Dabbaba

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Dabbaba, a chess playing program by Jens Bæk Nielsen, written from May 1995 to November 1998 in C|Turbo C to run on PC's under DOS in graphics mode , also able to play chess variants like Knightmate Chess , Shatranj and many others. During its iterative search , maintaining a ply stack of irreversible aspects of the position, that is castling rights, en passant target, halfmove clock, and hash-keys, it updates its mailbox board and piece-lists incrementally during make and unmake move. A feature of Dabbaba is that it starts its search by using up to 20% of the allotted time for a move using a mate search at depth zero, following long sequences of checks to see if it results in a mate, material gain or perhaps a saving draw. To avoid a search explosion, Dabbaba considers ply-distance to the root and number of replies so that shallow lines are searched deeper than wide lines. In May 2008, Jim Ablett released a WinBoard version of Dabbaba , and in August 2012, Jens Bæk Nielsen as well.

=Etymology= The Dabbaba (or dabaaba, dabbabah) is a Fairy chess piece that jumps two squares orthogonally, leaping over intermediate pieces like a knight, also called (2,0)-leaper. The Arabic word dabbāba formerly meant a type of medieval siege engine, and nowadays an army tank.

=Screenshot= Dabbaba Screen

=Forum Posts=
 * Dabbaba needs an openingbook by Jens Bæk Nielsen, CCC, May 27, 1998 » Opening Book
 * Dabbaba 0.98 with Winboard support available by Jim Ablett, CCC, May 08, 2008
 * Re: agChess -- an agressive chess variant by H.G.Muller, CCC, July 26, 2008
 * Dabbaba 6.50 has been released by Graham Banks, CCC, August 15, 2012
 * Dabbaba And The Cupcake by Graham Banks, CCC, August 16, 2012
 * True iterative search... by Jens Bæk Nielsen, CCC, November 27, 2012 » Iterative Search
 * Having fun with the evaluation function by Jens Bæk Nielsen, CCC, December 31, 2012 » Evaluation
 * Human killer engine - a cafè-monster by Jens Bæk Nielsen, CCC, February 09, 2013

=External Links=

Chess Engine

 * Chess / Skak by Jens Bæk Nielsen
 * Dabbaba by Jens Bæk Nielsen
 * DABBABA.C


 * The Chess Variant Pages - Dabbaba
 * Dabbaba at CCRl 40/4

Dabbaba

 * Dabbaba (chess) from Wikipedia
 * Fairy chess piece from Wikipedia
 * Dabbāba (disambiguation) from Wikipedia

=References= Up one Level