| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. D Riegler vs K Bischoff |
| 0-1 | 38 | 1999 | German Championship | A10 English |
| 27. D Suhl vs D Riegler |
| ½-½ | 29 | 1999 | German Championship | E94 King's Indian, Orthodox |
| 28. D Riegler vs M Holzhaeuer |
| ½-½ | 20 | 1999 | German Championship | E11 Bogo-Indian Defense |
| 29. U Kersten vs D Riegler |
| 1-0 | 34 | 1999 | German Championship | B57 Sicilian |
| 30. J Bruch vs D Riegler |
| 1-0 | 30 | 1999 | German Championship | A05 Reti Opening |
| 31. D Riegler vs F Janz |
| ½-½ | 13 | 1999 | German Championship | D23 Queen's Gambit Accepted |
| 32. D Riegler vs E Schunk |
| 0-1 | 32 | 1999 | German Championship | E76 King's Indian, Four Pawns Attack |
| 33. S Gottschling vs D Riegler |
| 1-0 | 35 | 1999 | German Championship | B14 Caro-Kann, Panov-Botvinnik Attack |
| 34. L Gutman vs D Riegler |
| 1-0 | 34 | 2000 | German Chess Championship | A49 King's Indian, Fianchetto without c4 |
| 35. R Mainka vs D Riegler |
| 1-0 | 29 | 2001 | Bad Woerishofen Open | B62 Sicilian, Richter-Rauzer |
| 36. D Riegler vs R Rabiega |
| 0-1 | 29 | 2001 | German Championship | D39 Queen's Gambit Declined, Ragozin, Vienna Variation |
| 37. F Handke vs D Riegler |
| 1-0 | 48 | 2001 | German Championship | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 38. K Schulz vs D Riegler |
| ½-½ | 21 | 2001 | German Championship | A05 Reti Opening |
| 39. D Riegler vs A Bruehl |
| 0-1 | 62 | 2001 | German Championship | D11 Queen's Gambit Declined Slav |
| 40. U Von Herman vs D Riegler |
| 0-1 | 43 | 2001 | German Championship | A57 Benko Gambit |
| 41. D Riegler vs R Dunsbach |
| ½-½ | 20 | 2001 | German Championship | D97 Grunfeld, Russian |
| 42. T Haensel vs D Riegler |
| ½-½ | 15 | 2001 | German Championship | B01 Scandinavian |
| 43. D Riegler vs D Baramidze |
| 0-1 | 47 | 2001 | German Championship | D85 Grunfeld |
| 44. D Riegler vs H Keilhack |
| ½-½ | 14 | 2001 | German Championship | D34 Queen's Gambit Declined, Tarrasch |
| 45. D Riegler vs W Steiger |
| 0-1 | 40 | 2002 | Bad Woerishofen Open | D11 Queen's Gambit Declined Slav |
| 46. P Johansen vs D Riegler |
| ½-½ | 41 | 2002 | Bad Woerishofen Open | B56 Sicilian |
| 47. D Riegler vs F Damm |
| 1-0 | 57 | 2002 | Bad Woerishofen Open | E90 King's Indian |
| 48. D Riegler vs B Vonach |
| 1-0 | 28 | 2002 | Bad Woerishofen Open | D97 Grunfeld, Russian |
| 49. L Maugg vs D Riegler |
| ½-½ | 12 | 2002 | Bad Woerishofen Open | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 50. R Heuer vs D Riegler |
| 0-1 | 37 | 2002 | Bad Woerishofen Open | A48 King's Indian |
Kibitzing
