| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. S Zeidler vs Fedorov |
 | 0-1 | 30 |
2002 |
Bled Olympiad | B23 Sicilian, Closed |
| 27. S Zeidler vs P Thipsay |
| 0-1 | 45 |
2002 |
Bled Olympiad | C44 King's Pawn Game |
| 28. F Garmendez vs S Zeidler |
| 1-0 | 74 |
2002 |
Bled Olympiad | B01 Scandinavian |
| 29. V Georgiev vs S Zeidler |
| 1-0 | 30 |
2003 |
EU-chT (Men) | A87 Dutch, Leningrad, Main Variation |
| 30. S Zeidler vs T Nyback |
| 0-1 | 48 |
2003 |
EU-chT (Men) | B07 Pirc |
| 31. S Zeidler vs Plaskett |
| 0-1 | 37 |
2005 |
14th Bora Kostic Mem | B23 Sicilian, Closed |
| 32. A Spice vs S Zeidler |
| 1-0 | 36 |
2007 |
53rd Welsh Championship | A00 Uncommon Opening |
| 33. S Zeidler vs D Guy |
| 1-0 | 36 |
2007 |
53rd Welsh Championship | B23 Sicilian, Closed |
| 34. S Zeidler vs J Trevelyan |
| ½-½ | 37 |
2007 |
53rd Welsh Championship | B00 Uncommon King's Pawn Opening |
| 35. S Zeidler vs I Snape |
| ½-½ | 30 |
2007 |
4NCL 2006-07 | B23 Sicilian, Closed |
| 36. S D Cunliffe vs S Zeidler |
| 0-1 | 36 |
2007 |
53rd Welsh Championship | B01 Scandinavian |
| 37. A Ashton vs S Zeidler |
| ½-½ | 57 |
2007 |
4NCL 2006-07 | B01 Scandinavian |
| 38. R Van Kemenade vs S Zeidler |
| 0-1 | 33 |
2007 |
53rd Welsh Championship | A85 Dutch, with c4 & Nc3 |
| 39. S Zeidler vs D Jameson |
| ½-½ | 69 |
2007 |
53rd Welsh Championship | B12 Caro-Kann Defense |
| 40. S Zeidler vs D Sully |
| 1-0 | 55 |
2007 |
53rd Welsh Championship | C01 French, Exchange |
| 41. S Knott vs S Zeidler |
| 0-1 | 54 |
2008 |
Club Argentino-Ruibal | A88 Dutch, Leningrad, Main Variation with c6 |
