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Ethereal night sky [1]

an UCI compliant open source chess engine written by Andrew Grant in C, licensed under the GNU GPL and first officially released in June 2016 [2]. Ethereal is greatly influenced from Crafty, Stockfish, TSCP, MadChess, and Fruit [3].



Board Representation




See also

Forum Posts


Re: How to speed up my engine by Andrew Grant, CCC, May 03, 2016




External Links

Chess Engine



  1. A total eclipse of the Moon is an impressive spectacle. But it also provides another viewing opportunity: a dark, moonlight-free starry sky. At Cerro Paranal in the Chilean Atacama Desert, one of the most remote places in the world, the distance from sources of light pollution makes the night sky all the more remarkable during a total lunar eclipse. This panoramic photo, taken by ESO Photo Ambassador Yuri Beletsky, shows the view of the starry sky from the site of ESO’s Very Large Telescope (VLT) at Cerro Paranal during the total lunar eclipse of December 21, 2010. The reddish disc of the Moon is seen on the right of the image, while the Milky Way arches across the heavens in all its beauty. Another faint glow of light is also visible, surrounding the brilliant planet Venus in the bottom left corner of the picture. This phenomenon, known as zodiacal light, is produced by sunlight reflecting off dust in the plane of the planets. It is so faint that it’s normally obscured by moonlight or light pollution. Image by ESO, Yuri Beletsky, CC BY 4.0, Wikimedia Commons, Beauty from Wikipedia
  2. Ethereal - Official Release by Andrew Grant, CCRL Discussion Board, June 25, 2016
  3. Ethereal/ at master · AndyGrant/Ethereal · GitHub
  4. Features based on GitHub - AndyGrant/Ethereal: Ethereal UCI Chess Engine
  5. Ethereal's 8.60 Lazy SMP inspired by Demolito by Lucas Braesch, see Release of Ethereal 8.60 SMP by Andrew Grant, CCC, December 10, 2017

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