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Bruce " Ravens " Moreland (born January 22, 1959) is an American rock musician and songwriter. He has worked with such bands as Wall of Voodoo (with his brother Marc Moreland), The Weirdos, Nervous Gender, and Concrete Blonde among others. As of 2011, his current project is known as Ravens Moreland.
Bruce Moreland, an American computer scientist, former Microsoft employee and computer chess programmer, author of Ferret, one of the strongest chess engines at its time [2] . Bruce published the open source chess program Gerbil for educational purpose, and maintained a great computer chess programming site.
- The Idea
- History
- PVS and NegaScout
- Pseudo Code
- PVS + ZWS
- PVS and Aspiration
- See Also
- Publications
- Forum Posts
- External Links
In most of the nodes we need just a bound, proving that a move is unacceptable for us or for the opponent, and not the exact score. This is needed only in so-called principal variation - a sequence of moves acceptable for both players (i.e. not causing a beta-cutoff anywhere in the path) which is expected to propagate down to the root. If a lower-d...
PVS was introduced by Tony Marsland and Murray Campbell in 1982 as nomination of Finkel's and Fishburn's routine Palphabeta , in Fishburn's 1981 thesis called Calphabeta, which in turn is similar to Judea Pearl's Scout : Despite the publications, PVS was already used in 1978, as mentioned by Robert Hyatt : John Philip Fishburnin a note, September 2...
Most PVS implementations are similar to Reinefeld's NegaScout , and are used by most todays chess programs. It is based on the accuracy of the move ordering. Typically, modern chess programs find fail-highson the first move around 90% of the time. This observation can be used to narrow the window on searches of moves after the first, because there ...
This demonstrates PVS in a fail-hardframework, where alpha and beta are hard bounds of the returned score.
Often, programmers template PVS to a pure PV-node search and a separate scout search with null windows.
When implementing PVS together with the aspiration window, one must be aware that in this case also a normal window search might fail, leaving the program with no move and no PV. (Actually this is the reason why I wrote "When we already have a PV move" and not "searching later moves"). 1. PVS and Aspiration A state of the art fail-soft PVS implemen...
1980 ...
1. Judea Pearl (1980). Asymptotic Properties of Minimax Trees and Game-Searching Procedures. Artificial Intelligence, Vol. 14, No. 2 2. Judea Pearl (1980). Scout: A Simple Game-Searching Algorithm with Proven Optimal Properties. Proceedings of the First Annual National Conference on Artificial Intelligence. Stanford. pdf 3. Raphael Finkel, John Philip Fishburn (1980). Parallel Alpha-Beta Search on Arachne. IEEEInternational Conference on Parallel Processing 4. John Philip Fishburn (1980). An...
1985 ...
1. Agata Muszycka-Jones, Rajjan Shinghal (1985). An empirical comparison of pruning strategies in game trees. IEEE Transactions on Systems, Man, and Cybernetics, Vol. 15, No. 3 2. Tony Marsland (1986). A Review of Game-Tree Pruning. ICCA Journal, Vol. 9, No. 1, pdf 3. Alexander Reinefeld, Tony Marsland (1987). A Quantitative Analysis of Minimal Window Search. IJCAI-87, pdf
2000 ...
1. Mark Winands, Jaap van den Herik, Jos Uiterwijk, Erik van der Werf (2003). Enhanced forward pruning. JCIS 2003 2. Mark Winands, Jaap van den Herik, Jos Uiterwijk, Erik van der Werf (2005). Enhanced Forward Pruning. Information Sciences, Vol. 175, No. 4, pdf preprint(with PVS modifications)
1995 ...
1. Trick Marsland by Robert Hyatt, rgcc, February 15, 1996 2. Re: Zero-width Window Null Move Search by Guido Schimmels, CCC, June 18, 1998 » NegaScout 3. Fail-soft with PVS? by Will Singleton, CCC, March 09, 1999 » Fail-Soft 4. Re: negascout vs pvs by Dave Gomboc, CCC, June 04, 1999
2000 ...
1. PVS and NegaScout by Gian-Carlo Pascutto, CCC, January 05, 2000 2. A Question on simple Alpha-Beta versus PVS/Negascout by Andrei Fortuna, CCC, March 21, 2000 » Alpha-Beta, NegaScout 3. What is Negascout and why is MWS PVS? by Severi Salminen, CCC, November 24, 2000 4. Please explain the difference between PVS and NegaScout by Severi Salminen, CCC, March 02, 2001 5. QSearch() as PVS() ? by Matthias Gemuh, CCC, January 14, 2004 6. Fruit - Question for Fabien by Dan Honeycutt, CCC, March 11,...
2005 ...
1. Slight enhancement to PVS by Pradu Kannan, Winboard Programming Forum, June 10, 2007 2. Search questions by Sven Schüle, Winboard Forum, July 17, 2007 » Fail-Soft 3. Tuning PVS by Aleks Peshkov, CCC, September 27, 2007 4. when to try zero window search, CCC, November 14, 2008 5. PVS by Edmund Moshammer, CCC, March 12, 2009 6. Re: PVS by Robert Hyatt, CCC, March 12, 2009 7. Re: PVS by Vincent Diepeveen, CCC, March 14, 2009 8. No PVS at low depths? by Mark Lefler, CCC, June 05, 2009 9. A way...
Principal Variation Search from Bruce Moreland's Programming TopicsLecture notes for February 2, 1999 Variants of Alpha-Beta Search by David EppsteinFerret , a chess engine by Bruce Moreland. Ferret won the Amateur World Microcomputer Chess Champion Title in Paderborn 1995 and was two times winner of the World Microcomputer Speed-Chess Champion, in Jakarta 1996 and Paris 1997. Ferret became runner up at the 14th World Microcomputer Chess Championship, Jakarta 1996 without losing a game.
16 mar 2018 · I Wall of Voodoo nascono nel 1977 dall’incontro tra il cantante e virtuoso dell’armonica Stanard Ridgway e il chitarrista Marc Moreland, cui si uniscono il fratello Bruce Moreland, il tastierista Chas Gray e il batterista Joe Nanini, in una sezione ritmica comunque fortemente condizionata dalla batteria elettronica.
Bruce Moreland teaching me computer chess basics and more; also co-inventing the name Gullydeckel. Bob Hyatt for tirelessly educating computer chess enthusiasts. The crowd at the rec.games.chess.computer group.
In 1977, with the addition of Skulls members Bruce Moreland (Marc Moreland's brother) as bassist and Chas T. Gray as keyboardist, along with Joe Nanini (who had been the drummer for Black Randy and the Metrosquad) the first lineup of Wall of Voodoo was born.
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