Materials Huaca is played on the spaces of a 9x9 Sudoku like board that is divided into nine 3x3 sub-boards. You will also need a supply of black and white stones. Definitions Adjacent – means orthogonally adjacent. Pair - two friendly stones. Group- Two or more adjacent friendly stones. Play Board starts out empty. Black starts, swap rules apply, then turns alternate. On a turn take one of the following actions. 1. Drop a pair of stones onto two adjacent empty spaces that are not adjacent to a group or 2. Drop one friendly stone onto an empty space that is either adjacent to an enemy or friendly stone already on the board The game ends when a player is unable to take his turn. Goal A 3x3 board is won by a majority of grouped friendly pieces. The game is won by a majority of won 3x3 boards.