LittleThought

a free UCI compatible chess engine by Nathan Thom, able to play Chess960. LittleThought uses a rotated bitboard based, fully incremental move generator, and applies a PVS based alpha-beta search with several tree shaping and pruning routines, such as singular extensions, late move reductions, and null move pruning, and 4-way probe transposition table with other smaller hash tables for caching calculations of pawns, materials, and evaluation. The killer- and history heuristic as well just in case IID improve move ordering. Up to 8 threads are supported for a YBWC based parallel search. So far, LittleThought played the NC3 2006 Australasian National Computer Chess Championship. || toc =Selected Games= NC3 2006, round 4, LittleThought - Fencer code [Event "NC3 2006"] [Site "RedHill, Canberra, Australia"] [Date "2006.08.20"] [Round "4"] [White "LittleThought"] [Black "Fencer"] [Result "1-0"]
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 * [[image:LittlethoughtNo2.jpg link="http://en.wikipedia.org/wiki/File:WLANL_-_Marjolein_Benard_-_Little_thought_No._2,_Qiangli_Liang_%282005%29_detail.jpg"]] ||~ || **LittleThought**,
 * Little thought No. 2 ||~ ||^ ||

1.e4 Nc6 2.d4 d5 3.exd5 Qxd5 4.Nf3 e6 5.a3 Bd7 6.Nc3 Qa5 7.Bd2 Qf5 8.Nb5 Rc8 9.Bd3 Qg4 10.h3 Qh5 11.g4 Qd5 12.c4 Ne5 13.Nxc7+ Rxc7 14.cxd5 Nxd3+ 15.Kf1 Nxb2 16.Qb3 Nc4 17.Bf4 Na5 18.Qb1 Rc4 19.Ne5 b6 20.Nxd7 Kxd7 21.Qb5+ Kd8 22.Bb8 Rc3 23.Bxa7 Nc4 24.Bxb6+ Nxb6 25.Qxb6+ Kd7 26.Re1 Bd6 27.Qb5+ Ke7 28.dxe6 fxe6 29.Qf5 e5 30.dxe5 Bxa3 31.Qg5+ 1-0 code

=See also=
 * LittleBlitzer
 * Thought

=Forum Posts=
 * [|Threading issue under Polyglot] by Nathan Thom, Winboard Forum, September 18, 2006 » Thread, Polyglot
 * [|LittleThought v1.01 released] by Nathan Thom, CCC, Jul 28, 2007
 * [|LittleThought 1.01 : 2157] by Patrick Buchmann, CCC, July 31, 2007
 * [|LittleThought 1.02 : 2240] by Patrick Buchmann, CCC, November 08, 2007
 * [|LittleThought 1.03 : 2229] by Patrick Buchmann, CCC, January 05, 2008
 * [|LittleThought 1.04 : 2344] by Patrick Buchmann, CCC, November 08, 2009
 * [|Little Thought 1.04 64-bit 2-CPU] by Gabor Szots, CCC, December 18, 2009
 * [|YBWC details] by Nathan Thom, CCC, December 31, 2009 » YBWC
 * [|LittleThought v1.05 released] by Nathan Thom, CCC, April 20, 2010
 * [|LittleThought 1.05 : 2403] by Patrick Buchmann, CCC, April 21, 2010
 * [|LittleThought 1.052 64-bit Gauntlets (CCRL 40/40)] by [|Aser Huerga], CCC, May 07, 2010

=External Links= > [|LittleBlitzer Chess Software]
 * [|LittleThought Chess Software]
 * [|LittleThought Chess Software - Change History]
 * [|NC3 2006 - List of Entries]
 * [|LittleThought 1.052 64-bit] in CCRL 40/40

=References= =What links here?= include page="LittleThought" component="backlinks" limit="40"
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