Invented by Philip Cohen in the 1960s, Null Chess appears in the Classified Encyclopedia of Chess Variants, section 4.4.
When a capture square is vacated, it becomes Null. Null squares cannot be occupied or passed over.
Also, no en passant.
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Author: Ben M Reiniger. Inventor: Philip M. Cohen.
Web page created: 2020-04-26. Web page last updated: 2020-04-26