Queer Chess

Unreviewed import — a classic from the public domain; its solution has not been machine-checked yet.

math

Can you place two White rooks and a White knight on the board so that the Black king (who must be on one of the four squares in the middle of the board) shall be in check with no possible move open to him? "In other words," the reader will say, "the king is to be shown checkmated." Well, you can use the term if you wish, though I intentionally do not employ it myself. The mere fact that there is no White king on the board would be a sufficient reason for my not doing so.

Solution

Commit an attempt to unseal the proof. Write your answer — right or wrong, thinking it through is the point.

Solution

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