Eveann

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a WinBoard compliant chess engine written by Andres Valverde in Delphi, first released in December 2005. EveAnn started its life when Andres translated Pham Hong Nguyen's FirstChess from C to Pascal, and made it play legal chess. He further improved the program after studying Bruce Moreland's site on chess programming topics, got several ideas from Tom Kerrigan's TSCP and Ed Schröder's //How Rebel plays chess//. The engine is dedicated to Andres' daughters Eve and Ann. EveAnn played the CCT8 in 2006, the CCT9 and under the handle //DelTomateX//, the WCRCC 2007, the First Annual ACCA World Computer Rapid Chess Championship.
 * EveAnn**,

=Program Techniques=
 * Alpha-Beta search with iterative deepening
 * Aspiration window in three phases (50, 200, infinite)
 * Quiescence search with check evasions
 * Adaptive null move pruning (Fixed to R=3 since 1.66)
 * SEE for move ordering and QS pruning
 * Transposition table in a single way (Improved in 1.67)
 * Lazy Evaluation
 * History heuristic for move ordering and pruning
 * Killer heuristic
 * LMR and LMP
 * Checks, pawns to 7th and singular extensions
 * Evaluation includes pawn structure, mobility, a few endgame patterns, king safety, center control, etc.
 * Rebel Book (Thanks to Ed and Jeroen)
 * EGGB bitbases supported. Thanks to Daniel Shawul (Scorpio) for his permission.

=Selected Games= WCRCC 2007, round 8, EveAnn (DelTomateX) - Horizon code [Event "WCRCC 2007"] [Site "Internet Chess Club"] [Date "2007.07.21"] [Round "8"] [White "EveAnn"] [Black "Horizon"] [Result "1-0"]

1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Qc7 6.Be3 a6 7.Bd3 Nf6 8.O-O Ne5 9.h3 Bc5 10.Kh1 d6 11.f4 Ng6 12.Qe1 O-O 13.f5 Ne5 14.Qh4 Bd7 15.Rf3 Nxf3 16.gxf3 Qb6 17.Rg1 Bxd4 18.e5 g6 19.Bxd4 Qc6 20.fxg6 Qxf3+ 21.Kh2 fxg6 22.Bxg6 1-0 code

=See also=
 * Dirty
 * FirstChess
 * Given Name
 * TSCP

=Forum Posts=

2005 ...

 * [|EveAnn engine released] by Andres Valverde, CCC, December 18, 2005
 * [|EveAnn 1.62 like UCI engine] by Silvian Rucsandescu, Winboard Forum, March 18, 2007
 * [|EveAnn 1.63 and Dirty 20/07/2007 released] by Andres Valverde, CCC, July 31, 2007

2010 ...

 * [|Simple question about SEE] by Andres Valverde, CCC, January 12, 2011 » Static Exchange Evaluation
 * [|EveAnn 1.64 released] by Andres Valverde, CCC, February 06, 2011
 * [|EveAnn 1.66 released] by Andres Valverde, CCC, April 27, 2011
 * [|EveAnn 1.67 released] by Andres Valverde, CCC, January 23, 2012
 * [|EveAnn 1.71 released] by Andres Valverde, CCC, February 02, 2013
 * [|EveAnn 1.71a] by Andres Valverde, CCC, February 05, 2013
 * [|EveAnn 1.72 released] by Andres Valverde, CCC, December 31, 2013

2015 ...

 * [|EveAnn 1.72 released] by Andres Valverde, CCC, April 01, 2017

=External Links= > [|readme.txt]
 * [|Andres Valverde Home Site]
 * [|Norbert's collection/EveAnn (Compilation)] by Norbert Raimund Leisner, hosted by Kirill Kryukov
 * [|EveAnn] from WBEC Ridderkerk

=References= =What links here?= include page="EveAnn" component="backlinks" limit="20"
 * Up one level**