| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. Dlugy vs Mephisto |
| 1-0 | 34 | 1989 | American Open | B10 Caro-Kann |
| 27. Mephisto vs J Peters |
| 1-0 | 82 | 1989 | American Open | A04 Reti Opening |
| 28. Mephisto vs V McCambridge |
| 0-1 | 60 | 1989 | American Open | C03 French, Tarrasch |
| 29. Mephisto vs I Ivanov |
| 1-0 | 42 | 1989 | American Open | A40 Queen's Pawn Game |
| 30. Mephisto vs Deep Thought |
| 1-0 | 64 | 1989 | 20th NACCC | D25 Queen's Gambit Accepted |
| 31. J Polgar vs Mephisto |
 | 0-1 | 51 | 1990 | Amsterdam | B13 Caro-Kann, Exchange |
| 32. M Heidenfeld vs Mephisto |
| ½-½ | 32 | 1990 | Kirchheim rapid | C54 Giuoco Piano |
| 33. Mephisto vs Conchess |
| 1-0 | 44 | 1990 | 8+7 | C55 Two Knights Defense |
| 34. Chesscard vs Mephisto |
| 0-1 | 25 | 1990 | 2+4 | C30 King's Gambit Declined |
| 35. Super Forte vs Mephisto |
| 1-0 | 58 | 1990 | 6+6 | C30 King's Gambit Declined |
| 36. Karpov vs Mephisto |
| 0-1 | 83 | 1990 | /- Munich | D16 Queen's Gambit Declined Slav |
| 37. Mephisto vs S Kindermann |
| 1-0 | 68 | 1990 | Berliner Sommer | E89 King's Indian, Samisch, Orthodox Main line |
| 38. Deep Thought vs Mephisto |
| 1-0 | 60 | 1990 | 21st NACCC | A06 Reti Opening |
| 39. A Goransson vs Mephisto |
| 0-1 | 25 | 1991 | Helsingborg | D24 Queen's Gambit Accepted |
| 40. Mephisto vs O Lundberg |
| ½-½ | 50 | 1991 | Helsingborg | E92 King's Indian |
| 41. Mephisto vs G Meszaros |
| 0-1 | 25 | 1991 | Budapest Spring op | B33 Sicilian |
| 42. L Bergstrom vs Mephisto |
| 0-1 | 30 | 1991 | Helsingborg | A07 King's Indian Attack |
| 43. O Westerlund vs Mephisto |
| 1-0 | 31 | 1991 | Helsingborg | A07 King's Indian Attack |
| 44. Mephisto vs L Jonsson |
| 1-0 | 48 | 1991 | Helsingborg | D30 Queen's Gambit Declined |
| 45. J Eriksson vs Mephisto |
| 1-0 | 29 | 1991 | Helsingborg | A06 Reti Opening |
| 46. Mephisto vs B Westergren |
| 1-0 | 52 | 1991 | Helsingborg | B11 Caro-Kann, Two Knights, 3...Bg4 |
| 47. R Rubinstein vs Mephisto |
| 0-1 | 48 | 1991 | Helsingborg | D20 Queen's Gambit Accepted |
| 48. Mephisto vs J M Dalmau |
| ½-½ | 40 | 1991 | Helsingborg | C64 Ruy Lopez, Classical |
| 49. Mephisto vs S Kring |
| 1-0 | 37 | 1991 | Helsingborg | C42 Petrov Defense |
| 50. T Karlsson vs Mephisto |
| 0-1 | 24 | 1991 | Helsingborg | B13 Caro-Kann, Exchange |
Kibitzing
