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Reblogged by technomancy@icosahedron.website ("tech? no! man, see..."):
Siphonay@octodon.social wrote:
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- l just read in a book by Raymond Smullyan, a logician. I forgot the name of the book but it is a series of "forensic chess puzzles" solved by Sherlock Holmes. Anyway, according to Smullyan, the last official change in rules occurred in the 1800s. The previous rule stated that a promoted pawn could become any piece except the king or a pawn. The rule had to be amended, stating that a promoted pawn could become any piece of the same color, except the king or a pawn. The rule change was precipitated by a famous game that ended similar to this: (remote)
- White has an obvious advantage here but shouldn't be able to mate in one. Whatever white promotes to on b8, black's king can capture it. Except...white played b8, promoting to a black knight! Not illegal, according to the rule book at the time (remote)
