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Subject: hash numbers requested: authors please read

Author: James Swafford

Date: 18:31:17 09/17/02



I'm skeptical about my hash efficiency - it seems to me I'm not
getting enough hits from my hash tables.

I wonder if some of you would post some numbers for me to compare
by running the following 3 positions:

r4k2/q4npp/P2P4/2p1R3/2N5/6PP/Q5K1/8 w - - bm Re7; id "ECM.1028";
7k/p7/1R5K/6r1/6p1/6P1/8/8 w - - b6b7;
r1bq1rk1/pp2bp1p/2p2np1/3p2B1/3P4/2NQ2N1/PPP2PPP/4RRK1 w - - bm Rxe7; id
"ECM.1068";

The first and last are from GCP's ECM-GCP suite and the second is
from WAC.

Anyway, here's what I'm getting (10 seconds per problem):

Position 1:  3931063 nodes,  318411 interior nodes.
          fail highs: 10866 (3%); fl: 9929 (3%); ex: 671 (0%)
          hash mvs played: 10660

Position 2:  4944963 nodes,  3102047 interior nodes.
          fh: 1531962 (49%); fl: 432594 (13%); ex: 2836 (0%)
          hash mvs played: 602039

Position 3: 3847265 nodes,  222358 interior nodes.
          fh: 3443 (1%); fl: 2926 (1%); ex: 151 (0%)
          hash mvs played: 11931

The ratios change very little if I run the positions at 30 seconds.

Thanks to anyone that takes the time... (which is hopefully a
positive number of people)...

--
James










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