Hex is a board game played on a hexagonal grid, theoretically of
any size and several possible shapes, but traditionally as an
11x11 rhombus. Other popular dimensions are 13x13 and 19x19 as a
result of the game's relationship to the older game of Go.
According to the book A Beautiful Mind, John Nash (one of the
game's inventors) advocated 14x14 as the optimal size. The game
was invented by the Danish mathematician Piet Hein , who
introduced the game in 1942 at the Niels Bohr Institute, and
also independently invented by the mathematician John Nash in
1947 at Princeton University. It became known in Denmark under
the name Polygon (though Hein called it CON-TAC-TIX); Nash 's
fellow players at first called the game Nash . According to
Martin Gardner , some of the Princeton University students also
referred to the game as John (according to some sources this was
because they played the game using the mosaic of the bathroom
floor). In 1952 Parker Brothers marketed a version. They called
their version "Hex" and the