The Hex Game is an invention of Hein but it’s also a discovery of Nash but after him. So it’s a positional game, it’s a connection game, it’s also a perfect information game and of course a strategic game. So we have two players, we can play like this on the board and the idea is to connect our stones like this or like this and we know that it’s impossible to have a draw so it’s very important to see that even if it’s not obvious it’s a fact that there is a winner and it was the theorem of Nash.