a chess engine by Tom Hyer derived from Gull 3, released in 2017 . The change log of the version participating at TCEC Season 19 mentions move sorting and tuning of a double attack evaluation feature .
- Plate from The Arabian Nights, 'The Roc which fed its young on elephants', The Second Voyage of Sinbad the Sailor (Hodder & Stoughton), author: Charles Maurice Detmold (1883 - 1908), Roc (mythology) from Wikipedia, Wikimedia Commons
- New engine "Roc" by Tom Hyer, CCC, January 18, 2017
- Tuning, double-attack, move sorting · TomHyer/Roc@28942eb · GitHub