Army vs Knight, Bishop, Rook + Queen

You play White with the full set of sixteen pieces. Black has a king, eight pawns and a knight, a bishop, a rook and a queen. Checkmate the black king to win. This is real chess with real rules, so castling, en passant and promotion all work, and a pawn that reaches the far side becomes a queen.

This is nearly a full game of chess. Develop your pieces, castle early, and use your extra pieces to win material slowly.

Three levels: on easy Black moves at random, on medium it usually grabs a piece you leave undefended, and on hard a real chess engine looks a few moves ahead. Win once for a silver star, and ten times without undo for a gold one.