The king , rook , and knight move as in usual chess. Pawns move as in usual chess, but have no initial double move, and more complicated promotion rules. Pawns move in the expected direction, i.e., every pawn must move 6 times to get to their final rank. There is no castling. The boat jumps two squares diagonally.
All pieces take as they move, with one addition special case, called the triumph of the boat .
When a boat moves to form a square of four boats, then he takes the other three. Look at the following example. Boats on d4, d5, e5. A boat on g7 moves to e5. When the boat on g7 moves to e5, then it takes the other three boats with this move.