| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. I Timmermans vs Larsen |
 | 1-0 | 17 |
1996 |
Mondariz op | B35 Sicilian, Accelerated Fianchetto, Modern Variation with Bc4 |
| 2. A Krays vs I Timmermans |
| ½-½ | 21 |
1996 |
Memorial M.Euwe | C50 Giuoco Piano |
| 3. R S Jones vs I Timmermans |
| ½-½ | 34 |
1997 |
NCL967 Celtic Kts-Northumbria | C30 King's Gambit Declined |
| 4. A J Van Haaften vs I Timmermans |
 | 1-0 | 31 |
1997 |
Vlissingen, Netherlands | A00 Uncommon Opening |
| 5. I Timmermans vs W Stange |
| 1-0 | 39 |
2001 |
HZ Open | E76 King's Indian, Four Pawns Attack |
| 6. R Janssen vs I Timmermans |
| 1-0 | 20 |
2001 |
HZ Open | B14 Caro-Kann, Panov-Botvinnik Attack |
| 7. I Timmermans vs Pokorna |
| ½-½ | 38 |
2001 |
HZ Open | C89 Ruy Lopez, Marshall |
| 8. I Timmermans vs J Werle |
| ½-½ | 57 |
2001 |
HZ Open | A22 English |
| 9. J van Zandwijk vs I Timmermans |
 | ½-½ | 17 |
2001 |
HZ Open | C26 Vienna |
| 10. G Baete vs I Timmermans |
 | 0-1 | 26 |
2001 |
HZ Open | D00 Queen's Pawn Game |
| 11. I Timmermans vs R Martyn |
| 0-1 | 32 |
2001 |
Belgian Interteams 2000-1 | B01 Scandinavian |
| 12. P Kalisvaart vs I Timmermans |
| 0-1 | 35 |
2001 |
HZ Open | A45 Queen's Pawn Game |
| 13. I Timmermans vs A Jonkheer |
| 1-0 | 21 |
2001 |
HZ Open | C11 French |
| 14. I Timmermans vs T Waterschoot |
| 1-0 | 40 |
2001 |
Belgian Interteams 2000-1 | B33 Sicilian |
| 15. E Gleizerov vs I Timmermans |
| ½-½ | 27 |
2002 |
32nd Rilton Cup | D43 Queen's Gambit Declined Semi-Slav |
| 16. B Laurent vs I Timmermans |
| ½-½ | 34 |
2002 |
TCh-BEL 2001-2 | C44 King's Pawn Game |
| 17. I Timmermans vs S Ivanov |
| 0-1 | 39 |
2002 |
32nd Rilton Cup | C19 French, Winawer, Advance |
| 18. R Janssen vs I Timmermans |
| 1-0 | 34 |
2003 |
Essent Open | A20 English |
| 19. Gligoric vs I Timmermans |
 | 1-0 | 22 |
2003 |
Rilton Cup 33rd | D48 Queen's Gambit Declined Semi-Slav, Meran |
| 20. Taimanov vs I Timmermans |
| 1-0 | 34 |
2003 |
32nd Rilton Cup | A22 English |
| 21. I Timmermans vs J Moreno Carnero |
| 0-1 | 33 |
2003 |
Monarch Assurance 12th | B96 Sicilian, Najdorf |
| 22. M Berkovich vs I Timmermans |
 | 1-0 | 24 |
2004 |
20th Cappelle la Grande | A20 English |
| 23. I Timmermans vs P Lubson |
| 1-0 | 47 |
2004 |
AS04 Centenary | E99 King's Indian, Orthodox, Taimanov |
| 24. T Hillarp Persson vs I Timmermans |
| 1-0 | 35 |
2008 |
Guernsey Open | D11 Queen's Gambit Declined Slav |
| 25. I Timmermans vs T Spanton |
| 1-0 | 20 |
2008 |
Guernsey Open | C67 Ruy Lopez |