Check out Atomic Chess, our featured variant for November, 2024.

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Circe Progressive Chess

If you had a Java-capable browser, you could play Circe Progressive Chess here.
Keys "s"=save "l"=load "b"=back once

Roberto Gravino, 1979. A popular way to play Circe Chess.

This is evidently the standard variant of the progressive game. Unlike in ordinary Circe Chess, captured units return to their true squares of origin if unoccupied.

No giving check until the last move of a turn. Chess Variants