| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. W Watson vs C P Gawood |
 | 1-0 | 27 |
1977 |
British Chess Federation Junior Championship | B40 Sicilian |
| 2. W Watson vs A J Whiteley |
| 1-0 | 40 |
1978 |
Ayr British ch | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 3. W Watson vs Cafferty |
| ½-½ | 19 |
1978 |
Ayr British ch | B32 Sicilian |
| 4. W Watson vs Murey |
| 0-1 | 36 |
1982 |
Brighton | B21 Sicilian, 2.f4 and 2.d4 |
| 5. W Watson vs Shamkovich |
| 1-0 | 27 |
1982 |
Brighton (England) | B21 Sicilian, 2.f4 and 2.d4 |
| 6. W Watson vs Murey |
| 0-1 | 41 |
1983 |
Brighton | B23 Sicilian, Closed |
| 7. W Watson vs Razuvaev |
| 0-1 | 41 |
1983 |
Lloyds Bank op | B21 Sicilian, 2.f4 and 2.d4 |
| 8. W Watson vs Kupreichik |
| 1-0 | 51 |
1984 |
Hastings | B23 Sicilian, Closed |
| 9. W Watson vs Romanishin |
| ½-½ | 13 |
1985 |
Frunze | B46 Sicilian, Taimanov Variation |
| 10. W Watson vs K Spraggett |
 | 0-1 | 43 |
1985 |
Ch. du Commonwealth | B23 Sicilian, Closed |
| 11. W Watson vs Chandler |
| ½-½ | 22 |
1985 |
It (open) | B25 Sicilian, Closed |
| 12. W Watson vs T Karolyi Jr. |
| 1-0 | 24 |
1986 |
OHRA-B | B23 Sicilian, Closed |
| 13. W Watson vs N Gaprindashvili |
| 0-1 | 53 |
1987 |
Brussels (Belgium) | B62 Sicilian, Richter-Rauzer |
| 14. W Watson vs Portisch |
| 0-1 | 58 |
1987 |
New York | B46 Sicilian, Taimanov Variation |
| 15. W Watson vs Fedorowicz |
| ½-½ | 24 |
1987 |
Ostend (Belgium) | B46 Sicilian, Taimanov Variation |
| 16. W Watson vs Chiburdanidze |
| 1-0 | 24 |
1987 |
Brussels mix | B35 Sicilian, Accelerated Fianchetto, Modern Variation with Bc4 |
| 17. W Watson vs A Greenfeld |
| 1-0 | 34 |
1987 |
Beersheba | B45 Sicilian, Taimanov |
| 18. W Watson vs Fedorowicz |
| ½-½ | 15 |
1987 |
It (open) | B81 Sicilian, Scheveningen, Keres Attack |
| 19. W Watson vs J Benjamin |
| 1-0 | 33 |
1987 |
It (open) | B46 Sicilian, Taimanov Variation |
| 20. W Watson vs Larsen |
| ½-½ | 36 |
1988 |
Esbjerg | B35 Sicilian, Accelerated Fianchetto, Modern Variation with Bc4 |
| 21. W Watson vs Kupreichik |
 | 0-1 | 40 |
1988 |
Esbjerg 46/280 | B90 Sicilian, Najdorf |
| 22. W Watson vs Matulovic |
| ½-½ | 41 |
1989 |
Haringey | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 23. W Watson vs Kudrin |
| 1-0 | 53 |
1989 |
Cup World (open) | B77 Sicilian, Dragon, Yugoslav Attack |
| 24. W Watson vs Polugaevsky |
| ½-½ | 20 |
1989 |
Palma 1 | B23 Sicilian, Closed |
| 25. W Watson vs Larsen |
| ½-½ | 61 |
1989 |
London WFW | B30 Sicilian |