This is a two-player game. One plays as Alpha and the other as Delta. All of the players' pieces move as a rook (either horizontally or vertically). Pieces cannot cross other pieces nor overlap them. Capture the other player's pieces by surrounding them in cells (squares) adjacent to them. Multiple pieces can be captured at once. If at most one of the other player's pieces remain, they lose the game (because they cannot capture the opponent's pieces with just one piece). If a player cannot make a move or they want to skip, well, just press the skip button.
Based on the principles of Hasami Shogi (from the NDS Clubhouse Games). Note that diagonal captures are not possible, and neither can corner pieces be captured. The cells start from 1 at the bottom-left square, and goes upwards, left-right, reaching 81 at the top-right square