| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. R Mueller vs M Heika |
| ½-½ | 50 | 2011 | GER CupT | D58 Queen's Gambit Declined, Tartakower (Makagonov-Bondarevsky) Syst |
| 27. R Mueller vs T Gharamian |
| ½-½ | 28 | 2012 | Cappelle Open | A04 Reti Opening |
| 28. J Ortega Ruiz vs R Mueller |
| 1-0 | 80 | 2012 | Cappelle Open | D83 Grunfeld, Grunfeld Gambit |
| 29. A Mevel vs R Mueller |
| 0-1 | 29 | 2013 | Cappelle Open | C56 Two Knights |
| 30. R Mueller vs G N Gopal |
| 1-0 | 45 | 2013 | Cappelle Open | D30 Queen's Gambit Declined |
| 31. S Ter-Sahakyan vs R Mueller |
| 1-0 | 29 | 2013 | Cappelle Open | C65 Ruy Lopez, Berlin Defense |
| 32. R Mueller vs Iturrizaga Bonelli |
| 0-1 | 37 | 2013 | Cappelle Open | E60 King's Indian Defense |
| 33. D Kerigan vs R Mueller |
 | 1-0 | 37 | 2013 | Cappelle Open | C45 Scotch Game |
| 34. R Mueller vs F Duprey |
| 1-0 | 7 | 2013 | Cappelle Open | E90 King's Indian |
| 35. E Mattheys vs R Mueller |
| 0-1 | 33 | 2013 | Cappelle Open | D86 Grunfeld, Exchange |
| 36. A Zubarev vs R Mueller |
| 1-0 | 42 | 2016 | 28th Staufer-Open | E80 King's Indian, Samisch Variation |
| 37. R Mueller vs M Dann |
| 0-1 | 44 | 2017 | GRENKE Chess Open | E15 Queen's Indian |
| 38. R Mueller vs P Potapov |
| 0-1 | 22 | 2017 | 28th Czech Open A | A04 Reti Opening |
| 39. A Mittal vs R Mueller |
| 1-0 | 32 | 2017 | 28th Czech Open A | D85 Grunfeld |
| 40. M Vystrcil vs R Mueller |
| 0-1 | 51 | 2018 | Pardubice Open-A | B03 Alekhine's Defense |
| 41. R Mueller vs R Praggnanandhaa |
| 0-1 | 68 | 2018 | Pardubice Open-A | D02 Queen's Pawn Game |
| 42. J Soural vs R Mueller |
| ½-½ | 38 | 2018 | Pardubice Open-A | D85 Grunfeld |
| 43. R Mueller vs L Stetsko |
| ½-½ | 50 | 2018 | Pardubice Open-A | E06 Catalan, Closed, 5.Nf3 |
| 44. A Roienko vs R Mueller |
| 0-1 | 82 | 2018 | Pardubice Open-A | D87 Grunfeld, Exchange |
| 45. R Mueller vs V Babula Sr |
| ½-½ | 31 | 2018 | Pardubice Open-A | E15 Queen's Indian |
| 46. P Haba vs R Mueller |
| ½-½ | 34 | 2018 | Pardubice Open-A | D85 Grunfeld |
| 47. R Mueller vs R Biolek Jr |
| ½-½ | 16 | 2018 | Pardubice Open-A | E06 Catalan, Closed, 5.Nf3 |
| 48. P Nutakki vs R Mueller |
| 1-0 | 29 | 2018 | Pardubice Open-A | B02 Alekhine's Defense |
| 49. R Mueller vs E Vorobiov |
| ½-½ | 29 | 2019 | 30th Czech Open A | E60 King's Indian Defense |
| 50. R Mueller vs E Smirnova |
| ½-½ | 36 | 2019 | 30th Czech Open A | D12 Queen's Gambit Declined Slav |
Kibitzing
