Minister M. Vrolijk opens the 5th IBM master tournament. After the minister had activated the computer, which made the draw, he looks with the grandmasters Laszlo Szabo (left) and Jan Hein Donner the result Date: 19 July 1965 Location: Amsterdam, Noord-Holland Keywords: ministers, openings, chess, competitions Personal name: Donner, Jan Hein, Szabo, Laszlo, Vrolijk, M.

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