by Ferdinand Mosca
An engine that can play Los Alamos chess variant, similar to normal chess but on 6x6 board size, no bishops, no castle, no ep capture and no 2-step pawn push.
Computer Chess Forum
on Wed 28 Mar 2012, 5:50 pm by
on Wed 28 Mar 2012, 5:56 pm by
on Mon 02 Apr 2012, 3:19 pm by
on Tue 10 Apr 2012, 6:57 pm by
Los Alamos chess variant
April 10, 2012
Liit is an engine that can only play Los Alamos chess variant. This variant
is similar to chess except that it is played in 6x6 board, no bishops, no castle,
no ep capture and no double-step pawn pushes. Use a winboard gui and install this
engine to have a comfortable playing board. Read also the included FAQ file for
some other info.
Thanks to Michael for the help in optimizing the evaluation parameter
which resulted in a stronger play of the engine. This engine has existed due to
him encouraging to try this variant. Thanks also to H.G. Muller for the further
development of winboard, where this engine has been primarily tested.
Liit is based on Deuterium. It supports winboard protocol with some important
commands implemented such as setboard, analyze, new, go, include/exclude, pondering and others.
It can do multipv while at the same time able to exclude moves, useful for analysis.
Strength improvement is taken basically from mobility evaluation, and king safety has little
effect on this variant as proven from test.
1. Liit v1.0.exe
3. liit FAQ.txt
4. Liit v1.0 readme.txt
E. Development Log
Liit v1.0 (10-April-2012)
1. Rewrite evaluation from deuterium.
2. Revised routines to play at 6x6 board.
3. Disable pawn hashing
4. Added multipv option
5. Added exclude and include command for analysis
6. Added book support
1. No endgame tablebase
2. No Learning
G. Todo list
1. Improve evaluation.
2. Tune search reductions and prunings.
3. Expand and improve opening books.
4. Add learning