#xkcd No. 3177
Date: 2025-12-5
Title: Chessboard Alignment
Alt text: Luckily, the range is limited by the fact that the square boundary lines follow great circles.
https://xkcd.com/3177/
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![Description:
Three chessboards are set up side-by-side, each with two players. A bishop from the middle board is shown moving onto the right-hand board.
Transcript:
[The panel shows three separate chess games being played side-by-side. A glowing, pixelated path shows a bishop moving from a square on the middle board to a square on the board to the right.]
Caption: IT DOESN'T HAPPEN OFTEN BECAUSE IT REQUIRES MICROMETER PRECISION, BUT IF TWO CHESS BOARDS ARE PERFECTLY ALIGNED, IT'S ACTUALLY LEGAL TO MOVE PIECES BETWEEN THEM.](https://me.ns.ci/system/media_attachments/files/115/672/273/572/401/333/original/2e2432eedec7cac2.png)