| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. S Williams vs D King |
| 0-1 | 24 |
1993 |
Lloyds Bank Masters | A10 English |
| 2. Pavasovic vs S Williams |
| 1-0 | 40 |
1994 |
Budapest FS02 IM-B | C00 French Defense |
| 3. S Williams vs Leko |
| 0-1 | 34 |
1995 |
Canarias | A36 English |
| 4. G Welling vs S Williams |
| 0-1 | 75 |
1995 |
Richmond | A40 Queen's Pawn Game |
| 5. V Malakhov vs S Williams |
| 1-0 | 43 |
1997 |
EU-ch U20 | C05 French, Tarrasch |
| 6. S Williams vs C Beaumont |
| ½-½ | 13 |
1997 |
Newport Masters | C01 French, Exchange |
| 7. S Williams vs Barsov |
| 0-1 | 25 |
1998 |
Oxford GM-B | D31 Queen's Gambit Declined |
| 8. S Williams vs Hebden |
| 0-1 | 42 |
1998 |
Hastings Challengers | A26 English |
| 9. S Williams vs Dao Thien Hai |
| 0-1 | 28 |
1998 |
World Junior Championships | A29 English, Four Knights, Kingside Fianchetto |
| 10. S Williams vs M Simons |
 | 1-0 | 40 |
1999 |
Ch Great Britain, Scarborough (England) | A00 Uncommon Opening |
| 11. A Cooper vs S Williams |
 | 0-1 | 22 |
1999 |
Ch Great Britain, Scarborough (England) | A96 Dutch, Classical Variation |
| 12. S Williams vs Cherniaev |
 | 1-0 | 18 |
1999 |
Hastings Challengers | A10 English |
| 13. Sundararajan vs S Williams |
| 1-0 | 27 |
1999 |
Ch Great Britain, Scarborough (England) | A96 Dutch, Classical Variation |
| 14. S Williams vs Hebden |
| 1-0 | 40 |
1999 |
Israeli League | A26 English |
| 15. J Gallagher vs S Williams |
| 1-0 | 32 |
1999 |
Ch Great Britain, Scarborough (England) | B40 Sicilian |
| 16. Emms vs S Williams |
| ½-½ | 29 |
1999 |
4 Nations Chess League | C06 French, Tarrasch |
| 17. S Williams vs M Turner |
| ½-½ | 31 |
1999 |
Ch Great Britain, Scarborough (England) | A36 English |
| 18. S Williams vs Speelman |
| 0-1 | 40 |
1999 |
BCF-chT 9900 (4NCL) | A10 English |
| 19. M Broomfield vs S Williams |
| ½-½ | 19 |
1999 |
Ch Great Britain, Scarborough (England) | A04 Reti Opening |
| 20. P Wells vs S Williams |
| 1-0 | 23 |
1999 |
Ch Great Britain, Scarborough (England) | A04 Reti Opening |
| 21. D King vs S Williams |
| ½-½ | 24 |
2000 |
Miercurea Ciuc | C18 French, Winawer |
| 22. S Williams vs S Bousbouras |
 | 1-0 | 52 |
2001 |
10th Monarch Assurance | A13 English |
| 23. O Gladyszev vs S Williams |
| ½-½ | 12 |
2001 |
SWYM | A81 Dutch |
| 24. S Williams vs M Buckley |
| 1-0 | 40 |
2001 |
Smith & Williamson ch-GBR | A21 English |
| 25. J Richardson vs S Williams |
| ½-½ | 21 |
2001 |
4NCL | A10 English |