United States Congress | ATP International Series | 66th United States Congress | 74th United States Congress | 18th United States Congress | 73rd United States Congress | 54th United States Congress | 61st United States Congress | 64th United States Congress | 65th United States Congress | 53rd United States Congress | 52nd United States Congress | 55th United States Congress | 68th United States Congress | 56th United States Congress | 62nd United States Congress | Library of Congress | 72nd United States Congress | 47th United States Congress | 60th United States Congress | 63rd United States Congress | 51st United States Congress | 48th United States Congress | 71st United States Congress | 76th United States Congress | 67th United States Congress | 57th United States Congress | 46th United States Congress | International Monetary Fund | 50th United States Congress |
As an active tournament player in the 1960s and 1970s, he achieved many fine results, including sharing or winning outright first place at Sarajevo 1965, Copenhagen 1965, Titovo Uzice 1966, Hastings 1967/68, Havana 1969, Albena 1970, Kecskemet 1972, Brno 1975 (the inaugural Czech Open Championship – the title of Champion going to Vlastimil Hort on tie-break), Lublin 1976, and Dubna 1979.
In other competition, he achieved outright or shared first place at Hastings 1973/74 (with Szabó, Tal and Timman), Baku 1977, Tallinn 1979, Kladovo 1980, Dortmund 1981 (with Speelman and Ftáčnik) and Bangalore 1981.
Further international tournament victories were scored at East Berlin 1962, Sarajevo 1967, Hastings 1967–68, Kecskemét 1968, Tallinn 1969, Pärnu 1971, and Las Palmas 1973.
A cheerful and popular character on the grandmaster circuit, his tournament record is outstanding and includes further victories at Kragujevac 1974, São Paulo 1977, Kirovakan 1978, Las Palmas 1979, Manila 1981, Hastings 1982/83, Biel 1985 (the Interzonal), Leningrad 1987, Toronto 1990 and Ter Apel 1992.
His tournament victories include Hastings Challengers 1966, Slater Challenge Southend 1968, Johannesburg 1973, Woolacombe 1973, Capablanca Memorial (Master Group) 1974, Alicante 1977, Sydney 1979, Dortmund 1980, Barcelona 1980, Lloyds Bank Masters 1981, Adelaide 1983 and La Valletta 1985.
Tournaments he has won or shared first include the 1969 Swedish Chess Championship, Göteborg 1971, Dortmund 1973, Camagüez 1974, Cienfuegos 1975, Belgrade 1977, Buenos Aires 1978, Hastings 1978–79, Phillips & Drew 1980, Johannesburg 1981, Phillips & Drew 1982, Turin 1982, Wijk aan Zee 1983, Reggio Emilia 1985, Rome 1985, and Rome 1986.