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Retrograde analysis is the method of deducing information by working backwards from a given position or outcome. This information can be about past positions of the same game, or may contain forward content, such as optimal play.

5
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Pawn still being d2 allows us to complete the answer: c7-c5 must have been Black's move. Please see the added discussions below. Some initial thoughts: To get started, by a trivial process of elimin …
answered Feb 20 '18 by user929304
6
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1answer
I was recently given a retrograde type of puzzle to solve, even though I've managed to at least intuitively get close to an answer, I don't know how to put it in the form of an acceptable proof. For e …
asked Jan 5 '18 by user929304