Difference between revisions of "Betsy"
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'''[[Main Page|Home]] * [[Engines]] * Betsy''' | '''[[Main Page|Home]] * [[Engines]] * Betsy''' | ||
| − | [[FILE:Hurricane Betsy.jpg|border|right|thumb| Hurricane Betsy <ref>[https://en.wikipedia.org/wiki/Hurricane_Betsy Hurricane Betsy] in the [https://en.wikipedia.org/wiki/Gulf_of_Mexico Gulf of Mexico] in September of 1965 as taken by the [https://en.wikipedia.org/wiki/Television_Infrared_Observation_Satellite TIROS-8] weather satellite. Source: [https://en.wikipedia.org/wiki/National_Oceanic_and_Atmospheric_Administration NOAA] [http://www.photolib.noaa.gov/ Photo Library], September 4, 1965</ref> ]] | + | [[FILE:Hurricane Betsy.jpg|border|right|thumb|240px| Hurricane Betsy <ref>[https://en.wikipedia.org/wiki/Hurricane_Betsy Hurricane Betsy] in the [https://en.wikipedia.org/wiki/Gulf_of_Mexico Gulf of Mexico] in September of 1965 as taken by the [https://en.wikipedia.org/wiki/Television_Infrared_Observation_Satellite TIROS-8] weather satellite. Source: [https://en.wikipedia.org/wiki/National_Oceanic_and_Atmospheric_Administration NOAA] [http://www.photolib.noaa.gov/ Photo Library], September 4, 1965</ref> ]] |
'''Betsy''',<br/> | '''Betsy''',<br/> | ||
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Originally written in [[Pascal]] with its own [[CLI|text interface]] it was rewritten in C using [[Rotated Bitboards|rotated bitboards]]. Betsy applies [[Principal Variation Search|PVS]] with [[Null Move Pruning|null move pruning]], and various standard and some aggressive non-standard [[Extensions|extensions]] and [[Reductions|reductions]]. | Originally written in [[Pascal]] with its own [[CLI|text interface]] it was rewritten in C using [[Rotated Bitboards|rotated bitboards]]. Betsy applies [[Principal Variation Search|PVS]] with [[Null Move Pruning|null move pruning]], and various standard and some aggressive non-standard [[Extensions|extensions]] and [[Reductions|reductions]]. | ||
According to a former [[Arena]] site, Betsy was the first published chess engine able to play [[Chess960]] <ref>[https://chess-tigers.de/index_news.php?id=308&rubrik=4&PHPSESSID=d71dfe17e7e8aae16adce6f8fb284410 Der Chess960-Express ist nicht mehr aufzuhalten], [https://chess-tigers.de/cttc_main.php?rubrik=7 Chess Tigers Training Center], July 20, 2005 (German)</ref>, and was therefore Arena partner engine. | According to a former [[Arena]] site, Betsy was the first published chess engine able to play [[Chess960]] <ref>[https://chess-tigers.de/index_news.php?id=308&rubrik=4&PHPSESSID=d71dfe17e7e8aae16adce6f8fb284410 Der Chess960-Express ist nicht mehr aufzuhalten], [https://chess-tigers.de/cttc_main.php?rubrik=7 Chess Tigers Training Center], July 20, 2005 (German)</ref>, and was therefore Arena partner engine. | ||
| + | |||
| + | =C#= | ||
| + | As of 2014, Landon Rabern started to port Betsy to [[C sharp|C#]], available as [[:Category:Open Source|open source engine]] under the [[Massachusetts Institute of Technology#License|MIT License]] at [https://en.wikipedia.org/wiki/GitHub GitHub]. | ||
| + | All the major components of a chess engine are there, just not a tuned [[Evaluation|evaluation]] <ref>[https://github.com/landon/Chess GitHub - landon/Chess: Beginnings of a port of Betsy to C#]</ref>. | ||
| + | The board class embeds an [[8x8 Board|8x8 board]] and the [[Bitboard Board-Definition|Bitboard board-definition]], and implements [[Rotated Bitboards|rotated bitboards]]. | ||
| + | The [[Search|search]] is implemented using a derivation chain of classes, the abstract base ''Brain'', ''TranspositionTableBrain'' ([[Transposition Table]], [[Iterative Deepening]]), and the concrete ''BasicAlphaBetaBrain'' ([[Alpha-Beta]]), ''NullMoveBrain'' ([[Null Move Pruning]]) and ''MTDfBrain'' ([[MTD(f)]]) classes. | ||
=Forum Posts= | =Forum Posts= | ||
| + | * [https://www.stmintz.com/ccc/index.php?id=125117 Re: C or C++ for Chess Programming?] by [[Landon Rabern]], [[CCC]], August 18, 2000 | ||
* [https://www.stmintz.com/ccc/index.php?id=128512 Betsy 5.0 is now winboard compatable] by [[Landon Rabern]], [[CCC]], September 06, 2000 | * [https://www.stmintz.com/ccc/index.php?id=128512 Betsy 5.0 is now winboard compatable] by [[Landon Rabern]], [[CCC]], September 06, 2000 | ||
* [https://www.stmintz.com/ccc/index.php?id=178491 Betsy 5.26] by [[Landon Rabern]], [[CCC]], July 06, 2001 | * [https://www.stmintz.com/ccc/index.php?id=178491 Betsy 5.26] by [[Landon Rabern]], [[CCC]], July 06, 2001 | ||
| + | * [https://www.stmintz.com/ccc/index.php?id=302797 Re: FRC_TheBaron_101 Vs Fritz8 (Castling vs Not Castling rules)] by [[Landon Rabern]], [[CCC]], June 24, 2003 | ||
* [https://www.stmintz.com/ccc/index.php?id=315727 Betsy in Arena] by Mark Loftus, [[CCC]], September 13, 2003 | * [https://www.stmintz.com/ccc/index.php?id=315727 Betsy in Arena] by Mark Loftus, [[CCC]], September 13, 2003 | ||
* [http://www.talkchess.com/forum/viewtopic.php?t=23156 Betsy 6.5.1 by Landon Rabern] by [[Norbert Raimund Leisner]], [[CCC]], August 21, 2008 | * [http://www.talkchess.com/forum/viewtopic.php?t=23156 Betsy 6.5.1 by Landon Rabern] by [[Norbert Raimund Leisner]], [[CCC]], August 21, 2008 | ||
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* [http://www.computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?print=Details&eng=Betsy%206.51%20Nobook Betsy 6.51 Nobook] in [[CCRL|CCRL 40/2]] | * [http://www.computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?print=Details&eng=Betsy%206.51%20Nobook Betsy 6.51 Nobook] in [[CCRL|CCRL 40/2]] | ||
* [http://www.computerchess.org.uk/ccrl/404FRC/cgi/engine_details.cgi?print=Details&eng=Betsy%20Fischer#Betsy_Fischer Betsy Fischer] in [[CCRL|CCRL 40/4 FRC]] | * [http://www.computerchess.org.uk/ccrl/404FRC/cgi/engine_details.cgi?print=Details&eng=Betsy%20Fischer#Betsy_Fischer Betsy Fischer] in [[CCRL|CCRL 40/4 FRC]] | ||
| + | * [https://github.com/landon/Chess GitHub - landon/Chess: Beginnings of a port of Betsy to C#] | ||
==Misc== | ==Misc== | ||
* [https://en.wikipedia.org/wiki/Betsy Betsy from Wikipedia] | * [https://en.wikipedia.org/wiki/Betsy Betsy from Wikipedia] | ||
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<references /> | <references /> | ||
'''[[Engines|Up one Level]]''' | '''[[Engines|Up one Level]]''' | ||
| + | [[Category:Open Source]] | ||
| + | [[Category:C sharp]] | ||
[[Category:WinBoard]] | [[Category:WinBoard]] | ||
[[Category:Chess960]] | [[Category:Chess960]] | ||
Revision as of 20:22, 5 January 2020
Hurricane Betsy [1]
Betsy,
a WinBoard compatible chess engine by Landon Rabern, written in C with a little Assembly, released in September 2000 [2].
Originally written in Pascal with its own text interface it was rewritten in C using rotated bitboards. Betsy applies PVS with null move pruning, and various standard and some aggressive non-standard extensions and reductions.
According to a former Arena site, Betsy was the first published chess engine able to play Chess960 [3], and was therefore Arena partner engine.
C#
As of 2014, Landon Rabern started to port Betsy to C#, available as open source engine under the MIT License at GitHub. All the major components of a chess engine are there, just not a tuned evaluation [4]. The board class embeds an 8x8 board and the Bitboard board-definition, and implements rotated bitboards. The search is implemented using a derivation chain of classes, the abstract base Brain, TranspositionTableBrain (Transposition Table, Iterative Deepening), and the concrete BasicAlphaBetaBrain (Alpha-Beta), NullMoveBrain (Null Move Pruning) and MTDfBrain (MTD(f)) classes.
Forum Posts
- Re: C or C++ for Chess Programming? by Landon Rabern, CCC, August 18, 2000
- Betsy 5.0 is now winboard compatable by Landon Rabern, CCC, September 06, 2000
- Betsy 5.26 by Landon Rabern, CCC, July 06, 2001
- Re: FRC_TheBaron_101 Vs Fritz8 (Castling vs Not Castling rules) by Landon Rabern, CCC, June 24, 2003
- Betsy in Arena by Mark Loftus, CCC, September 13, 2003
- Betsy 6.5.1 by Landon Rabern by Norbert Raimund Leisner, CCC, August 21, 2008
External Links
Chess Engine
- Index of /chess/engines/Norbert's Collection/Betsy by Norbert Raimund Leisner, hosted by Kirill Kryukov
- Betsy from WBEC Ridderkerk (Internet Archive)
- Betsy 6.51 Nobook in CCRL 40/2
- Betsy Fischer in CCRL 40/4 FRC
- GitHub - landon/Chess: Beginnings of a port of Betsy to C#
Misc
- Betsy from Wikipedia
- Betsy (disambiguation) from Wikipedia
- Betsy (dog) from Wikipedia
- Hurricane Betsy from Wikipedia
- Tropical Storm Betsy (disambiguation) from Wikipedia
References
- ↑ Hurricane Betsy in the Gulf of Mexico in September of 1965 as taken by the TIROS-8 weather satellite. Source: NOAA Photo Library, September 4, 1965
- ↑ Betsy from WBEC Ridderkerk (Internet Archive)
- ↑ Der Chess960-Express ist nicht mehr aufzuhalten, Chess Tigers Training Center, July 20, 2005 (German)
- ↑ GitHub - landon/Chess: Beginnings of a port of Betsy to C#
