Keys "s"=save "l"=load "b"=back once
Units captured on one board join the reserves on the other board and may be added instead of moving a unit. Here "Tandem Rules" are in effect, and you may NOT place a unit to check or mate the opposing king. Promoted units that are passed revert to pawns. Both games count for the final score.
Chess and Tandem Chess
These are simple illustrations rather than strong opponents.
Bug reports? -- Thank you! Keep them coming!