| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Parma vs K Langeweg |
| 1-0 | 41 |
1963 |
Beverwijk | B46 Sicilian, Taimanov Variation |
| 2. C B Van den Berg vs K Langeweg |
| 1-0 | 23 |
1963 |
Hoogovens | B46 Sicilian, Taimanov Variation |
| 3. Timman vs K Langeweg |
| 1-0 | 43 |
1972 |
Leeuwarden ch-NED | B46 Sicilian, Taimanov Variation |
| 4. Browne vs K Langeweg |
 | 1-0 | 19 |
1974 |
Wijk aan Zee (Netherlands) | B46 Sicilian, Taimanov Variation |
| 5. Kupreichik vs K Langeweg |
 | 1-0 | 39 |
1975 |
Dortmund | B46 Sicilian, Taimanov Variation |
| 6. Timman vs K Langeweg |
| 1-0 | 41 |
1975 |
1, Wijk Aan Zee | B46 Sicilian, Taimanov Variation |
| 7. Browne vs K Langeweg |
| ½-½ | 73 |
1975 |
It (a) | B46 Sicilian, Taimanov Variation |
| 8. F Olafsson vs K Langeweg |
| 0-1 | 40 |
1976 |
Amsterdam IBM I | B46 Sicilian, Taimanov Variation |
| 9. Sax vs K Langeweg |
 | 1-0 | 41 |
1976 |
Amsterdam IBM I | B46 Sicilian, Taimanov Variation |
| 10. G Ligterink vs K Langeweg |
| ½-½ | 24 |
1981 |
NED-ch | B46 Sicilian, Taimanov Variation |
| 11. R Kuijf vs K Langeweg |
| ½-½ | 40 |
1981 |
NED-ch | B46 Sicilian, Taimanov Variation |
| 12. Timman vs K Langeweg |
| 1-0 | 42 |
1981 |
04 | B46 Sicilian, Taimanov Variation |
| 13. Sznapik vs K Langeweg |
| ½-½ | 42 |
1981 |
Dortmund GER | B46 Sicilian, Taimanov Variation |
| 14. Van der Wiel vs K Langeweg |
| 1-0 | 27 |
1982 |
Nederland (ch) 33/256 | B46 Sicilian, Taimanov Variation |
| 15. Nunn vs K Langeweg |
| ½-½ | 40 |
1982 |
Marbella | B46 Sicilian, Taimanov Variation |