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OK, here's my entry: <H2>Bifocal Chess</H2> <P>It is the opposite of V.R. Parton's Neutral King, where both teams try to mate the same King. Here, most pieces threaten both Kings: <BR>Something like (on a 9x9 Board): <P>White <BR>King e1, Man e2, Firz d2,f2, Wazir c2,g2 <P>Black <BR>King e9, Man e8, Firz d8,f8, Wazir c8,g8 <P>Red <BR>Rook a5,i5, Kan(n)on b5,h5, Falcon c5,g5, PS-Bishop d5,f5, Immobilizer e5, Knight a1,a9,i1,i9 <P>The Kan(n)on is a convergent, Korean-like, version of my Can(n)on. It moves as a jumping Rook or a jumping Bishop, and can change orientation at each move. <BR>The Falcon is George Duke's Falcon in Falcon Chess. <BR>The PS-Bishop moves as a Bishop or a Wazir. <P>The Immobilizer doesn't affect the Kings, but it does freeze any other adjacent piece. <P>The Man - a non-royal Chess King, the Wazir and the Firz aren't restricted to empty squares. They can swap with any adjacent Man, Wazir or Firz of their color. (Thus the Firzes are not colorbound.) <P>The Kings move more or less by igui, that is, they are allowed a double step in any direction, but they cannot pass through a square which is threatened by a neutral piece. (Like castling, or Fergus Duniho's royal Queen in British Chess.) <P>You must checkmate your opponent's King with a neutral piece. The Kings are weak, because they cannot capture (and it is not easy to get rid of an adjacent PS-Bishop). The Immobilizer and the non-neutral pieces do not put the Kings in check, but they stand in their way like anyone else. <P>You cannot move the neutral piece your opponent has just moved, and you cannot move the Immobilizer if you moved it at your last turn.