| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Arkell vs S Williams |
| 1-0 | 63 |
1994 |
Lloyds Bank op 18th | A96 Dutch, Classical Variation |
| 2. N Pert vs S Williams |
| 1-0 | 80 |
1994 |
Aberdeen op | A96 Dutch, Classical Variation |
| 3. Plaskett vs S Williams |
| 1-0 | 64 |
1997 |
BCF-ch 84th | A96 Dutch, Classical Variation |
| 4. N V Pedersen vs S Williams |
| 0-1 | 38 |
1998 |
Nordre Efteraar | A96 Dutch, Classical Variation |
| 5. Sundararajan vs S Williams |
| 1-0 | 27 |
1999 |
Ch Great Britain, Scarborough (England) | A96 Dutch, Classical Variation |
| 6. A Cooper vs S Williams |
 | 0-1 | 22 |
1999 |
Ch Great Britain, Scarborough (England) | A96 Dutch, Classical Variation |
| 7. Arkell vs S Williams |
| 1-0 | 59 |
2000 |
BCF-ch 87th | A96 Dutch, Classical Variation |
| 8. James Vigus vs S Williams |
| ½-½ | 52 |
2000 |
Smith & Williamson YM 10th | A96 Dutch, Classical Variation |
| 9. C Hanley vs S Williams |
| 1-0 | 69 |
2001 |
10th Monarch Assurance | A90 Dutch |
| 10. J Gallagher vs S Williams |
 | 0-1 | 35 |
2001 |
10th Monarch Assurance | A96 Dutch, Classical Variation |
| 11. Hebden vs S Williams |
| 1-0 | 24 |
2001 |
Smith & Williamson ch-GBR | A90 Dutch |
| 12. O Gladyszev vs S Williams |
| ½-½ | 12 |
2001 |
SWYM | A81 Dutch |
| 13. C Beaumont vs S Williams |
| ½-½ | 67 |
2001 |
4NCL | A96 Dutch, Classical Variation |
| 14. T Nixon vs S Williams |
 | 0-1 | 34 |
2002 |
British Chess Championships | A96 Dutch, Classical Variation |
| 15. J Lechtynsky vs S Williams |
 | 0-1 | 40 |
2002 |
Budapest FS09 GM | A96 Dutch, Classical Variation |
| 16. V Mikhalevski vs S Williams |
| 0-1 | 44 |
2003 |
Monarch Assurance 12th | A96 Dutch, Classical Variation |
| 17. D Dumitrache vs S Williams |
 | 0-1 | 28 |
2003 |
Festival de Montpellier - Masters | A96 Dutch, Classical Variation |
| 18. C Crouch vs S Williams |
| ½-½ | 78 |
2003 |
Portsmouth op | A96 Dutch, Classical Variation |
| 19. Timothy Woodward vs S Williams |
| ½-½ | 32 |
2003 |
BCF-ch | A96 Dutch, Classical Variation |
| 20. A Muir vs S Williams |
| 1-0 | 41 |
2003 |
Hastings Challengers 0304 | A84 Dutch |
| 21. A Kuzmin vs S Williams |
| ½-½ | 23 |
2003 |
Monarch Assurance 12th | A96 Dutch, Classical Variation |
| 22. S Halkias vs S Williams |
| ½-½ | 44 |
2003 |
Monarch Assurance 12th | A84 Dutch |
| 23. Flear vs S Williams |
| 1-0 | 28 |
2003 |
Montpellier op | A96 Dutch, Classical Variation |
| 24. Sasikiran vs S Williams |
| 1-0 | 30 |
2004 |
Dos Hermanas | A91 Dutch Defense |
| 25. J Rowson vs S Williams |
 | 1-0 | 26 |
2004 |
Smith & Williamson British Championships | A99 Dutch, Ilyin-Genevsky Variation with b3 |