| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. M Duppel vs K Novacek |
| 1-0 | 45 | 1999 | Staufer Open | E91 King's Indian |
| 27. M Duppel vs V Lederle |
| 0-1 | 52 | 1999 | Staufer Open | B08 Pirc, Classical |
| 28. M Duppel vs H Kowalski |
| 1-0 | 29 | 1999 | Staufer Open | A00 Uncommon Opening |
| 29. M Duppel vs O Sick |
| 0-1 | 40 | 1999 | BL2-S 9899 | B50 Sicilian |
| 30. I Farago vs M Duppel |
| 1-0 | 54 | 1999 | Neckar op 3rd | D11 Queen's Gambit Declined Slav |
| 31. M Duppel vs R Schlindwein |
 | 0-1 | 65 | 1999 | BL2-Sued 9900 | A04 Reti Opening |
| 32. P Haba vs M Duppel |
| ½-½ | 42 | 1999 | Boeblingen op | D43 Queen's Gambit Declined Semi-Slav |
| 33. M Duppel vs I Farago |
| ½-½ | 16 | 1999 | Boeblingen op | E32 Nimzo-Indian, Classical |
| 34. M Duppel vs J Horvath |
| 1-0 | 31 | 1999 | Boeblingen op | E32 Nimzo-Indian, Classical |
| 35. M Duppel vs W Weiler |
| 1-0 | 10 | 2000 | Staufer Open | B07 Pirc |
| 36. M Duppel vs J Gabriel |
| 1-0 | 37 | 2000 | Staufer Open | A87 Dutch, Leningrad, Main Variation |
| 37. M Duppel vs V Kiefhaber |
| 1-0 | 39 | 2000 | Staufer Open | B08 Pirc, Classical |
| 38. I Delemarre vs M Duppel |
| ½-½ | 30 | 2000 | Staufer Open | B22 Sicilian, Alapin |
| 39. T Hedler vs M Duppel |
| 0-1 | 21 | 2000 | Staufer Open | A00 Uncommon Opening |
| 40. J Gheng vs M Duppel |
| 1-0 | 21 | 2000 | Staufer Open | B83 Sicilian |
| 41. M Duppel vs O Sick |
| 1-0 | 38 | 2000 | BL2-Sued 9900 | A81 Dutch |
| 42. A Praznik vs M Duppel |
| 0-1 | 42 | 2000 | Komercni Banka Open | C02 French, Advance |
| 43. M Duppel vs T Fogarasi |
| ½-½ | 16 | 2000 | Komercni Banka Open | B40 Sicilian |
| 44. M Duppel vs J Votava |
| 1-0 | 56 | 2000 | Komercni Banka Open | A34 English, Symmetrical |
| 45. V Neverov vs M Duppel |
| ½-½ | 69 | 2000 | Komercni Banka Open | D49 Queen's Gambit Declined Semi-Slav, Meran |
| 46. M Duppel vs E Meduna |
| ½-½ | 42 | 2000 | Komercni Banka Open | D18 Queen's Gambit Declined Slav, Dutch |
| 47. P Haba vs M Duppel |
| ½-½ | 25 | 2000 | Komercni Banka Open | D43 Queen's Gambit Declined Semi-Slav |
| 48. Navara vs M Duppel |
| ½-½ | 66 | 2000 | Komercni Banka Open | C03 French, Tarrasch |
| 49. M Duppel vs M Konopka |
| 0-1 | 30 | 2000 | Komercni Banka Open | D70 Neo-Grunfeld Defense |
| 50. C Hansen vs M Duppel |
| 1-0 | 40 | 2000 | Bundesliga 2000/01 | A30 English, Symmetrical |
Kibitzing
