What is the origin of the term “cooked” for a chess problem with an additional, unintended solution?
- Eugene B. Cook - Problem solver who could detect flaws in many compositions
- "The term (cook) was first used in connection with chess by Kling and Horwitz in their magazine The Chess Player, 1851, p.40. Mr. Alexander's [Alexandre's] collection of two thousand problems contains many faulty positions, and we shall now and then cook some of them, which may amuse...many of our readers." The Oxford Companion to Chess by David Hooper and Kenneth Whyld
You can also find an overview of his other notes on various subjects at https://www.chesshistory.com/winter/extra/factfinder.html .
I can add that Cook is reported to have used the word in the same (or at least a very close) meaning of 'analyzing a problem/study closely and discovering an unknown fault' in his comment on a 20-mover ("The Columbus Egg" by Lichtenstein) published in New York Clipper on 7/17/1858. Cook's solution (in 10 moves) was accompanied by the line “the ‘Egg’ was rotten and wouldn’t stand Cooking.” (see the notes to the solution of problem 117, the solution that was "by E. B. C. only.")
Added: Kling's use of the term seems to have been related to improving a faulty problem. See http://www.anders.thulin.name/posts/cookery/ for a fairly late reference.