Betsy

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Betsy,<br/ a WinBoard compatible chess engine by Landon W. Rabern, written in C with a little Assembly, released in September 2000. 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, and was therefore Arena partner engine.

=Forum Posts=
 * Betsy 5.0 is now winboard compatable by Landon W. Rabern, CCC, September 06, 2000
 * Betsy 5.26 by Landon W. Rabern, CCC,
 * 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

Misc

 * Betsy from Wikipedia
 * Betsy (disambiguation) from Wikipedia
 * Betsy (dog) from Wikipedia
 * Hurricane Betsy from Wikipedia
 * Tropical Storm Betsy (disambiguation) from Wikipedia

=References= Up one Level