A huge 16×16 board with doubled armies.
How to play
A 16×16 battlefield with doubled armies. Each side has one king plus 3 queens, 4 rooks, 4 bishops, 4 knights and 16 pawns. Pieces move as in normal chess (long sliders are deadly here); pawns may double-step on their first move, capture en passant, and promote to a queen on the far rank. No castling. Checkmate the bot to win; stalemate and the 50-move rule are draws.