| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. D Gormally vs S Zeidler |
 | 1-0 | 26 | 1999 | Dyfed op | A80 Dutch |
| 27. S Williams vs S Zeidler |
| 1-0 | 34 | 2000 | BCF-chT 0001 (4NCL) | A85 Dutch, with c4 & Nc3 |
| 28. S Zeidler vs N Sulava |
| ½-½ | 29 | 2000 | Istanbul Olympiad | B23 Sicilian, Closed |
| 29. B Kelly vs S Zeidler |
| 1-0 | 37 | 2001 | 4NCL | A88 Dutch, Leningrad, Main Variation with c6 |
| 30. S Zeidler vs S Dishman |
| ½-½ | 62 | 2001 | 4NCL | B25 Sicilian, Closed |
| 31. R S Jones vs S Zeidler |
| 1-0 | 48 | 2001 | Welsh Championship | B01 Scandinavian |
| 32. S Zeidler vs A Cast |
| 1-0 | 33 | 2001 | Welsh Championship | C01 French, Exchange |
| 33. J D Turner vs S Zeidler |
| 0-1 | 57 | 2001 | Welsh Championship | D00 Queen's Pawn Game |
| 34. S Zeidler vs L Williams |
| 1-0 | 22 | 2001 | Welsh Championship | B25 Sicilian, Closed |
| 35. S Zeidler vs J Cobb |
| 1-0 | 64 | 2001 | Welsh Championship | C47 Four Knights |
| 36. G Morris vs S Zeidler |
| 0-1 | 35 | 2001 | Welsh Championship | A81 Dutch |
| 37. S Zeidler vs A Spice |
| ½-½ | 55 | 2001 | Welsh Championship | C01 French, Exchange |
| 38. S Zeidler vs S Conquest |
| 0-1 | 52 | 2001 | 4NCL | B25 Sicilian, Closed |
| 39. S Zeidler vs P K Wells |
| ½-½ | 18 | 2001 | 4NCL | B25 Sicilian, Closed |
| 40. S Zeidler vs D Bryson |
| 0-1 | 54 | 2001 | 4NCL | B01 Scandinavian |
| 41. S Zeidler vs Tiviakov |
| 0-1 | 26 | 2001 | European Team Championship | B23 Sicilian, Closed |
| 42. D Bryson vs S Zeidler |
| 1-0 | 30 | 2001 | European Team Championship | B01 Scandinavian |
| 43. P Klerides vs S Zeidler |
| 0-1 | 32 | 2001 | European Team Championship | B01 Scandinavian |
| 44. S Zeidler vs C Wagener |
| ½-½ | 71 | 2001 | European Team Championship | C01 French, Exchange |
| 45. S Zeidler vs I Seitaj |
| ½-½ | 26 | 2001 | European Team Championship | C44 King's Pawn Game |
| 46. K Haznedaroglu vs S Zeidler |
| 1-0 | 34 | 2001 | European Team Championship | B01 Scandinavian |
| 47. M Heidenfeld vs S Zeidler |
| 1-0 | 64 | 2001 | European Team Championship | B01 Scandinavian |
| 48. S Zeidler vs A Fernandes |
| 0-1 | 23 | 2001 | European Team Championship | B23 Sicilian, Closed |
| 49. N Berry vs S Zeidler |
| ½-½ | 74 | 2002 | Swansea jubilee | A88 Dutch, Leningrad, Main Variation with c6 |
| 50. S Zeidler vs P Thipsay |
| 0-1 | 45 | 2002 | Bled Olympiad | C44 King's Pawn Game |
Kibitzing
