In 1950 Grabczewski won bronze medal in Polish Junior Chess Championship. From 1953 to 1977 Grabczewski played sixteen times in the Polish Chess Championship's finals, and in 1968 he won tournament in
Łódź. In 1966 he won silver medal in first Polish
Fast Chess Championship. Grabczewski was a multiple medalist in Polish Team Chess Championship, including nine gold medals. Grabczewski took part in more than twenty international tournaments. He won tournament in
Eksjö (1974), stayed in third place in Warsaw (1961),
Lublin (1971),
Marina Romea (1978), and stayed in fourth place in
Dubna (1971). Romuald Grabczewski played for Poland in
Chess Olympiads: • In 1968, at second reserve board in the
18th Chess Olympiad in
Lugano (+2, =4, -1). ==References==