| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 301. S Williams vs D E Cori Tello |
| 1-0 | 39 |
2009 |
Reykjavik Open | E12 Queen's Indian |
| 302. S Williams vs S Gordon |
 | 1-0 | 31 |
2009 |
British Championship | D85 Grunfeld |
| 303. G Lane vs S Williams |
| 0-1 | 29 |
2009 |
British Championship | B56 Sicilian |
| 304. S Williams vs L Trent |
| ½-½ | 7 |
2009 |
Howard Staunton Memorial | D09 Queen's Gambit Declined, Albin Counter Gambit, 5.g3 |
| 305. S Williams vs M Naslund |
| 1-0 | 37 |
2009 |
Reykjavik Open | A27 English, Three Knights System |
| 306. S Williams vs Hebden |
| 1-0 | 32 |
2009 |
British Championship | E76 King's Indian, Four Pawns Attack |
| 307. S Williams vs E Wiersma |
| ½-½ | 28 |
2009 |
Howard Staunton Memorial | A80 Dutch |
| 308. S Williams vs M Neubauer |
| ½-½ | 24 |
2009 |
17th European Team Championship | D38 Queen's Gambit Declined, Ragozin Variation |
| 309. G Kjartansson vs S Williams |
| ½-½ | 30 |
2009 |
Hastings Chess Congress | A96 Dutch, Classical Variation |
| 310. S Williams vs M Meszaros |
| 0-1 | 41 |
2009 |
Reykjavik Open | E61 King's Indian |
| 311. S Williams vs C Ross |
| 1-0 | 35 |
2009 |
British Championship | D37 Queen's Gambit Declined |
| 312. Korchnoi vs S Williams |
| 1-0 | 76 |
2009 |
Howard Staunton Memorial | E81 King's Indian, Samisch |
| 313. C Vernay vs S Williams |
| 1-0 | 78 |
2009 |
Reykjavik Open | A56 Benoni Defense |
| 314. S Williams vs J Rudd |
| 1-0 | 22 |
2009 |
British Championship | E10 Queen's Pawn Game |
| 315. T Chapman vs S Williams |
| 0-1 | 31 |
2009 |
Howard Staunton Memorial | B04 Alekhine's Defense, Modern |
| 316. P Wells vs S Williams |
| ½-½ | 53 |
2009 |
British Championship | E92 King's Indian |
| 317. S Feller vs S Williams |
| 1-0 | 40 |
2009 |
17th European Team Championship | A97 Dutch, Ilyin-Genevsky |
| 318. S Williams vs Conquest |
| ½-½ | 37 |
2009 |
Hastings Chess Congress | D86 Grunfeld, Exchange |
| 319. D Breder vs S Williams |
| ½-½ | 16 |
2009 |
Reykjavik Open | C00 French Defense |
| 320. L Trent vs S Williams |
| 1-0 | 40 |
2009 |
British Championship | B53 Sicilian |
| 321. S Williams vs P Wells |
| 1-0 | 38 |
2009 |
Howard Staunton Memorial | E17 Queen's Indian |
| 322. S Williams vs S Bjornsson |
| 1-0 | 29 |
2009 |
Reykjavik Open | E11 Bogo-Indian Defense |
| 323. S Williams vs W Hendriks |
| 1-0 | 35 |
2009 |
Howard Staunton Memorial | E76 King's Indian, Four Pawns Attack |
| 324. G Jones vs S Williams |
| 0-1 | 44 |
2009 |
British Championship | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 325. Mamedyarov vs S Williams |
| 1-0 | 28 |
2009 |
17th European Team Championship | E73 King's Indian |
