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Subject: Chess engine speed up tricks

Author: Pallav Nawani

Date: 09:26:36 02/15/05

Hi,

My chess engine, Natwarlal is very slow, getting 350KNPS on an Athlon 1700.
Crafty, on the other hand does an hefty 650K. What is the most important thing
for high NPS of the engine? There are a few speedup tricks that I know, and I am
not using them, but can anyone quantify the speedup in % provided by these,
and/or add some  new ideas?

1. Pawn hash (Natwarlal uses it, but not efficiently).
2. King hash
3. Eval cache
4. Lazy eval. Natwarlal dosen't use this, but then Natwarlal's eval is very
skimpy already!
5. Any other trick?

Thanks,
Pallav

• Re: Chess engine speed up tricks Dann Corbit 18:38:31 02/15/05
  • Re: Chess engine speed up tricks Pallav Nawani 21:39:03 02/15/05
• Re: Chess engine speed up tricks Charles Roberson 13:31:03 02/15/05
  • Re: Chess engine speed up tricks Pallav Nawani 18:34:51 02/15/05
  • Re: Chess engine speed up tricks Charles Roberson 15:27:35 02/15/05
    • Re: Chess engine speed up tricks Pallav Nawani 18:29:59 02/15/05
• Re: Chess engine speed up tricks Michel Langeveld 09:59:42 02/15/05
  • Random advice related to speed Scott Gasch 12:52:31 02/15/05
    • Re: Random advice related to speed Eric Oldre 21:33:25 02/15/05
      • Re: Random advice related to speed Scott Gasch 12:25:13 02/16/05
  • Re: Chess engine speed up tricks Eric Oldre 12:13:27 02/15/05
    • Re: Chess engine speed up tricks Anthony Cozzie 13:34:57 02/15/05
      • Re: Chess engine speed up tricks Dann Corbit 17:59:50 02/15/05
• Re: Chess engine speed up tricks Dann Corbit 09:32:37 02/15/05
  • Re: Chess engine speed up tricks Pallav Nawani 09:44:10 02/15/05
    • Re: Chess engine speed up tricks Tony Werten 22:37:20 02/15/05
    • Re: Chess engine speed up tricks Dann Corbit 16:33:12 02/15/05

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