| 1 | A | B | C | D | E | F | G |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 2 | Lone Pine International - Summary |  |  |  |  |  |  |
| 3 | Year | Dates | Rounds | Field | Avg. Elo | Top score | Winners |
| 4 | 1971 | March 14–20 | 7 | 33 | 2190 | 6 | Larry Evans (United States) |
| 5 | 1972 | March 12–18 | 7 | 35 | 2262 | 6 | Svetozar Gligorić (Yugoslavia) |
| 6 | 1973 | March 18–24 | 7 | 48 | 2322 | 6 | Arthur Bisguier (United States) |
| 7 | 1974 | March 24–30 | 7 | 53 | 2310 | 6 | Walter Browne (United States) |
| 8 | 1975 | April 13–24 | 10 | 44 | 2428 | 7½ | Vladimir Liberzon (Israel) |
| 9 | 1976 | March 7–13 | 7 | 57 | 2371 | 5½ | Tigran Petrosian (Soviet Union) |
| 10 | 1977 | March 20–30 | 9 | 48 | 2410 | 6½ | Yuri Balashov (Soviet Union) Dragutin Sahović (Yugoslavia) Oscar Panno (Argentina) Nona Gaprindashvili (Soviet Union) |
| 11 | 1978 | April 1–12 | 9 | 68 | 2431 | 7½ | Bent Larsen (Denmark) |
| 12 | 1979 | March 25–April 4 | 9 | 73 | 2444 | 6½ | Svetozar Gligorić (Yugoslavia) Florin Gheorghiu (Romania) Vladimir Liberzon (Israel) Vlastimil Hort (Czechoslovakia) |
| 13 | 1980 | March 16–26 | 9 | 43 | 2487 | 7 | Roman Dzindzichashvili (Israel) |
| 14 | 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.