| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. J Cardamone vs J L Watson |
 | 0-1 | 28 |
1969 |
National High School Championship | B76 Sicilian, Dragon, Yugoslav Attack |
| 2. J L Watson vs Lombardy |
| 0-1 | 35 |
1975 |
US Open | B43 Sicilian, Kan, 5.Nc3 |
| 3. J Meyers vs J L Watson |
| 0-1 | 45 |
1976 |
Lone Pine | A10 English |
| 4. J Donaldson vs J L Watson |
| 0-1 | 40 |
1976 |
Paul Keres Memorial | B08 Pirc, Classical |
| 5. J L Watson vs G Forintos |
| 0-1 | 45 |
1976 |
Lone Pine | A10 English |
| 6. M Diesen vs J L Watson |
| 0-1 | 34 |
1976 |
Lone Pine | E69 King's Indian, Fianchetto, Classical Main line |
| 7. J L Watson vs W Martz |
| 0-1 | 35 |
1976 |
Lone Pine | A14 English |
| 8. E Rayner vs J L Watson |
 | 0-1 | 30 |
1978 |
Lloyds Bank | C19 French, Winawer, Advance |
| 9. R C Balinas vs J L Watson |
| 0-1 | 28 |
1978 |
Lloyds Bank | E75 King's Indian, Averbakh, Main line |
| 10. J L Watson vs Y Rantanen |
| 0-1 | 63 |
1978 |
Lloyds Bank | A19 English, Mikenas-Carls, Sicilian Variation |
| 11. J Flesch vs J L Watson |
| 0-1 | 42 |
1978 |
Lloyds Bank | E67 King's Indian, Fianchetto |
| 12. J L Watson vs H Ree |
 | 0-1 | 45 |
1979 |
Lone Pine | A22 English |
| 13. J L Watson vs A Williams |
 | 0-1 | 71 |
1979 |
Marshall Open | A34 English, Symmetrical |
| 14. J L Watson vs K Shirazi |
| 0-1 | 22 |
1979 |
Lone Pine | A28 English |
| 15. J L Watson vs Hjartarson |
| 0-1 | 23 |
1981 |
Lone Pine | A37 English, Symmetrical |
| 16. J L Watson vs Keene |
| 0-1 | 32 |
1981 |
New York (USA) | A36 English |
| 17. R Sulman vs J L Watson |
| 0-1 | 27 |
1981 |
Lone Pine | C05 French, Tarrasch |
| 18. J L Watson vs V McCambridge |
| 0-1 | 34 |
1981 |
Lone Pine | A37 English, Symmetrical |
| 19. D Root vs J L Watson |
 | 0-1 | 23 |
1981 |
Lone Pine | B22 Sicilian, Alapin |
| 20. J L Watson vs Igor Ivanov |
 | 0-1 | 38 |
1983 |
? | B13 Caro-Kann, Exchange |
| 21. J L Watson vs C Hertan |
| 0-1 | 33 |
1984 |
CCA February Open | A10 English |
| 22. DeFirmian vs J L Watson |
| 0-1 | 27 |
1984 |
Ch USA | C19 French, Winawer, Advance |
| 23. Browne vs J L Watson |
| 0-1 | 64 |
1993 |
World op Philadelphia | E94 King's Indian, Orthodox |
| 24. J L Watson vs Yermolinsky |
| 0-1 | 41 |
1994 |
it Reno USA | E11 Bogo-Indian Defense |
| 25. J L Watson vs M Donaghay |
| 0-1 | 29 |
1994 |
SNCL Div 1 Aberdeen 1-Castlehill 2 | C52 Evans Gambit |