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| Rank | Player | Age | Tournament |
|---|---|---|---|
| 1 | 10y 259d | St. Louis WCT 1972 | |
| 2 | 10y 294d | Johannesburg-2 1976 | |
| 3 | 11y 300d | Johannesburg-2 1977 | |
| 4 | 13y 153d | San Juan 1968 | |
| 5 | 14y 360d | Tel Aviv 1990 | |
| 6 | 15y 4d | Pune 2023 | |
| 7 | 15y 17d | London-2 1968 | |
| 8 | 15y 59d | Livingston 1988 | |
| 9 | 15y 66d | Rye Brook 1988 | |
| 10 | 15y 108d | Scottsdale 1988 |
