https://www.chessprogramming.org/index.php?title=Reductions&feed=atom&action=history
Reductions - Revision history
2024-03-28T16:59:29Z
Revision history for this page on the wiki
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https://www.chessprogramming.org/index.php?title=Reductions&diff=25523&oldid=prev
GerdIsenberg at 07:49, 8 July 2021
2021-07-08T07:49:04Z
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=72981 Pruning / reduction depending on king safety] by [[Vivien Clauzon]], [[CCC]], February 02, 2020 » [[King Safety]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=72981 Pruning / reduction depending on king safety] by [[Vivien Clauzon]], [[CCC]], February 02, 2020 » [[King Safety]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=74769 An alternative to IID] by [[Ed Schroder|Ed Schröder]], [[CCC]], August 13, 2020 » [[Internal Iterative Deepening|IID]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=74769 An alternative to IID] by [[Ed Schroder|Ed Schröder]], [[CCC]], August 13, 2020 » [[Internal Iterative Deepening|IID]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=77644 Futility reductions] by [[Jost Triller]], [[CCC]], July 05, 2021 »  [[Futility Pruning]]</ins></div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=External Links=</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=External Links=</div></td></tr>
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GerdIsenberg
https://www.chessprogramming.org/index.php?title=Reductions&diff=20732&oldid=prev
GerdIsenberg at 15:02, 14 August 2020
2020-08-14T15:02:42Z
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 15:02, 14 August 2020</td>
</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l51" >Line 51:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=72981 Pruning / reduction depending on king safety] by [[Vivien Clauzon]], [[CCC]], February 02, 2020 » [[King Safety]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=72981 Pruning / reduction depending on king safety] by [[Vivien Clauzon]], [[CCC]], February 02, 2020 » [[King Safety]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=74769 An alternative to IID] by [[Ed Schroder|Ed Schröder]], [[CCC]], August 13, 2020 » [[Internal Iterative Deepening|IID]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=External Links=</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=External Links=</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://en.wikipedia.org/wiki/Reduction Reduction from Wikipedia]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://en.wikipedia.org/wiki/Reduction Reduction from Wikipedia]</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.top-5000.nl/authors/rebel/chess840.htm#REDUCTIONS Programmer Corner - How Rebel Plays Chess - Reductions] by [[Ed Schroder|Ed Schröder]], [http://members.home.nl/matador/Inside%20Rebel.pdf pdf reprint]</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>* [<ins class="diffchange diffchange-inline">https://web.archive.org/web/20120527155902/</ins>http://www.top-5000.nl/authors/rebel/chess840.htm#REDUCTIONS Programmer Corner - How Rebel Plays Chess - Reductions] by [[Ed Schroder|Ed Schröder]] <ins class="diffchange diffchange-inline">([https://en.wikipedia.org/wiki/Wayback_Machine Wayback Machine])</ins>, [http://members.home.nl/matador/Inside%20Rebel.pdf pdf reprint]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=References=</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=References=</div></td></tr>
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GerdIsenberg
https://www.chessprogramming.org/index.php?title=Reductions&diff=17837&oldid=prev
GerdIsenberg at 22:51, 2 February 2020
2020-02-02T22:51:52Z
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 22:51, 2 February 2020</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum/viewtopic.php?t=61425 Floating Move Reduction] by [[Dennis Sceviour]], [[CCC]], September 14, 2016</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum/viewtopic.php?t=61425 Floating Move Reduction] by [[Dennis Sceviour]], [[CCC]], September 14, 2016</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum/viewtopic.php?t=65586 EMR based on Null Move threat] by [[Michael Sherwin]], [[CCC]], October 30, 2017</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [http://www.talkchess.com/forum/viewtopic.php?t=65586 EMR based on Null Move threat] by [[Michael Sherwin]], [[CCC]], October 30, 2017</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">==2020 ...==</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [http://www.talkchess.com/forum3/viewtopic.php?f=7&t=72981 Pruning / reduction depending on king safety] by [[Vivien Clauzon]], [[CCC]], February 02, 2020 » [[King Safety]]</ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=External Links=</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>=External Links=</div></td></tr>
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GerdIsenberg
https://www.chessprogramming.org/index.php?title=Reductions&diff=12321&oldid=prev
GerdIsenberg at 10:19, 24 May 2019
2019-05-24T10:19:13Z
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<td colspan="2" style="background-color: white; color:black; text-align: center;">Revision as of 10:19, 24 May 2019</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [[Null Move Reductions]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [[Null Move Reductions]]</div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">* [[RankCut]]</ins></div></td></tr>
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GerdIsenberg
https://www.chessprogramming.org/index.php?title=Reductions&diff=1280&oldid=prev
GerdIsenberg: Created page with "'''Home * Search * Selectivity * Reductions''' '''Reductions''' (as opposed to pruning),<br/> a class of search heuristics that decrease the..."
2018-04-29T17:11:15Z
<p>Created page with "'''<a href="/Main_Page" title="Main Page">Home</a> * <a href="/Search" title="Search">Search</a> * <a href="/Selectivity" title="Selectivity">Selectivity</a> * Reductions''' '''Reductions''' (as opposed to <a href="/Pruning" title="Pruning">pruning</a>),<br/> a class of search heuristics that decrease the..."</p>
<p><b>New page</b></p><div>'''[[Main Page|Home]] * [[Search]] * [[Selectivity]] * Reductions'''<br />
<br />
'''Reductions''' (as opposed to [[Pruning|pruning]]),<br/><br />
a class of search heuristics that decrease the [[Depth|depth]] to which a certain branch of the [[Search Tree|tree]] is searched, also interpreted as negative [[Extensions|extension]].<br />
<br />
=Recursive Reductions=<br />
* [[Late Move Reductions]] - LMR<br />
* [[Fail-High Reductions]] - FHR<br />
* [[Null Move Reductions]]<br />
<br />
=Near the Tips=<br />
* [[Razoring]]<br />
<br />
=Pruning after a reduced Search=<br />
Some dynamic pruning techniques base their [[Pruning|pruning]] decision on a reduced search by [[Depth Reduction R|factor R]], also applied recursively:<br />
* [[Null Move Pruning]]<br />
* [[Multi-Cut]]<br />
<br />
A none recursive pruning based on reduction at some fixed depth is applied by:<br />
* [[ProbCut]]<br />
<br />
=See also=<br />
* [[Pruning]]<br />
* [[Extensions]]<br />
<br />
=Forum Posts=<br />
==1998 ...==<br />
* [https://www.stmintz.com/ccc/index.php?id=21017 A new selective heuristic?] by [[Frank Schneider]], [[CCC]], June 21, 1998<br />
==2000 ...==<br />
* [https://www.stmintz.com/ccc/index.php?id=338851 Evaluation-based Reductions and/or Extensions] by [[Tom Likens]], [[CCC]], December 28, 2003 » [[Extensions]]<br />
* [https://www.stmintz.com/ccc/index.php?id=356488 extensions + reductions + pruning = confusion] by [[Johan de Koning]], [[CCC]], March 24, 2004 (was [https://www.stmintz.com/ccc/index.php?id=356109 Shredder 8 secret: search depth?])<br />
==2005 ...==<br />
* [http://www.open-aurec.com/wbforum/viewtopic.php?t=2300 Reductions and null move refutations] by [[Tord Romstad]], [[Computer Chess Forums|Winboard Forum]], April 18, 2005 » [[Null Move Pruning]]<br />
* [https://www.stmintz.com/ccc/index.php?id=461958 Has anyone tested Gambit Fruit with Rebel Reductions on?] by [[Ryan Benitez|Ryan B.]], [[CCC]], November 15, 2005 » [[Rebel]], [[Gambit Fruit]] <ref>[http://www.top-5000.nl/authors/rebel/chess840.htm#REDUCTIONS Programmer Corner - How Rebel Plays Chess - Reductions] by [[Ed Schroder|Ed Schröder]], [http://members.home.nl/matador/Inside%20Rebel.pdf pdf reprint]</ref><br />
* [http://www.open-aurec.com/wbforum/viewtopic.php?f=4&t=6066 Reducing King Moves?] by [[Mark Lefler|mjlef]], [[Computer Chess Forums|Winboard Forum]], January 03, 2007<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=19316 Toga/Glaurung/Strelka Prunings/Reductions] by [[Edsel Apostol]], [[CCC]], January 31, 2008 » [[Toga]], [[Glaurung]], [[Strelka]], [[Pruning]]<br />
==2010 ...==<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=40100 Reducing/Pruning Bad Captures (SEE < 0)] by [[Edsel Apostol]], [[CCC]], August 19, 2011 » [[Static Exchange Evaluation|SEE]]<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=44844 Reductions from internal iterative deepening] by [[Evert Glebbeek]], [[CCC]], August 20, 2012 » [[Internal Iterative Deepening]]<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=45624 Houdini 3 reducing the depth feature] by Maurizio Maglio, [[CCC]], October 17, 2012 » [[Houdini]]<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=50907 Pruning in PV nodes] by [[Sergei Markoff|Sergei S. Markoff]], [[CCC]], January 14, 2014 » [[Root]], [[Node Types]]<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=52727 variable reductions] by [[Robert Hyatt]], [[CCC]], June 22, 2014<br />
==2015 ...==<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=57697 Ratio reduction] by [[Steven Edwards]], [[CCC]], September 20, 2015 » [[Late Move Reductions]], [[Symbolic]]<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=57747 Reduction Research Question] by [[Dennis Sceviour]], [[CCC]], September 25, 2015<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=60240 Reductions] by [[Harm Geert Muller]], [[CCC]], May 22, 2016<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=60868 EMR & EMP] by [[Michael Sherwin]], [[CCC]], July 19, 2016<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=61425 Floating Move Reduction] by [[Dennis Sceviour]], [[CCC]], September 14, 2016<br />
* [http://www.talkchess.com/forum/viewtopic.php?t=65586 EMR based on Null Move threat] by [[Michael Sherwin]], [[CCC]], October 30, 2017<br />
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=External Links=<br />
* [https://en.wikipedia.org/wiki/Reduction Reduction from Wikipedia]<br />
* [http://www.top-5000.nl/authors/rebel/chess840.htm#REDUCTIONS Programmer Corner - How Rebel Plays Chess - Reductions] by [[Ed Schroder|Ed Schröder]], [http://members.home.nl/matador/Inside%20Rebel.pdf pdf reprint]<br />
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=References=<br />
<references /><br />
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'''[[Selectivity|Up one level]]'''</div>
GerdIsenberg