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* [http://www.talkchess.com/forum/viewtopic.php?t=55414 Wrong chess studies] by [[Lyudmil Antonov]], [[CCC]], February 21, 2015
* [http://www.talkchess.com/forum/viewtopic.php?t=63438 Penrose Puzzle] by [[Erin Dame]], [[CCC]], March 14, 2017 » [[Chess Problems, Compositions and Studies#Penrose|Penrose Puzzle]]
* [https://rjlipton.wordpress.com/2018/02/16/a-coupe-of-duchamp/ A Coup(e) of Duchamp] by [[Kenneth Wingate W. Regan|Ken Regan]], [https://rjlipton.wordpress.com/ Gödel's Lost Letter and P=NP], February 16, 2018* [http://www.talkchess.com/forum/viewtopic.php?t=66640 Marcel Duchamp endgame "splits" engines / hash phenomenon] by [[Kenneth Wingate W. Regan|Kenneth Regan]], [[CCC]], February 19, 2018 » [[Arts#Duchamp|Marcel Duchamp]], [[Transposition Table]]
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