Cube

In Cube you play against the computer and you place stones, in turn. Each stone borders the latest stone placed, either horizontally or vertically. A tile is allowed to border another tile or the gameboard's edge only if the boundary between them is inbetween unequal colors. A player wins a set if he or she is the first player to place a stone bordering the gameboard's edge. If you win a set, then all stones vanish and you can claim a field by locating one of your own castles. A player wins the game if he or she is the first one who located 10 castles in the gameboard.