CuckooChess

{{Short description|Chess engine software}}

{{Infobox software

| title = CuckooChess

| name = CuckooChess

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| developer = Peter Österlund

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| latest release version = 1.12

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| programming language = Java

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| genre = Chess engine

| license = GNU GPLv3

| website = {{URL|http://hem.bredband.net/petero2b/javachess/index.html}}

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{{Chess programming series}}

CuckooChess is an advanced free and open-source chess engine under the GNU General Public License written in Java by Peter Österlund. CuckooChess provides an own GUI, and optionally supports the Universal Chess Interface protocol for the use with external GUIs such as Arena. An Android port is available, where its GUI is also based on Peter Österlund's Stockfish port dubbed DroidFish.{{cite web |title=CuckooChess |url=https://chessprogramming.wikispaces.com/CuckooChess |website=Chess Programming Wiki |accessdate=15 July 2018}}

The program uses the Chess Cases chess font, created by Matthieu Leschemelle. The name CuckooChess comes due that the transposition table is based on Cuckoo hashing.{{cite web |title=CuckooChess |url=http://hem.bredband.net/petero2b/javachess/index.html |website=Bredband |accessdate=15 July 2018}}

Android app based chess gaming app Droidfish employs both CuckooChess and Stockfish chess engines.{{cite web |last1=Allen Holm |first1=Joshua |title=7 open source Android apps for chess players |url=https://opensource.com/life/16/6/open-source-android-apps-chess |publisher=OpenSource.com |date=22 Jun 2016}} Similarly, Kickstarter funded AI based virtual reality chess game Square Off also uses CuckooChess engine.{{cite news |last1=Dormehl |first1=Luke |title=The pieces move by themselves in this crazy high-tech chess board |url=https://www.digitaltrends.com/cool-tech/square-off-chess-board/ |work=Digital Trends |date=28 Oct 2016}}

It has an ELO rating of 2583 (as of July 2018) and a rank of 135‑137 in the Computer Chess Rating List.{{cite web |title=CCRL 40/4 Downloads and Statistics |url=https://www.computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=CuckooChess%201.12%2064-bit |website=Computerchess.org.uk |accessdate=15 July 2018 |archive-url=https://web.archive.org/web/20180715210826/https://www.computerchess.org.uk/ccrl/404/cgi/engine_details.cgi?print=Details&each_game=1&eng=CuckooChess%201.12%2064-bit |archive-date=15 July 2018 |url-status=dead }}