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Created page with "'''Home * Engines * Xpdnt''' '''Xpdnt''',<br/> an open source chess engine by David B. Weller, written in C and compliant..."
'''[[Main Page|Home]] * [[Engines]] * Xpdnt'''
'''Xpdnt''',<br/>
an [[:Category:Open Source|open source chess engine]] by [[David B. Weller]], written in [[C]] and compliant to the [[Chess Engine Communication Protocol]].
Already announced in 2005, Xpdnt was first released in April 2006 <ref>[http://www.open-aurec.com/wbforum/viewtopic.php?f=4&t=4664&p=24174 Beta Testers needed] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], April 16, 2006</ref>,
the last recent update appeared in October 2009 <ref>[http://www.talkchess.com/forum/viewtopic.php?t=30539 The Gaviota Saga] by [[Graham Banks]], [[CCC]], November 09, 2009</ref>.
=Features=
<ref>based on the sources</ref>
==[[Board Representation]]==
* [[Vector Attacks|16x16 Vector Attacks]]
* [[Piece-Lists]]
==[[Search]]==
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Principal Variation Search]]
* [[Transposition Table]]
* [[Selectivity]]
** [[Quiescence Search]]
** [[Delta Pruning]]
** [[Futility Pruning]]
** [[Mate Distance Pruning]]
** [[Null Move Pruning]]
** [[Razoring]]
** [[Check Extensions]]
** [[One Reply Extensions]]
** [[Mate Threat Extensions]]
** [[Passed Pawn Extensions|Pawn to 7th Rank Extensions]]
* [[Move Ordering]]
** [[Killer Heuristic]]
** [[History Heuristic]]
** [[Internal Iterative Deepening]]
** [[Static Exchange Evaluation]]
==[[Evaluation]]==
* [[Material]]
* [[Trapped Pieces]]
* [[Outposts]]
* [[Mobility]]
* [[Piece-Square Tables]]
* [[Pawn Structure]]
** [[Passed Pawn|Passed Pawns]]
** [[Weak Pawns]]
* [[King Safety]]
** [[King Safety#PawnShield|Pawn Shield]]
** [[King Safety#PawnStorm|Pawn Storm]]
** [[King Safety#KingTropism|Tropism]]
** [[King Safety#SquareControl|Square Control]]
** [[Rook]] or [[Queen]] on [[Open File|open files]] near the [[King]]
** [[King Safety#Scaling|Scaling by Material]]
* [[King Centralization]] in the [[Endgame]]
=See also=
* [[GES]]
=Forum Posts=
==2005 ...==
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=4&t=3370&p=16850 NPS] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], August 27, 2005
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=4&t=4664&p=24174 Beta Testers needed] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], April 16, 2006
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=4927&p=25313 New version of Xpdnt] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], June 02, 2006
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=5899&p=28499 XPDNT 061120 released] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], November 20, 2006
* [http://www.talkchess.com/forum/viewtopic.php?t=17186 xpdnt_071017 released] by [[David B. Weller]], [[CCC]], October 17, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=17880 Xpdnt 071115 win32 Intel compiler 10 p.g.o available] by [[Jim Ablett]], [[CCC]], November 15, 2007
==2008 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=19517 Xpdnt 080209] by [[David B. Weller]], [[CCC]], February 10, 2008
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=7128&p=32732 Xpdnt 080209 by David B. Weller - Win32 JA build] by [[Jim Ablett]], [[Computer Chess Forums|Winboard Forum]], February 10, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=22395 Xpdnt_080716] by [[David B. Weller]], [[CCC]], July 16, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=23617 Xpdnt 080904] by [[David B. Weller]], [[CCC]], September 10, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=24275 Xpdnt 080927] by [[David B. Weller]], [[CCC]], October 09, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=28889 xpdnt 090704 released] by [[David B. Weller]], [[CCC]], July 10, 2009
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=50482&p=191657 Xpdnt_091007 Released] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], October 14, 2009
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=35857 Xpdnt 091007 - CCRL 40/4 Result] by [[Adam Hair]], [[CCC]], August 22, 2010
=External Links=
* [http://www.opraus.com/ai/ Xpdnt: Free chess engine]
* [http://kirr.homeunix.org/chess/engines/Jim%20Ablett/XPDNT/ Index of /chess/engines/Jim Ablett/XPDNT] compiled by [[Jim Ablett]], hosted by [[Kirill Kryukov]]
* [http://ccrl.chessdom.com/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=Xpdnt%20091007#Xpdnt_091007 Xpdnt 091007] in [[CCRL|CCRL 40/4]]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:WinBoard]]
[[Category:XBoard]]
'''Xpdnt''',<br/>
an [[:Category:Open Source|open source chess engine]] by [[David B. Weller]], written in [[C]] and compliant to the [[Chess Engine Communication Protocol]].
Already announced in 2005, Xpdnt was first released in April 2006 <ref>[http://www.open-aurec.com/wbforum/viewtopic.php?f=4&t=4664&p=24174 Beta Testers needed] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], April 16, 2006</ref>,
the last recent update appeared in October 2009 <ref>[http://www.talkchess.com/forum/viewtopic.php?t=30539 The Gaviota Saga] by [[Graham Banks]], [[CCC]], November 09, 2009</ref>.
=Features=
<ref>based on the sources</ref>
==[[Board Representation]]==
* [[Vector Attacks|16x16 Vector Attacks]]
* [[Piece-Lists]]
==[[Search]]==
* [[Iterative Deepening]]
* [[Aspiration Windows]]
* [[Principal Variation Search]]
* [[Transposition Table]]
* [[Selectivity]]
** [[Quiescence Search]]
** [[Delta Pruning]]
** [[Futility Pruning]]
** [[Mate Distance Pruning]]
** [[Null Move Pruning]]
** [[Razoring]]
** [[Check Extensions]]
** [[One Reply Extensions]]
** [[Mate Threat Extensions]]
** [[Passed Pawn Extensions|Pawn to 7th Rank Extensions]]
* [[Move Ordering]]
** [[Killer Heuristic]]
** [[History Heuristic]]
** [[Internal Iterative Deepening]]
** [[Static Exchange Evaluation]]
==[[Evaluation]]==
* [[Material]]
* [[Trapped Pieces]]
* [[Outposts]]
* [[Mobility]]
* [[Piece-Square Tables]]
* [[Pawn Structure]]
** [[Passed Pawn|Passed Pawns]]
** [[Weak Pawns]]
* [[King Safety]]
** [[King Safety#PawnShield|Pawn Shield]]
** [[King Safety#PawnStorm|Pawn Storm]]
** [[King Safety#KingTropism|Tropism]]
** [[King Safety#SquareControl|Square Control]]
** [[Rook]] or [[Queen]] on [[Open File|open files]] near the [[King]]
** [[King Safety#Scaling|Scaling by Material]]
* [[King Centralization]] in the [[Endgame]]
=See also=
* [[GES]]
=Forum Posts=
==2005 ...==
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=4&t=3370&p=16850 NPS] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], August 27, 2005
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=4&t=4664&p=24174 Beta Testers needed] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], April 16, 2006
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=4927&p=25313 New version of Xpdnt] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], June 02, 2006
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=5899&p=28499 XPDNT 061120 released] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], November 20, 2006
* [http://www.talkchess.com/forum/viewtopic.php?t=17186 xpdnt_071017 released] by [[David B. Weller]], [[CCC]], October 17, 2007
* [http://www.talkchess.com/forum/viewtopic.php?t=17880 Xpdnt 071115 win32 Intel compiler 10 p.g.o available] by [[Jim Ablett]], [[CCC]], November 15, 2007
==2008 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=19517 Xpdnt 080209] by [[David B. Weller]], [[CCC]], February 10, 2008
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=7128&p=32732 Xpdnt 080209 by David B. Weller - Win32 JA build] by [[Jim Ablett]], [[Computer Chess Forums|Winboard Forum]], February 10, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=22395 Xpdnt_080716] by [[David B. Weller]], [[CCC]], July 16, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=23617 Xpdnt 080904] by [[David B. Weller]], [[CCC]], September 10, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=24275 Xpdnt 080927] by [[David B. Weller]], [[CCC]], October 09, 2008
* [http://www.talkchess.com/forum/viewtopic.php?t=28889 xpdnt 090704 released] by [[David B. Weller]], [[CCC]], July 10, 2009
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=2&t=50482&p=191657 Xpdnt_091007 Released] by [[David B. Weller]], [[Computer Chess Forums|Winboard Forum]], October 14, 2009
==2010 ...==
* [http://www.talkchess.com/forum/viewtopic.php?t=35857 Xpdnt 091007 - CCRL 40/4 Result] by [[Adam Hair]], [[CCC]], August 22, 2010
=External Links=
* [http://www.opraus.com/ai/ Xpdnt: Free chess engine]
* [http://kirr.homeunix.org/chess/engines/Jim%20Ablett/XPDNT/ Index of /chess/engines/Jim Ablett/XPDNT] compiled by [[Jim Ablett]], hosted by [[Kirill Kryukov]]
* [http://ccrl.chessdom.com/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=Xpdnt%20091007#Xpdnt_091007 Xpdnt 091007] in [[CCRL|CCRL 40/4]]
=References=
<references />
'''[[Engines|Up one Level]]'''
[[Category:Open Source]]
[[Category:WinBoard]]
[[Category:XBoard]]
