-Landing pieces from empty board:
-https://www.chessvariants.com/diffsetup.dir/unachess.html
-Parachute v1 & 2
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-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.