Tony Paletta wrote on Mon, Sep 29, 2003 04:31 PM UTC:
A somewhat different, but related idea might be 'Amphibian Chess' (not
previously published; name chosen in comparison to 'Mermaid Chess' and a
tendency, in the problem lit, to use sea creature names for
vault-to-capture pieces). Play is on an 8x8 board, and units must jump
over to capture if there is a next square beyond the opposing unit, but
capture by displacement if there is not.