BugChess NL

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BugChess, (QueenMaxima) a Chess Engine Communication Protocol compatible chess engine by Erik van het Hof and Hermen Reitsma developed in the period from 1996 to 2000, initially with focus on Losing Chess, written in C++. BugChess played the 18th Dutch Open Computer Chess Championship 1998 running on a Pentium II at 450MHz , and was active in the late 90s at ICC, as reported in Will Singleton's ICC Green Lists. The program continued to play as QueenMaxima(C) at ICC and was published as open source engine under the GPL license. UCI compliance was created in 2013.

=Features=

Board Representation

 * 8x8 Board
 * Piece-Lists

Search

 * Fractional Ply Iterative Deepening
 * Aspiration Windows
 * Principal Variation Search
 * Transposition Table
 * Selectivity
 * Extensions
 * Check Extensions
 * Mate Threat Extensions
 * One Reply Extensions
 * Passed Pawn Extensions
 * Recapture Extensions
 * Null Move Pruning
 * Quiescence Search
 * Move Ordering
 * Hash Move
 * Internal Iterative Deepening
 * MVV/LVA
 * Static Exchange Evaluation

Evaluation

 * Piece-Square Tables
 * Bishop Pair
 * Mobility
 * Trapped Bishops
 * King Safety
 * Pawn Structure
 * Isolated Pawns
 * Passed Pawns
 * Connected Passed Pawns

Misc

 * Book Learning
 * Pondering
 * Losing Chess

=Selected Games= DOCCC 1998, round 10, BugChess - CilkChess [Event "Dutch Open Computer 1998"] [Site "Leiden NED"] [Date "1998.11.29"] [Round "10"] [White "BugChess"] [Black "CilkChess"] [Result "0-1"]

1.e4 e5 2.Nf3 Nf6 3.d4 exd4 4.Bd3 Bb4+ 5.Bd2 Bc5 6.e5 Nd5 7.Bg5 Ne7 8.Nbd2 h6 9.Bf4 Nbc6 10.Nb3 d6 11.Nxc5 dxc5 12.O-O O-O 13.Qe2 Bf5 14.Bxf5 Nxf5 15.Qb5 Qd5 16.Bd2 Nxe5 17.Nxe5 Qxe5 18.Qxb7 Rab8 19.Qxa7 Rxb2 20.Qa4 Qe4 21.Rac1 Nh4 22.f3 Ra8 23.Qc4 Qc6 24.a4 Rxa4 25.Qe2 c4 26.Qe7 Nf5 27.Qe5 Rb5 28.Qe4 Qxe4 29.fxe4 Nd6 30.Bf4 Nxe4 31.Bxc7 Ra2 32.Rf4 Nc3 33.Rf2 f6 34.g4 Rbb2 35.Bf4 d3 36.Kh1 Ne2 37.Rd1 Nxf4 0-1

=Namesake=
 * BugChess2 by François Karr and Jean-Philippe Karr

=See also=
 * Maxima2

=Forum Posts=
 * ICC Green List - Jan 10 by Will Singleton, CCC, January 10, 2000

=External Links=

Chess Engine

 * GitHub - hof/queenmaxima: QueenMaxima chess program

Misc

 * Bug from Wikipedia
 * Software bug from Wikipedia
 * Hemiptera (true bug) from Wikipedia
 * Queen from Wikipedia
 * Maxima from Wikipedia
 * Queen Máxima of the Netherlands from Wikipedia

=References= Up one Level