Difference between revisions of "Reductions"
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==2020 ...== | ==2020 ...== | ||
* [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]] | * [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]] | ||
| + | * [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]] | ||
=External Links= | =External Links= | ||
* [https://en.wikipedia.org/wiki/Reduction Reduction from Wikipedia] | * [https://en.wikipedia.org/wiki/Reduction Reduction from Wikipedia] | ||
| − | * [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] | + | * [https://web.archive.org/web/20120527155902/http://www.top-5000.nl/authors/rebel/chess840.htm#REDUCTIONS Programmer Corner - How Rebel Plays Chess - Reductions] by [[Ed Schroder|Ed Schröder]] ([https://en.wikipedia.org/wiki/Wayback_Machine Wayback Machine]), [http://members.home.nl/matador/Inside%20Rebel.pdf pdf reprint] |
=References= | =References= | ||
Revision as of 17:02, 14 August 2020
Home * Search * Selectivity * Reductions
Reductions (as opposed to pruning),
a class of search heuristics that decrease the depth to which a certain branch of the tree is searched, also interpreted as negative extension.
Contents
Recursive Reductions
Near the Tips
Pruning after a reduced Search
Some dynamic pruning techniques base their pruning decision on a reduced search by factor R, also applied recursively:
A none recursive pruning based on reduction at some fixed depth is applied by:
See also
Forum Posts
1998 ...
- A new selective heuristic? by Frank Schneider, CCC, June 21, 1998
2000 ...
- Evaluation-based Reductions and/or Extensions by Tom Likens, CCC, December 28, 2003 » Extensions
- extensions + reductions + pruning = confusion by Johan de Koning, CCC, March 24, 2004 (was Shredder 8 secret: search depth?)
2005 ...
- Reductions and null move refutations by Tord Romstad, Winboard Forum, April 18, 2005 » Null Move Pruning
- Has anyone tested Gambit Fruit with Rebel Reductions on? by Ryan B., CCC, November 15, 2005 » Rebel, Gambit Fruit [1]
- Reducing King Moves? by mjlef, Winboard Forum, January 03, 2007
- Toga/Glaurung/Strelka Prunings/Reductions by Edsel Apostol, CCC, January 31, 2008 » Toga, Glaurung, Strelka, Pruning
2010 ...
- Reducing/Pruning Bad Captures (SEE < 0) by Edsel Apostol, CCC, August 19, 2011 » SEE
- Reductions from internal iterative deepening by Evert Glebbeek, CCC, August 20, 2012 » Internal Iterative Deepening
- Houdini 3 reducing the depth feature by Maurizio Maglio, CCC, October 17, 2012 » Houdini
- Pruning in PV nodes by Sergei S. Markoff, CCC, January 14, 2014 » Root, Node Types
- variable reductions by Robert Hyatt, CCC, June 22, 2014
2015 ...
- Ratio reduction by Steven Edwards, CCC, September 20, 2015 » Late Move Reductions, Symbolic
- Reduction Research Question by Dennis Sceviour, CCC, September 25, 2015
- Reductions by Harm Geert Muller, CCC, May 22, 2016
- EMR & EMP by Michael Sherwin, CCC, July 19, 2016
- Floating Move Reduction by Dennis Sceviour, CCC, September 14, 2016
- EMR based on Null Move threat by Michael Sherwin, CCC, October 30, 2017
2020 ...
- Pruning / reduction depending on king safety by Vivien Clauzon, CCC, February 02, 2020 » King Safety
- An alternative to IID by Ed Schröder, CCC, August 13, 2020 » IID
External Links
- Reduction from Wikipedia
- Programmer Corner - How Rebel Plays Chess - Reductions by Ed Schröder (Wayback Machine), pdf reprint
