Piet Roozenburg
Piet Roozenburg was a Dutch draughts grandmaster.
He was an important figure in the game, having been the world's draughts champion in 1948, 1951, 1952 and 1954. He created the "Roozenburg system" of play and wrote on the game. He was named Dutch sportsman of the year in 1948.
In his professional life he worked as an economist. His brother Wim was also a successful draughts player.