-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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-Dynamo chess
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-Maxima, Interweave, Roccoco
+Would be nice to display some better variants names (Pacosako -> Paco-Ŝako etc),
+but the "formatted" name with uppercase + all lower cases would still be required.
+(For example in variants list, or tournament variant field).