| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. N Huschenbeth vs O Mueller |
| ½-½ | 67 | 2011 | German Championship | B65 Sicilian, Richter-Rauzer Attack, 7...Be7 Defense, 9...Nxd4 |
| 27. O Mueller vs Buhmann |
| ½-½ | 31 | 2011 | German Championship | C11 French |
| 28. T Jugelt vs O Mueller |
| ½-½ | 45 | 2011 | German Championship | E11 Bogo-Indian Defense |
| 29. G Andre vs O Mueller |
| 1-0 | 27 | 2011 | German Championship | E11 Bogo-Indian Defense |
| 30. O Mueller vs H Mertens |
| ½-½ | 17 | 2011 | German Championship | B07 Pirc |
| 31. O Mueller vs F Bracker |
| ½-½ | 48 | 2011 | German Championship | D76 Neo-Grunfeld, 6.cd Nxd5, 7.O-O Nb6 |
| 32. N Lubbe vs O Mueller |
| ½-½ | 45 | 2011 | German Championship | B42 Sicilian, Kan |
| 33. R Seger vs O Mueller |
| 0-1 | 35 | 2011 | German Championship | B22 Sicilian, Alapin |
| 34. O Mueller vs C Seel |
| 0-1 | 53 | 2011 | German Championship | A00 Uncommon Opening |
| 35. O Mueller vs M Nikolov |
| ½-½ | 54 | 2012 | Istanbul Olympiad | A70 Benoni, Classical with 7.Nf3 |
| 36. D Warner vs O Mueller |
| 1-0 | 81 | 2012 | Istanbul Olympiad | E11 Bogo-Indian Defense |
| 37. A Watanabe vs O Mueller |
| 0-1 | 66 | 2012 | Istanbul Olympiad | E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 |
| 38. O Mueller vs M Steadman |
| 1-0 | 55 | 2012 | Istanbul Olympiad | A84 Dutch |
| 39. O Mueller vs G Wall |
| 1-0 | 40 | 2012 | Istanbul Olympiad | A81 Dutch |
| 40. Y Bacallao Alonso vs O Mueller |
| 1-0 | 33 | 2012 | Istanbul Olympiad | B30 Sicilian |
| 41. P R Martinez Reyes vs O Mueller |
| 0-1 | 30 | 2012 | Istanbul Olympiad | B30 Sicilian |
| 42. O Mueller vs H Nezad |
| ½-½ | 78 | 2012 | Istanbul Olympiad | D48 Queen's Gambit Declined Semi-Slav, Meran |
| 43. A Zaibi vs O Mueller |
| 0-1 | 72 | 2012 | Istanbul Olympiad | B31 Sicilian, Rossolimo Variation |
| 44. O Mueller vs T Kahlert |
| 0-1 | 33 | 2012 | Bundesliga 2012/13 | D90 Grunfeld |
| 45. M van Delft vs O Mueller |
| 1-0 | 58 | 2012 | Bundesliga 2012/13 | B32 Sicilian |
| 46. O Mueller vs Jose Rita |
| 1-0 | 32 | 2014 | Tromso Olympiad | D50 Queen's Gambit Declined |
| 47. O Mueller vs K Shanava |
| 0-1 | 32 | 2014 | Tromso Olympiad | A40 Queen's Pawn Game |
| 48. M Younus vs O Mueller |
| 1-0 | 24 | 2014 | Tromso Olympiad | E32 Nimzo-Indian, Classical |
| 49. O Mueller vs H Asabri |
| ½-½ | 54 | 2014 | Tromso Olympiad | A58 Benko Gambit |
| 50. T Thorhallsson vs O Mueller |
| 1-0 | 45 | 2014 | Tromso Olympiad | B40 Sicilian |
Kibitzing
