The reason, I guess, is that if it were not so, the King could position itself next to the centre square and never be captured, even if it couldn't escape that way as the requirement is to place pieces on all 4 sides.
(verberg) U kunt simpele HTML-code gebruiken in uw berichten, en betalende leden kunnen ook gebruik maken van de Rich Text Editor. (pauloaguia) (laat alle tips zien)