Lone Pine International
Summary

Year
Dates
Rounds
Field
Avg. Elo
Top score
Winners
1971
March 14–20
7
33
2190
6
Larry Evans (United States)
1972
March 12–18
7
35
2262
6
Svetozar Gligorić (Yugoslavia)
1973
March 18–24
7
48
2322
6
Arthur Bisguier (United States)
1974
March 24–30
7
53
2310
6
Walter Browne (United States)
1975
April 13–24
10
44
2428
7½
Vladimir Liberzon (Israel)
1976
March 7–13
7
57
2371
5½
Tigran Petrosian (Soviet Union)
1977
March 20–30
9
48
2410
6½
Yuri Balashov (Soviet Union) Dragutin Sahović (Yugoslavia) Oscar Panno (Argentina) Nona Gaprindashvili (Soviet Union)
1978
April 1–12
9
68
2431
7½
Bent Larsen (Denmark)
1979
March 25–April 4
9
73
2444
6½
Svetozar Gligorić (Yugoslavia) Florin Gheorghiu (Romania) Vladimir Liberzon (Israel) Vlastimil Hort (Czechoslovakia)
1980
March 16–26
9
43
2487
7
Roman Dzindzichashvili (Israel)
1981
March 29–April 8
9
61
-
7
Viktor Korchnoi (Switzerland)

Question: When was the United States most successful at Lone Pine International?
Answer: The United States first won Lone Pine International in 1971 and last won Lone Pine International in 1974.