-Saw once a "double challenge" bug, one anonymous and a second one logged
-Both were asked a challenge probably, and both challenges added as different ones.
+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.
+
+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.
+
+Dynamo chess
+
+Maxima, Interweave, Roccoco