| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. G Beikert vs G Spiess |
| 1-0 | 28 | 1990 | Kirchheim rapid | A01 Nimzovich-Larsen Attack |
| 2. G Spiess vs C Gabriel |
| 0-1 | 32 | 1992 | GER CupT | D35 Queen's Gambit Declined |
| 3. A Wojtkiewicz vs G Spiess |
| 1-0 | 21 | 1995 | Travemuende op | A13 English |
| 4. G Spiess vs M Womacka |
| ½-½ | 19 | 1995 | BL2-O 9596 | A71 Benoni, Classical, 8.Bg5 |
| 5. M Womacka vs G Spiess |
| 1-0 | 26 | 1996 | BL2-O 9697 | C01 French, Exchange |
| 6. M Kapp vs G Spiess |
| 0-1 | 16 | 1998 | Chemnitz Open | A41 Queen's Pawn Game (with ...d6) |
| 7. G Spiess vs S Ranft |
| 1-0 | 28 | 1998 | Chemnitz Open | E60 King's Indian Defense |
| 8. D Wiegner vs G Spiess |
| 0-1 | 35 | 1998 | Chemnitz Open | C16 French, Winawer |
| 9. G Spiess vs L Vogt |
| 0-1 | 48 | 1998 | Chemnitz Open | E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 |
| 10. A Pfeiffer vs G Spiess |
| 0-1 | 29 | 1998 | Chemnitz Open | C01 French, Exchange |
| 11. G Spiess vs H Jonkman |
| ½-½ | 21 | 1998 | Chemnitz Open | D02 Queen's Pawn Game |
| 12. M Womacka vs G Spiess |
| ½-½ | 32 | 1998 | Chemnitz Open | C07 French, Tarrasch |
| 13. G Spiess vs P Haba |
| 0-1 | 51 | 1998 | Chemnitz Open | A43 Old Benoni |
| 14. V Medunova vs G Spiess |
| ½-½ | 22 | 1998 | Chemnitz Open | C01 French, Exchange |
| 15. M Womacka vs G Spiess |
| 1-0 | 38 | 1998 | BL2-O 9899 | C09 French, Tarrasch, Open Variation, Main line |
| 16. G Spiess vs G Ginsburg |
| ½-½ | 35 | 2000 | BL2-Ost 0001 | A49 King's Indian, Fianchetto without c4 |
| 17. M Prusikin vs G Spiess |
| 1-0 | 29 | 2000 | BL2-Ost 0001 | A41 Queen's Pawn Game (with ...d6) |
| 18. Uhlmann vs G Spiess |
| ½-½ | 26 | 2001 | BL2-Ost 0001 | A41 Queen's Pawn Game (with ...d6) |
| 19. S Petrosian vs G Spiess |
| 0-1 | 46 | 2001 | BL2-Ost 0001 | C09 French, Tarrasch, Open Variation, Main line |
| 20. F Stauch vs G Spiess |
| 0-1 | 45 | 2001 | Bayern-chI Bank Hofmann 5th | D02 Queen's Pawn Game |
| 21. G Spiess vs T Lochte |
| 1-0 | 33 | 2001 | Bayern-chI Bank Hofmann 5th | E60 King's Indian Defense |
| 22. J Just vs G Spiess |
| ½-½ | 40 | 2001 | Bayern-chI Bank Hofmann 5th | A31 English, Symmetrical, Benoni Formation |
| 23. G Spiess vs A Kaminik |
| 1-0 | 47 | 2001 | Bayern-chI Bank Hofmann 5th | E82 King's Indian, Samisch, double Fianchetto Variation |
| 24. Dorfman vs G Spiess |
| 1-0 | 41 | 2001 | Bayern-chI Bank Hofmann 5th | D36 Queen's Gambit Declined, Exchange, Positional line, 6.Qc2 |
| 25. G Spiess vs L Zier |
| ½-½ | 25 | 2001 | Bayern-chI Bank Hofmann 5th | D30 Queen's Gambit Declined |
Kibitzing
