Havannah is a two-player abstract game played with black and white stones on a hexagonal board, invented by Christian Freeling in 1976. It belongs to the connection family of games such as Hex , Y , Atoll and Gonnect .
In 2002 Christian awarded a prize of €1000 for a program that would beat him once in a ten game match, before the summer of 2012.
Havannah is played on a hexagonal board with 8 or 10 cells per side.
The objective of the game is to be the first to create a ring, or a bridge or a fork:
Draws are possible in Havannah, but they are extremely rare.
The game starts on an empty board.
Each player has stones of his allocated color: white or black.
Players take turns putting one stone on a vacant cell. White begins.
Since the first player has a distinct advantage, the pie rule is sometimes used to make the game fair, in particular 'base-8'. This rule allows the second player to switch colors as his first move.