Piet Hein (1905-1996) was a Danish poet and mathematician, and the first inventor of the game of Hex.
Most of the "grooks" are written in Danish, but some he himself translated into English. The following is an example of these poems, which ought to be taken to heart by all Hex players.
The road to wisdom? Well, it's plain and simple to express: Err and err and err again but less and less and less
Piet Hein designed many Hex puzzles.