| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. E Paoli vs K Langeweg |
| 0-1 | 47 |
1962 |
Reggio Emilia 6263 | B48 Sicilian, Taimanov Variation |
| 2. F Kuijpers vs K Langeweg |
| 1-0 | 57 |
1963 |
IBM | B48 Sicilian, Taimanov Variation |
| 3. Pilnik vs K Langeweg |
| 1-0 | 25 |
1963 |
Hoogovens | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 4. Parma vs K Langeweg |
| 1-0 | 41 |
1963 |
Beverwijk | B46 Sicilian, Taimanov Variation |
| 5. C B Van den Berg vs K Langeweg |
| 1-0 | 23 |
1963 |
Hoogovens | B46 Sicilian, Taimanov Variation |
| 6. Tringov vs K Langeweg |
| ½-½ | 41 |
1964 |
Tel Aviv ol (Men) fin-A | B48 Sicilian, Taimanov Variation |
| 7. F Kuijpers vs K Langeweg |
| 1-0 | 26 |
1967 |
Hoogovens | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 8. Kurajica vs K Langeweg |
| 1-0 | 31 |
1970 |
Wijk aan Zee I | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 9. H Ree vs K Langeweg |
| ½-½ | 33 |
1970 |
Wijk aan Zee I | B48 Sicilian, Taimanov Variation |
| 10. Browne vs K Langeweg |
| ½-½ | 59 |
1971 |
Amsterdam (Netherlands) | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 11. Timman vs K Langeweg |
| 0-1 | 34 |
1971 |
Leeuwarden ch-NED | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 12. C B Van den Berg vs K Langeweg |
| 0-1 | 26 |
1971 |
Wijk aan Zee Hoogovens A, NED | B48 Sicilian, Taimanov Variation |
| 13. Timman vs K Langeweg |
| 1-0 | 43 |
1972 |
Leeuwarden ch-NED | B46 Sicilian, Taimanov Variation |
| 14. Browne vs K Langeweg |
| 1-0 | 35 |
1972 |
Wijk aan Zee I | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 15. B Enklaar vs K Langeweg |
| 1-0 | 38 |
1972 |
Amsterdam IBM | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 16. Browne vs K Langeweg |
| 1-0 | 72 |
1972 |
Amsterdam (Netherlands) | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 17. C Zuidema vs K Langeweg |
| 1-0 | 57 |
1973 |
Wijk aan Zee I | B47 Sicilian, Taimanov (Bastrikov) Variation |
| 18. Browne vs K Langeweg |
 | 1-0 | 19 |
1974 |
Wijk aan Zee (Netherlands) | B46 Sicilian, Taimanov Variation |
| 19. Kupreichik vs K Langeweg |
 | 1-0 | 39 |
1975 |
Dortmund | B46 Sicilian, Taimanov Variation |
| 20. Browne vs K Langeweg |
| ½-½ | 73 |
1975 |
It (a) | B46 Sicilian, Taimanov Variation |
| 21. Timman vs K Langeweg |
| 1-0 | 41 |
1975 |
1, Wijk Aan Zee | B46 Sicilian, Taimanov Variation |
| 22. Sax vs K Langeweg |
 | 1-0 | 41 |
1976 |
Amsterdam IBM I | B46 Sicilian, Taimanov Variation |
| 23. F Olafsson vs K Langeweg |
| 0-1 | 40 |
1976 |
Amsterdam IBM I | B46 Sicilian, Taimanov Variation |
| 24. R Kuijf vs K Langeweg |
| ½-½ | 40 |
1981 |
NED-ch | B46 Sicilian, Taimanov Variation |
| 25. Sznapik vs K Langeweg |
| ½-½ | 42 |
1981 |
Dortmund GER | B46 Sicilian, Taimanov Variation |