谜题 487724: 白方将死
谜题 487724: 白方将死
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Johnny Hass - Edwin Pock
Joinville open Joinville (3), 1977 Johnny Hass - Edwin Pock
Joinville open Joinville (3), 1977
Joinville open Joinville (3), 1977 Johnny Hass - Edwin Pock
Joinville open Joinville (3), 1977
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这个谜题的主要主题是：Swallow's tail mate
In swallow's tail mate, a queen checkmates the king. The queen is orthogonally adjacent to the king. The king is not on the edge of the board. The two escape squares not guarded by the queen are blocked by its own pieces. A swallow's tail mate is also possible with a rook, when other pieces guard the additional escape squares.
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