| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. M Weber vs K Mueller |
| 0-1 | 11 |
1988 |
BL | D02 Queen's Pawn Game |
| 2. Balashov vs K Mueller |
| 1-0 | 68 |
1989 |
Biel | C00 French Defense |
| 3. Shabalov vs K Mueller |
| 0-1 | 49 |
1989 |
Pula 47/519 [Shabalov,A] | D44 Queen's Gambit Declined Semi-Slav |
| 4. K Mueller vs Barsov |
 | 0-1 | 55 |
1989 |
Spring op | C05 French, Tarrasch |
| 5. Hertneck vs K Mueller |
| ½-½ | 52 |
1989 |
Bundesliga 8990 | D44 Queen's Gambit Declined Semi-Slav |
| 6. K Mueller vs Wegner Hannu |
| ½-½ | 28 |
1990 |
Hamburg (Germany) | C44 King's Pawn Game |
| 7. Adorjan vs K Mueller |
| ½-½ | 24 |
1990 |
Balassagyarmat | D45 Queen's Gambit Declined Semi-Slav |
| 8. K Mueller vs Yusupov |
 | 0-1 | 115 |
1991 |
Hamburg SKA | C09 French, Tarrasch, Open Variation, Main line |
| 9. Khalifman vs K Mueller |
| 0-1 | 65 |
1991 |
Hamburg (Germany) | C14 French, Classical |
| 10. Piket vs K Mueller |
| ½-½ | 30 |
1991 |
Hamburg | D21 Queen's Gambit Accepted |
| 11. Hort vs K Mueller |
| ½-½ | 33 |
1992 |
BL 9192 ;BL | D45 Queen's Gambit Declined Semi-Slav |
| 12. K Mueller vs Stohl |
| 1-0 | 41 |
1992 |
Munich op9192 | B86 Sicilian, Fischer-Sozin Attack |
| 13. K Mueller vs Khalifman |
| 0-1 | 58 |
1992 |
GER-CupT f Frankfurt-Hamburg [1] [Ernst,T] | B76 Sicilian, Dragon, Yugoslav Attack |
| 14. K Mueller vs Van Wely |
| 1-0 | 38 |
1992 |
Munich op9192 | B07 Pirc |
| 15. Romanishin vs K Mueller |
 | 1-0 | 31 |
1992 |
Altensteig | C02 French, Advance |
| 16. K Mueller vs Vaganian |
| ½-½ | 22 |
1993 |
BL 9293 ;BL 90 | C09 French, Tarrasch, Open Variation, Main line |
| 17. Christiansen vs K Mueller |
| 1-0 | 60 |
1994 |
BL 9394 ;BL | D31 Queen's Gambit Declined |
| 18. K Mueller vs Hort |
| 0-1 | 31 |
1994 |
GER-CupT | B41 Sicilian, Kan |
| 19. K Mueller vs Christiansen |
| 1-0 | 71 |
1996 |
Bundesliga /97 | B32 Sicilian |
| 20. Vaganian vs K Mueller |
| 0-1 | 72 |
1996 |
Bundesliga 1995/96 | A07 King's Indian Attack |
| 21. Chekhov vs K Mueller |
| ½-½ | 23 |
1996 |
Hamburg HSK | D43 Queen's Gambit Declined Semi-Slav |
| 22. K Bischoff vs K Mueller |
| ½-½ | 43 |
1997 |
GER-ch | D45 Queen's Gambit Declined Semi-Slav |
| 23. H J Oswald vs K Mueller |
| 0-1 | 52 |
1997 |
GER-ch | D02 Queen's Pawn Game |
| 24. K Mueller vs Wahls |
| 0-1 | 53 |
1997 |
GER-ch | B87 Sicilian, Fischer-Sozin with ...a6 and ...b5 |
| 25. K Mueller vs A Hennings |
| ½-½ | 40 |
1997 |
GER-ch | B33 Sicilian |