Gustav

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a program for solving orthodox chess problems by Olaf Jenkner, written in Delphi, program texts and manual available in German only. Initially developed since 1990 for the MS-DOS operating system in Pascal, Gustav was later ported and improved to run under Windows. Gustav is able to solve checkmate, stalemate, [|helpmate], helpstalemate, [|selfmate] and selfstalemate in N moves. It has a dedicated GUI with various dialogs to edit positions, to load and save FEN or proprietary GST-files of problem collections, and to control the search. Beside brute-force search accelerated by a transposition table, several automatic or user defined constraints such as number of escape squares for the checked king, allow shallow and deep searches of up to 170 moves (339 plies). The longest for Gustav solvable problem so far has 163 moves, a composition by [|Ottó Titusz Bláthy] :
 * Gustav**,


 * [[image:http://webchess.freehostia.com/diag/chessdiag.php?fen=K7/p3p1p1/1p2p1p1/rp4B1/brpn4/Rnk5/8/4N1N1%20w%20-%20-&size=large&coord=yes&cap=no&stm=yes&fb=no&theme=classic&color1=E3CEAA&color2=635147&color3=000000]] ||

=See also=
 * Alybadix
 * Checkmate
 * Chess Problems, Compositions and Studies
 * Chess Problem Solving Engines
 * Chest
 * Given Name
 * Mate Search
 * Popeye
 * Proof-Number Search
 * Stalemate

=Forum Posts=
 * [|Can Alybadix or Gustav solve this studies] by Uri Blass, CCC, December 10, 1998
 * [|Gustav new version ?] by Michael Diosi, CCC, December 11, 1999
 * [|Delphi/Kylix Compiler] by Olaf Jenkner, CCC, March 14, 2001
 * [|Gustav] by Olaf Jenkner, CCC, December 08, 2003
 * [|Searching for Gustav mate solver] by David Dahlem, CCC, August 02, 2011

=External Links=

Chess Program

 * [|GUSTAV - fastest program for orthodox selfmates and moremovers] review by Václav Kotěšovec, October 6, 2009
 * [|Gustav 3.x] from Schachversand Niggemann (German)

Misc

 * [|Gustav (name) from Wikipedia]

=References= =What links here?= include page="Gustav" component="backlinks" limit="40"
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