Two-player, strategy game Abalone was invented in 1990 by Laurent Levi and Michel Lalet. The concept of the game is based on the popular Japanese Sumo wrestling.
The board is a hexagonal field representing the Sumo arena. There are 4 interlaced different size hexagons, where the most exterior hexagon has 5 circular locations at each side. In the middle there is a single location. As a total, there are 61 circular board locations. Each player has fourteen pieces that can rest in these locations. In initial game position Green pieces are at the top three rows, and Red is at bottom three rows.
Starting from the initial configuration, each player takes a turn. During a turn, a player can shift one, two, or three pieces together in any of the six directions, provided that there is an adjacent space, i.e., in line or broadside. Furthermore, whenever a player has a numerical superiority in a line (three to two, three to one, or two to one), during a turn the player is allowed to push the opposing marbles with an inline move.
Players take turns “pushing” 1, 2 or 3 linearly connected pieces, attempting to push their opponents’ pieces off the board. First player to push 6 of their opponent’s pieces off the board wins. One of the players can be the computer.