| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. Brucher vs Mephisto |
| 0-1 | 49 | 1983 | Biel Open | C34 King's Gambit Accepted |
| 2. Karpov vs Mephisto |
 | ½-½ | 25 | 1983 | Simul, 21b | C67 Ruy Lopez |
| 3. W Taeger vs Mephisto |
| 1-0 | 25 | 1984 | Berliner Sommer | A00 Uncommon Opening |
| 4. D K Johansen vs Mephisto |
| 1-0 | 28 | 1984 | Hanover Open | C17 French, Winawer, Advance |
| 5. Kasparov vs Mephisto |
 | 1-0 | 21 | 1985 | Kasparov Computer Simul 32b, Hamburg | A07 King's Indian Attack |
| 6. Kasparov vs Mephisto |
| 1-0 | 43 | 1985 | Kasparov Computer Simul 32b, Hamburg | E01 Catalan, Closed |
| 7. Kasparov vs Mephisto |
| 1-0 | 41 | 1985 | Kasparov Computer Simul 32b, Hamburg | D11 Queen's Gambit Declined Slav |
| 8. Kasparov vs Mephisto |
| 1-0 | 55 | 1985 | Kasparov Computer Simul 32b, Hamburg | C97 Ruy Lopez, Closed, Chigorin |
| 9. Kasparov vs Mephisto |
| 1-0 | 41 | 1985 | Kasparov Computer Simul 32b, Hamburg | C72 Ruy Lopez, Modern Steinitz Defense, 5.O-O |
| 10. Kasparov vs Mephisto |
| 1-0 | 42 | 1985 | Kasparov Computer Simul 32b, Hamburg | B90 Sicilian, Najdorf |
| 11. Kasparov vs Mephisto |
| 1-0 | 43 | 1985 | Kasparov Computer Simul 32b, Hamburg | B14 Caro-Kann, Panov-Botvinnik Attack |
| 12. Kasparov vs Mephisto |
| 1-0 | 33 | 1985 | Kasparov Computer Simul 32b, Hamburg | B05 Alekhine's Defense, Modern |
| 13. Kasparov vs Mephisto |
| 1-0 | 36 | 1985 | Blindfold simul, 10b | C97 Ruy Lopez, Closed, Chigorin |
| 14. Mephisto vs K Spraggett |
| 0-1 | 38 | 1986 | Vienna op2 | B40 Sicilian |
| 15. Benjamin vs Mephisto |
| 1-0 | 37 | 1987 | Simul, 31b | D99 Grunfeld Defense, Smyslov |
| 16. Mephisto vs A Bachmann |
| 1-0 | 11 | 1988 | Berlin | D93 Grunfeld, with Bf4 & e3 |
| 17. J Hanken vs Mephisto |
| 0-1 | 16 | 1988 | 16th World Open | A20 English |
| 18. Mephisto vs Deep Thought |
| 0-1 | 73 | 1988 | Orlando ACM | A21 English |
| 19. Mephisto vs M Hampl |
| 0-1 | 37 | 1989 | 12th Waitakere Trust Open | E32 Nimzo-Indian, Classical |
| 20. Mephisto vs O Sarapu |
| 1-0 | 12 | 1989 | Computer Game | C24 Bishop's Opening |
| 21. Mephisto vs J Peters |
| 1-0 | 82 | 1989 | American Open | A04 Reti Opening |
| 22. Mephisto vs I Barlay |
| 1-0 | 61 | 1989 | American Open | A90 Dutch |
| 23. Dlugy vs Mephisto |
| 1-0 | 34 | 1989 | American Open | B10 Caro-Kann |
| 24. Mephisto vs M Ginsburg |
| ½-½ | 60 | 1989 | American Open | A54 Old Indian, Ukrainian Variation, 4.Nf3 |
| 25. Mephisto vs V McCambridge |
| 0-1 | 60 | 1989 | American Open | C03 French, Tarrasch |
Kibitzing
