Search Explosion
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A Search Explosion or node count explosion refers to a huge effective branching factor in iterative deepening, most often caused by move ordering suddenly becomes worse due to new refutations found at higher depth, by re-searching the root after aspiration window fail-high or fail-low, and/or enabling too many extensions and checks in quiescence search.
Contents
See also
- Check Extensions
- Extensions
- Mate Threat Extensions
- Odd-Even Effect
- Quiescence Search
- Search Instability
- Time Management
Leonid's Positions
Chess positions posted by Leonid Liberman in CCC let many engines "explode" [2]
♛ ♚ ♛ ♞♛♞ ♝ ♞ ♙ ♞ ♝ ♜♞♜ ♕ ♘♕ ♕♘ ♕ ♕ ♗ ♖♕♖ ♗ ♕ ♔ ♕ |
q2k2q1/2nqn2b/1n1P1n1b/2rnr2Q/1NQ1QN1Q/3Q3B/2RQR2B/Q2K2Q1 w - - [3]
Forum Posts
2000 ...
- Explosion in WAC 102 by David Rasmussen, CCC, January 11, 2002
- No explosions by Matthias Gemuh, CCC, January 11, 2002
- Threat Extension and Tree Explosion by Steve Maughan, CCC, May 23, 2002
- Quiescence Explosion by David Rasmussen, CCC, November 26, 2002
- More Explosion by David Rasmussen, CCC, November 26, 2002
- Quiescent Explosion by macaroni, CCC, June 26, 2003
- quiesce node explosion by Mike Siler, CCC, January 24, 2004
- check extention explosion by Aivaras Juzvikas, CCC, April 03, 2004
- node explosion by David Dahlem, CCC, August 22, 2005
- Node count explosion by Mridul Muralidharan, CCC, September 03, 2005
- Quiescence Search Explosions by Mike Leany, CCC, April 18, 2008
2010 ...
- Problem with exploding tree because of extensions by Oliver Brausch, CCC, January 05, 2010 » Extensions
- Avoiding qsearch explosion by Marco Costalba, CCC, January 29, 2010 » Quiescence Search
- Quiescence node explosion by sandermvdb, OpenChess Forum, June 01, 2016 » Quiescence Search
- Q search explosion by Colin Jenkins, CCC, March 30, 2017 » Quiescence Search
2020 ...
- search explosion by Vivien Clauzon, CCC, July 02, 2020
External Links
- Exponential growth from Wikipedia
- The Great Explosion from Wikipedia
- The Jazz Explosion - Pud Wud, live at The Chance, Poughkeepsie, NY, February 05, 1989, various clips, YouTube Video
References
- ↑ Edvard Munch - One of several versions of the painting The Scream (or The Cry), National Gallery, 1893, Oslo, Norway, WebMuseum: Munch, Edvard - Among theories advanced to account for the reddish sky in the background is the artist's memory of the effects of the powerful volcanic eruption of Krakatoa, which deeply tinted sunset skies red in parts of the Western hemisphere for months during 1883 and 1884, about a decade before Munch painted The Scream. This explanation has been disputed by scholars, who note that Munch was an expressive painter and was not primarily interested in literal renderings of what he had seen.
- ↑ Remember Leonid Liberman (author of LLCHESS)? by Dann Corbit, CCC, May 23, 2015
- ↑ One mate to solve... by Leonid, CCC, May 30, 2001
