-Generator variant, called "Matrix" ?
-Peces on first rank never move but generate new pieces. Pawn don't generate.
-A generator captured and replaced by a similar piece does not generate.
-King does not generate. No castling. En passant possible?
-Goal is still checkmate.
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-Take(a)n(d)make : if capture a piece, take its power for the last of the turn and make a move like it.
-If a pawn taken: direction of the capturer.
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-Maxima, Interweave, Roccoco
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-Synchrone Chess: allow to anticipate en-passant capture as well :)
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-Dynamo chess
+Non-chess: ( won't add draughts: https://lidraughts.org/ )
+Avalam, Fanorona https://fr.wikipedia.org/wiki/Fanorona
+Yoté https://fr.wikipedia.org/wiki/Yot%C3%A9 http://www.zillionsofgames.com/cgi-bin/zilligames/submissions.cgi/92187?do=show;id=960
+Qoridor: reserve moves to place the walls, convention from left / from top