| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 26. Schmaltz vs K Mueller |
| 0-1 | 45 |
1997 |
GER-ch | C00 French Defense |
| 27. L Gutman vs K Mueller |
| 0-1 | 50 |
1997 |
GER-ch | D44 Queen's Gambit Declined Semi-Slav |
| 28. K Mueller vs E Gisbrecht |
| 1-0 | 55 |
1997 |
GER-ch | B29 Sicilian, Nimzovich-Rubinstein |
| 29. K Bischoff vs K Mueller |
| ½-½ | 43 |
1997 |
GER-ch | D45 Queen's Gambit Declined Semi-Slav |
| 30. H J Oswald vs K Mueller |
| 0-1 | 52 |
1997 |
GER-ch | D02 Queen's Pawn Game |
| 31. R Knaak vs K Mueller |
| 1-0 | 40 |
1998 |
Bundesliga -9 | D44 Queen's Gambit Declined Semi-Slav |
| 32. Y Pelletier vs K Mueller |
| 1-0 | 31 |
1998 |
Bundesliga -9 | D47 Queen's Gambit Declined Semi-Slav |
| 33. Ashley vs K Mueller |
| ½-½ | 53 |
1998 |
Match, Bermuda | C16 French, Winawer |
| 34. P Wells vs K Mueller |
| ½-½ | 50 |
1998 |
Bundesliga -9 | D47 Queen's Gambit Declined Semi-Slav |
| 35. K Mueller vs P Enders |
| ½-½ | 26 |
1998 |
Bundesliga -9 | B89 Sicilian |
| 36. K Mueller vs S Agdestein |
| 0-1 | 54 |
1998 |
Bundesliga -9 | B13 Caro-Kann, Exchange |
| 37. K Mueller vs A Ziegler |
| 1-0 | 41 |
1998 |
Bundesliga 9899 | B32 Sicilian |
| 38. K Mueller vs A Sokolov |
| ½-½ | 22 |
1998 |
Bundesliga -9 | B04 Alekhine's Defense, Modern |
| 39. K Mueller vs Uhlmann |
| 1-0 | 59 |
1999 |
Bundesliga 1998/99, Germany | C01 French, Exchange |
| 40. K Mueller vs M Thesing |
| ½-½ | 84 |
1999 |
Bundesliga 1998/99, Germany | C07 French, Tarrasch |
| 41. Keitlinghaus vs K Mueller |
| ½-½ | 20 |
1999 |
Bundesliga 1998/99, Germany | B01 Scandinavian |
| 42. K Mueller vs D King |
| ½-½ | 54 |
1999 |
Bundesliga 1998/99, Germany | B90 Sicilian, Najdorf |
| 43. A Ziegler vs K Mueller |
| 1-0 | 56 |
1999 |
Bundesliga 9900 | D15 Queen's Gambit Declined Slav |
| 44. Huebner vs K Mueller |
| ½-½ | 45 |
1999 |
Bundesliga 1998/99, Germany | D47 Queen's Gambit Declined Semi-Slav |
| 45. A Naumann vs K Mueller |
 | 0-1 | 47 |
1999 |
Bundesliga 1998-9 | D44 Queen's Gambit Declined Semi-Slav |
| 46. Smejkal vs K Mueller |
| ½-½ | 30 |
1999 |
Bundesliga 9900 | B10 Caro-Kann |
| 47. S Berndt vs K Mueller |
| ½-½ | 41 |
1999 |
Bundesliga 1998/99, Germany | B01 Scandinavian |
| 48. ConNers vs K Mueller |
| ½-½ | 52 |
1999 |
Lippstadt GER | B01 Scandinavian |
| 49. K Mueller vs A Ziegler |
| 1-0 | 41 |
1999 |
Bundesliga 1998/99, Germany | B33 Sicilian |
| 50. K Mueller vs Yusupov |
| ½-½ | 43 |
1999 |
GER-ch 71st | C14 French, Classical |