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{{short description|Software to solve or assist people in creating or solving chess problems}}
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{{Use American English|date = February 2019}}
{{Use mdy dates|date = February 2019}}
This article covers [[computer software]] designed to solve, or assist people in creating or solving, [[chess problem]]s – [[puzzle]]s in which pieces are laid out as in a game of [[chess]], and may at times be based upon real games of chess that have been played and recorded, but whose aim is to challenge the [[Chess composer|problemist]] to find a solution to the posed situation, within the [[rules of chess]], rather than to play games of chess from the beginning against an opponent.
Software for chess problems can be used for creating and solving problems, including checking the soundness of a concept and position, storing it in a [[database]], printing and publishing, and saving and exporting the problem. They can solve direct mates, helpmates and selfmates and even problems with [[fairy piece]]s and other [[fairy chess]] problems. There have also been some attempts to have computers "compose" problems.▼
▲Software for chess problems can be used for creating and solving problems, including checking the soundness of a concept and position, storing it in a [[database]], printing and publishing, and saving and exporting the problem.
== Alybadix ==▼
==Software==
== Chloe and Winchloe ==▼
Chloe (DOS) and Winchloe (proprietary software) are excellent and extremely fast solving programs written by [[Christian Poisson]]. Winchloe not only supports classical problems — direct mates, helpmates and selfmates — but also many fairy pieces and conditions with different sized chessboards (up to 250 by 250 squares). It comes with a collection of more than 250,000 problems that can be updated via the Internet. Christian Poisson also maintains the Web site Problemesis.▼
First developed in 1980 by Ilkka Blom, ''Alybadix'' is a suite of chess problem-solving programs for [[DOS]] and [[Commodore 64]].<ref name=british>{{cite journal|journal=The British Chess Magazine|volume=106|publisher=Trubner & co.|year=1986}}</ref> Alybadix supports solving classical problems: selfmates, reflex mates, series mates, Circe, maximummers,<ref name=oxford>{{Cite book|title=The Oxford Companion to Chess|author=David Hooper|author2=Kenneth Whyld|publisher=Oxford University Press|year=1996}}</ref> and many Fairy types.<ref name=british/> It comes with a large problem collection and supports quality [[printing]].<ref name="ALY">[http://alybadix.wippiespace.com/ Alybadix official website] {{webarchive|url=https://archive.today/20070526215733/http://alybadix.wippiespace.com/ |date=2007-05-26 }}</ref> In 1993, Schach und Spiele magazine considered Alybadix to be six times faster than other playing machines including the RISC 2500.<ref>{{cite journal|journal=Chess Life|volume=48|publisher=United States Chess Federation|year=1993}}</ref><!--This cites one of Alybadix's sellers so may not qualify as independent sourcing-->
==
Popeye is a chess problem-solving software accommodating many fairy chess rules and able to investigate set play and tries. It can be used with several operating systems and can be connected to several existing graphical interfaces since it comes with freely available source code, cf. {{GitHub|https://github.com/thomas-maeder/popeye}}. Since its origin, Popeye was designed as a general-purpose, extensible tool for checking fairy and heterodox chess problems.<ref>{{cite web|title=A short history of Popeye|year=2012|website=Julia’sFairies|access-date=16 November 2018|first=Thomas|last=Brand|url=http://juliasfairies.com/software/popeye/history-of-popeye/}}</ref><ref>{{cite magazine|first=Thomas|last=Brand|magazine=Die Schwalbe|issue=104 |date=April 1987|pages=215–216|title=Popeye, eine eierlegende Wollmilchsau?}}</ref> The original author of Popeye was Philippe Schnoebelen who wrote it in [[Pascal (programming language)|Pascal]] under [[MS-DOS]] around 1983-84. In 1986 the code was donated in the spirit of the [[free software]] movement. Elmar Bartel, Norbert Geissler, Thomas Maeder, Torsten Linss, Stefan Hoening, Stefan Brunzen, Harald Denker, Thomas Bark and Stephen Emmerson, converted Popeye to the [[C (programming language)|C programming language]], and now maintain the program.
A good graphic interface "AP WIN" a freeware, for using with [[Windows XP]] or [[Windows 7]] has since been developed by Paul H. Wiereyn.<ref>{{cite web |url=http://alybadix.viuhka.fi/apwin/apwin.htm |title=Apwin |accessdate=2012-08-08 |url-status=dead |archiveurl=https://web.archive.org/web/20120725065341/http://alybadix.viuhka.fi/apwin/apwin.htm |archivedate=2012-07-25 }}</ref> Using this one can create diagrams and use Popeye for solving problems directly from the diagram.
▲Chloe (DOS) and Winchloe (proprietary software) are
===Problemist(e)===
▲== Natch and iNatch ==
[http://www.Problemist.com Problemist] is a shareware program written by
▲Freeware programs written by [[Pascal Wassong]] for DOS/Linux. Natch solves [[retrograde analysis]] problems by constructing a "[[proof game]]" - the shortest possible game leading to a certain position. Natch is a command line utility, but there is a [[Java (programming language)|Java]]-based graphical interface. iNatch which also provide playing moves with fairy conditions: [[monochrome chess]], [[Einstein chess]], vertical cylinder.
===Jacobi===
Jacobi is a program to solve fairy chess proof game problems by François Labelle. It is written in JavaScript and run from browser [http://wismuth.com/jacobi/]. In 2003, Labelle already developed chess-related programs and published computer-generated chess problems [http://wismuth.com/chess/chess.html].
==
Chest was created by Heiner Marxen in 1999. It is written in C, and distributed as source code
▲Problemist is shareware by [[Matthieu Leschamelle]] for Windows and Windows Mobile. Problemist solves direct mates, helpmates, selfmates and [[reflexmate]]s. It can rotate positions, print diagrams and much more. With Problemist come two TrueType chess fonts, and from its web page you can download more than 100,000 problems. Problemist is the first chess problems exchange format.
.<ref>[http://turbotm.de/~heiner/Chess/chest.html/ Chest home page]</ref> It solves direct mates, self mates, and help
mates (as well as stalemates for self- and help mates). A UCI adapter (written by Franz Huber) is also available,
allowing Chest to be used as solving engine in any UCI-capable chess GUI.
===Stelvio===
[https://www.thbrand.de/stelvio-seite/ Stelvio] is a freeware program written by [[Reto Aschwanden]] devoted to solving orthodox shortest proof games. It is written in Java and can therefore run on various platforms.
==
===Chess Problem Database Server===▼
[https://pdb.dieschwalbe.de/ Chess Problem Database Server] is online [[database]] of all types of [[chess problem]]s, maintained by [[Gerd Wilts]], hosted by [[Die Schwalbe]]. Database incorporated [[John Niemann]] collection and the work of a lot of contributors. Database has 428,703 problems (as of November 2019). Problems are represented graphically with solutions and commentary.
==Other==
===LaTeX Diagram Style===
Diagram is a style file for [[LaTeX]] for typesetting chess diagrams.{{citation needed|date=July 2017}} The style was originally created by Thomas Brand and further developed by Stefan Hoening, both based on ideas of a [[TeX]] package from Elmar Bartel. The style is used to produce the German problem chess magazine [[Die Schwalbe]].
==See also==
▲== Problem Database ==
* [[Chess aesthetics]]
* [[List of chess software]]
==References==
{{reflist|30em}}
== External links ==
* [
{{DEFAULTSORT:Software For Handling Chess Problems}}
[[Category:Chess problems]]
[[Category:Chess software]]
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