#3139: Chess Variant

XKCD comic, described below.
Transcript
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[A chessboard is shown with the white pieces at the bottom of the screen. The pieces are illustrated in the basic design of standard computer chess. The chessboard is divided into 16 2x2 sliding squares with the e3-f4 sliding square currently being moved to the g3-h4 spot. Otherwise the opening is a standard Scotch Opening, with the pieces in the e3-f4 spot like how they are supposed to be]

[Text below the panel]

Sliding number puzzle chess


(Sourced from explainxkcd.com)

Title text:The draw-by-repetition rule does a good job of keeping players from sliding a tile back and forth repeatedly, but the tiles definitely introduce some weird en passant and castling edge cases.


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