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Subject: Help with malfunctioning hash tables

Author: Josh Levine

Date: 22:24:11 10/09/99


Hello,
  Josh Levine here.  First off, as a new user to the CCC I need to say, I LOVE
IT.  This is the best thing I've found yet.  Now on to business.

I have a program (Saboteur) which I introduced earlier.  I have strong
suspicions that the hash table(s) are not storing information properly.  There
was a thread here a while ago that I noticed where people were talking about
mate bounds and the position

/p/P5p/7p/7P/4kpK/// w

I am wondering how many hash table hits people get on this position and how many
nodes (per iteration.  here's mine:

score: 1020, nodes: 626, depth: 5
Best: f2 Kg2 Ke2 Kh1 f1=Q Kh2
score: 1020, nodes: 1112, depth: 6
Best: f2 Kg2 Ke2 Kh1 f1=Q Kh2 Qb1
score: 1150, nodes: 5066, depth: 7
Best: f2 Kg2 Ke2 Kh1 f1=Q Kh2 Qf4 Kh3 Qg4 Kh2 Qxh4
score: 1166, nodes: 16691, depth: 8
Best: f2 Kg2 Ke2 Kh1 f1=Q Kh2 Qf4 Kh3 Qg4 Kh2 Qxh4 Kg1
score: 1166, nodes: 77578, depth: 9
Best: f2 Kg2 Ke2 Kg3 f1=Q Kh2 Qf4
score: 1166, nodes: 193026, depth: 10
Best: f2 Kg2 Ke2 Kg3 f1=Q Kh2 Qf4 Kg2 Qf2 Kh3 Qf4 Kh2

Score: 9999988, Time: 59.996, NPS: 29329.
nodes: 1759648, depth: 11, table use: 30716

Best: f2 Kg2 Ke2 Kg3 f1=Q Kh2 g5 h4xg5 Kf3

Also, how do I stop the hashtable from truncating the PV?  I have tried lookng
up best moves from the hashtable when displaying/using the PV, but my threading
model doesn't really allow for that in a game situation (ugh...).
Thanks for any input :)

Josh Levine



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