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a [[Chess Engine Communication Protocol]] compliant chess engine by [[Matthew R. Brades]], written in [[C]], previously available as [[:Category:Open Source|open source chess engine]] by [[Matthew R. Brades]], licensed under the [[Free Software Foundation#GPL|GNU General Public License]] <ref>[http://www.talkchess.com/forum3/viewtopic.php?f=7&t=75904 Chess programs :: Source available, but not today?] by [[Günther Simon]], written in [[CCCC]], November 23, 2020</ref>. Dorpsgek versions are were named after [https://en.wikipedia.org/wiki/Cocktail Cocktails] in alphabetic order, starting with Ambrosia released in July 2016 <ref>[http://www.talkchess.com/forum/viewtopic.php?t=60733 Dorpsgek Ambrosia] by [[Matthew R. Brades]], [[CCC]], July 07, 2016</ref> .