 4 4027 -22 g1f3 g8f6 b1c3 b8c6 >0 5 6229 -21 g1f3 + >0 5 18882 -7 g1f3 g8f6 b1c3 b8c6 e2e4 >1 6 22129 -8 g1f3 - >1 6 85215 -21 d2d4 g8f6 g1f3 d7d5 b1c3 b8c6 >2 7 198553 -20 d2d4 + >3 7 518883 -7 e2e4 b8c6 g1f3 g8f6 b1c3 d7d5 f1d3 >8 8 600111 -8 e2e4 - >9 8 4135936 -14 g1f3 g8f6 b1c3 b8c6 d2d4 e7e6 c1g5 d7d5 >56 9 7292704 -13 g1f3 + >705603 nodes, 101 seconds: 71497 nodes/sec >q-nodes: 6587101 evals: 6587101 >hash hits: 168 hash alpha cut: 106 hash beta cut: 0 >value: -13 >my move: g1f3 > >And another one from the following position: >[D]8/5ppp/8/5PPP/8/k7/8/K7 w - - 0 1 > >time depth nodes value principal variation >=============================================================================== >1 9 57531 20 a1b1 - >1 9 107320 19 a1b1 a3b4 h5h6 g7h6 g5h6 f7f6 b1c1 b4b3 >c1b1 >2 10 132473 20 a1b1 + >2 10 225075 24 a1b1 a3b4 b1c2 b4c5 h5h6 g7h6 g5h6 f7f6 >c2c1 c5c4 >2 11 258326 25 a1b1 + >3 11 531269 688 g5g6 h7g6 f5f6 g7f6 h5h6 f6f5 h6h7 f5f4 >h7h8Q f7f5 a1b1 >5 12 569305 687 g5g6 - >5 12 2047277 689 a1b2 a3b2 b2a3 a3a2 a2a3 b2a1 a1a2 a2b2 >b2a2 b3b2 b1b2 b2b1 b1b2 + >16 12 2898223 695 g5g6 h7g6 f5f6 g7f6 h5h6 f6f5 h6h7 f5f4 >h7h8Q f7f6 h8a8 a3b4 b1b2 >22 13 3236424 696 g5g6 + >25 13 3988875 698 g5g6 h7g6 f5f6 g7f6 h5h6 f6f5 h6h7 a3b4 >h7h8Q f7f6 h8g8 g6g5 g8e8 >1138587 nodes, 31 seconds: 124652 nodes/sec >q-nodes: 2850288 evals: 2850288 >hash hits: 424 hash alpha cut: 318 hash beta cut: 0 >value: 698 >my move: g5g6 > >Something is wrong - I simply don't find the mistake...Have a look at the line >of depth 12 for example - if the search had stopped at this point, my program >would had lost in a won position with a positive score. >Any suggestions - what might be the mistake? > >Thanks, Steffen
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