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 [1]. So far, LittleThought played the NC3 2006 Australasian National Computer Chess Championship.
Little thought No. 2 [2]

Selected Games

[Event "NC3 2006"]
[Site "RedHill, Canberra, Australia"]
[Date "2006.08.20"]
[Round "4"]
[White "LittleThought"]
[Black "Fencer"]
[Result "1-0"]
 
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

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

• LittleThought Chess Software
• LittleThought Chess Software - Change History
  LittleBlitzer Chess Software
• NC3 2006 - List of Entries
• LittleThought 1.052 64-bit in CCRL 40/40

References

1. ^ LittleThought Chess Software
2. ^ Little thought No. 2 detail by Qiangli Liang, from Little thought No. 2, Qiangli Liang (2005) detail | Flickr - Fotosharing! by Marjolein Benard
3. ^ NC3 2006 - Final Standing 2006 Games

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