Dutch International Master (1975), writer, chess columnist and well-known chess commentator at Tata Steel. In 1988, he established a world record by playing simultaneously 560 opponents in 24 hours with a winning percentage of 94%.
Dutch Youth Champion 1968, Dutch Rapid Chess Champion in 1988, Dutch Senior Champion in 2010.
Best results: IBM Group B 1973, 2-3rd; Ekso 1974, 1-4th; IBM Group A 1975, 2-5th; Dutch championship 1975, 2nd; Eerbeek GM 1978, 2nd; Bonn Staudte Memorial 1979, 3-5th.
Dutch International Master (1975), writer, chess columnist and well-known chess commentator at Tata Steel. In 1988, he established a world record by playing simultaneously 560 opponents in 24 hours with a winning percentage of 94%.