Colibri is a suicide chess engine. It plays according to FICS rules (stalemate is a win for the player with the fewer pieces remaining -- variant 5 on Wikipedia).
The fun thing about suicide chess, from a software engineer's point of view, is that it appears to be solvable, which means a computer could produce a game tree ("proof") in which White wins regardless of Black's defense. Some lines, such as 1. e3 d5 or 1. e3 e5, are trivially solvable by average players. Other lines, like 1. e3 b5 took years of computing time from several different chess programs.
My aim in writing Colibri (aside from having fun and polishing my programming skills) is to tackle the remaining defenses for Black and find wins for White. I may end up connecting this program to FICS so it can play humans or other computers, but that is not my short-term goal. For example, I probably won't implement an alpha-beta algorithm.
My previous suicide chess engine was Nilatac, written mostly between 2001-2003. I decided to give it up and rewrite Colibri from scratch because Nilatac had several shortcomings:
Colibri is free software. You can browse the source code or download a copy with Subversion:
svn checkout http://voronet.francu.com/repos/colibri
I will seed the EGTB files on torrents once anybody asks. :-)
Copyright 2013 Catalin Francu
Colibri's source code is released under the GNU Affero General Public License.
Colibri's endgame tables are released under the Creative Commons Attribution-ShareAlike 3.0 Unported License.