 He was Hungarian Champion in 1972 and 1973 (jointly).His tournament victories include Olot 1973, Cleveland 1975, Olot 1975, Pula Zonal 1975, Berlin 1979, Copenhagen 1983, Järvenpää 1985 and Delhi 1987.Csom played for the Hungarian team in seven Chess Olympiads (1968–1974, 1978–1982, 1986–1988).