Monster Chess
Played this before on another website for chess variant
black will always win if he knows what to do(force trade pawns, corner off the king using supported queen(2 moves are not enough to get rid of the non moving queen that is supported and then return to safety)
then safely promote all your pawns
(Tip: do not check him unless you ensure checkmate as he can pass moves by going on a square and back so there will be no stalemate)
a5