Black and White

immunity chess puzzle

Black is clearly lost. But there are two squares on which his king can never be checkmated, even if White is allowed to make consecutive moves and checks are ignored. What are they?

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b2 and g7. In order to trap the black king completely there, White would need at least one square beyond the edge of the board. (For example, if the black king is on b2, then White can mate by putting his king on b4, his queen on b3, and his bishop just “below” the b1 square.) From Stephen Addison, The Book of Extraordinary Chess Problems, 1989.

October 13, 2020October 11, 2020 | Puzzles