Gerbil

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Gerbil, an open source chess engine under the GNU General Public License, written by Bruce Moreland, written for educational purposes. It has a decent search (null move pruning, hash tables) but a rudimentary evaluation.

=Features= Bruce on Gerbil :
 * 1) It is using 0x88 move generation.  The function is something under 200 lines long, which seems big, but there are a lot of comments and there's some repeated code.
 * 2) It is using vanilla windowed alpha-beta with no PVS or anything like that, and I plan to keep it this way, since that is clear and performs acceptably.
 * 3) It has a check extension. I think that is enough for now.  I may try to do some pruning in the quiescence search, which uses MVV/LVA.  I don't plan to write a static exchange evaluator.
 * 4) This is already a more or less fully functional winboard engine, an effort that consumed a whole bunch of time, not that Mann's standard is hard to write to. I just had to spend a lot of time messing with threads.

=Legal derivatives=
 * Cyrano

=See also=
 * Ferret
 * GopherCheck
 * Hamsters
 * LearningLemming
 * Rodent

=Forum Posts=
 * Bruce Moreland's Gerbil by Ricardo Gibert, CCC, June 09, 2001
 * Question about Gerbil by Artem Pyatakov, CCC, July 11, 2001
 * Re: Ferret/Gerbil question by Bruce Moreland, CCC, September 21, 2001
 * Movei-Gerbil in rhe endgame suite 20.5-9.5 and could be 21.5-8.5 by Uri Blass, CCC, January 01, 2006 » Movei

=External Links=

Chess Engine

 * Gerbil by Bruce Moreland archived by the Wayback Machine

Misc

 * Gerbil from Wikipedia
 * Gerbil (disambiguation) from Wikipedia

=References=

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