TODO

   1 # New variants
   2 Doublearmy: 2 kings remaining get mated.
   3
   4 Landing pieces from empty board:
   5 https://www.chessvariants.com/diffsetup.dir/unachess.html
   6 Parachute v1 & 2
   7
   8 Generator variant, called "Matrix" ?
   9 Peces on first rank never move but generate new pieces. Pawn don't generate.
  10 A generator captured and replaced by a similar piece does not generate.
  11 King does not generate. No castling. En passant possible?
  12 Goal is still checkmate.
  13
  14 Take(a)n(d)make : if capture a piece, take its power for the last of the turn and make a move like it.
  15 If a pawn taken: direction of the capturer.
  16
  17 Dynamo chess
  18
  19 Maxima, Interweave, Roccoco