BigLion

a Chess Engine Communication Protocol aka WinBoard and UCI compliant chess engine by Matthias Gemuh, written in C++ using [|Borland] [|C++Builder 5.0], first released in April 2002 as announced by Frank Quisinsky. Since 2.23w in fall 2005, BigLion is able to play Chess960. || toc =Features=
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 * [[image:206px-Sultan_the_Barbary_Lion.jpg link="https://commons.wikimedia.org/wiki/File:Sultan_the_Barbary_Lion.jpg"]] ||~ || **BigLion**,
 * Sultan the Barbary Lion ||~ ||^ ||

Board Representation

 * Bitboards
 * Rotated Bitboards

Search

 * Iterative Deepening
 * Aspiration Windows
 * PVS
 * Selectivity
 * Null Move Pruning
 * Fractional Extensions
 * Razoring
 * Move Ordering
 * Hash Move
 * Internal Iterative Deepening
 * Killer Heuristic
 * History Heuristic
 * Static Exchange Evaluation

Evaluation

 * Material
 * Pawn Structure
 * Bishop Pair
 * Rook on Open File
 * Rook (Queen) on 7th
 * Center Control
 * Mobility
 * Trapped Bishop
 * Connectivity
 * Early Queen
 * King Safety
 * Pawn Shield
 * King Tropism
 * Attacking King Zone
 * Castling rights
 * Forks
 * Pins

Hash Tables

 * Two-tier Transposition Table in Main Search
 * Always Replace Transposition Table in Quiescence Search
 * Evaluation Hash Table
 * Pawn Hash Table
 * Move Lists

=See also=
 * ChessGUI
 * Lion
 * Mammal
 * Taktix

=Forum Posts=

2002 ...

 * [|WB/UCI BigLion by Matthias Gemuh is available!] by Frank Quisinsky, Winboard Forum, April 23, 2002
 * [|BigLion 0.3] by Matthias Gemuh, Winboard Forum, April 27, 2002
 * [|BigLion now has Homepage] by Matthias Gemuh, Winboard Forum, April 30, 2002
 * [|BigLion 0.5] by Matthias Gemuh, Winboard Forum, May 02, 2002
 * [|BigLion 1.0] by Matthias Gemuh, Winboard Forum, July 13, 2002
 * [|BigLion against world elite] by Matthias Gemuh, Winboard Forum, August 04, 2002
 * [|BigLion 1.3] by Matthias Gemuh, Winboard Forum, October 11, 2002
 * [|BigLion and Tournaments] by Matthias Gemuh, CCC, October 31, 2002
 * [|BigLion and fine 70] by Sune Fischer, Winboard Forum, December 09, 2002 » Lasker-Reichhelm Position
 * 2003**
 * [|BigLion says Good Bye] by Matthias Gemuh, Winboard Forum, March 01, 2003
 * [|BigLion: Now he too can cheat !] by Matthias Gemuh, Winboard Forum, May 07, 2003
 * [|BigLion+Taktix : no more updates] by Matthias Gemuh, Winboard Forum, June 09, 2003
 * [|For Matthias: a question about Big Lion/Taktix] by Telmo Escobar, Winboard Forum, June 21, 2003
 * [|BigLion loses 100 Elo points and also 50% speed] by Matthias Gemuh, Winboard Forum, August 01, 2003
 * 2004**
 * [|About BigLion 2.23n (and AEGT)] by Matthias Gemuh, Winboard Forum, July 28, 2004

2005 ...
> [|BigLion 2.23w and Taktix 2.23w] by Matthias Gemuh, CCC, November 24, 2005
 * [|Chess960 in Fritz9GUI and Winboard_frc] by Matthias Gemuh, CCC, November 24, 2005
 * [|BigLion 2.23x : 2017] by Patrick Buchmann, CCC, October 06, 2007
 * [|BigLion80] by Matthias Gemuh, CCC, January 16, 2008
 * [|BigLion and burn out] by Matthias Gemuh, CCC, July 17, 2009
 * [|CCC Forum vs BigLion chess960] by Spock, CCC, September 14, 2009

2010 ...

 * [|BigLion and his clan have moved] by Matthias Gemuh, CCC, July 14, 2014

=External Links=

Chess Engine

 * [|BigLion Homepage]
 * [|BigLion] in CCRL 40/40

Misc
> media type="youtube" key="_xCUPx4JEws"
 * [|Lion from Wikipedia]
 * [|Barbary lion from Wikipedia]
 * [|Lion (disambiguation) from Wikipedia]
 * Manu Dibango - Lion of Africa, at the [|Barbican Centre], [|London], March 2007, [|YouTube] Video

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