This test is based on the game of Taefl.
Players take turns moving a boat, with the attacker going first. Boats (including the king now) move like rooks in chess (i.e. as far as they want in any one direction, not including diagonals). Boats may not go through or end their turn on a square occupied by another boat. Also, only the king may end its turn on the center square or the corners (escapes), though other boats may move through the center.
Enemy boats may be captured (with the exception of the king) by placing two of your boats on opposite sides of the enemy boat. You may safely move your own boat between two enemy boats. Multiple boats may be captured at once, i.e. if the board looks like A D [] D A, the attacker can move between the two defenders (A D A D A) and capture both. However going from A D D [] to A D D A does not capture.
The king may be captured if the attacker fills all four adjacent squares surrounding the king. If the king is on the edge, just fill the other 3 squares. If the king is on the center (the "throne"), it takes only 2 attackers to capture.
The throne (center) counts as both defender and attacker ships. As do the corners.
The attacker wins the game by capturing the king. The defender wins by getting the king to one of the four corners of the board.