This rules of this game are the same as for normal Chess (starting position and piece movement) with the following differences:
No castling is allowed.
A pawn can promote to king.
There is no check or checkmate.
Who loses all pieces including the king or cannot make a legal move, wins the game.
Capturing of the opponent's pieces is mandatory. The player can make a move only with a piece that can capture an opponent's piece, and he/she must capture this piece. Only if the player cannot capture any opponent piece, he/she can make a move with any piece.