| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Minev vs K Langeweg |
| 1-0 | 25 |
1960 |
Leipzig ol (Men) fin-A | E43 Nimzo-Indian, Fischer Variation |
| 2. A Zaitsev vs K Langeweg |
| 0-1 | 34 |
1967 |
Memorial M.Chigorin | E21 Nimzo-Indian, Three Knights |
| 3. Portisch vs K Langeweg |
| 1-0 | 45 |
1968 |
Wijk aan Zee | E53 Nimzo-Indian, 4.e3 |
| 4. H Ree vs K Langeweg |
| 0-1 | 29 |
1969 |
Wijk aan Zee I | E21 Nimzo-Indian, Three Knights |
| 5. Portisch vs K Langeweg |
| 1-0 | 24 |
1969 |
Amsterdam | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 6. F Kuijpers vs K Langeweg |
| ½-½ | 14 |
1970 |
Hoogovens | E58 Nimzo-Indian, 4.e3, Main line with 8...Bxc3 |
| 7. Gligoric vs K Langeweg |
| ½-½ | 22 |
1971 |
Wijk aan Zee Hoogovens A, NED | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 8. J H Donner vs K Langeweg |
| 0-1 | 44 |
1971 |
Wijk aan Zee Hoogovens A, NED | E41 Nimzo-Indian |
| 9. Mecking vs K Langeweg |
| ½-½ | 20 |
1971 |
Wijk aan Zee Hoogovens A, NED | E41 Nimzo-Indian |
| 10. J H Donner vs K Langeweg |
| 0-1 | 42 |
1972 |
Amsterdam IBM | E58 Nimzo-Indian, 4.e3, Main line with 8...Bxc3 |
| 11. Timman vs K Langeweg |
| ½-½ | 47 |
1972 |
7, Wijk Aan Zee | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 12. J H Donner vs K Langeweg |
| ½-½ | 41 |
1972 |
Wijk aan Zee I | E41 Nimzo-Indian |
| 13. A Pomar-Salamanca vs K Langeweg |
| 1-0 | 22 |
1972 |
Wijk aan Zee I | E47 Nimzo-Indian, 4.e3 O-O 5.Bd3 |
| 14. Balashov vs K Langeweg |
| 1-0 | 41 |
1973 |
Wijk aan Zee | E54 Nimzo-Indian, 4.e3, Gligoric System |
| 15. Gligoric vs K Langeweg |
| ½-½ | 104 |
1975 |
Hoogovens | E47 Nimzo-Indian, 4.e3 O-O 5.Bd3 |
| 16. Szabo vs K Langeweg |
| 0-1 | 38 |
1976 |
Amsterdam IBM | E46 Nimzo-Indian |
| 17. Keene vs K Langeweg |
 | 1-0 | 24 |
1980 |
Rotterdam | E47 Nimzo-Indian, 4.e3 O-O 5.Bd3 |
| 18. J H Donner vs K Langeweg |
| ½-½ | 34 |
1981 |
NED-ch | E41 Nimzo-Indian |
| 19. Hort vs K Langeweg |
| 1-0 | 33 |
1982 |
Amsterdam OHRA | E46 Nimzo-Indian |
| 20. Glek vs K Langeweg |
| 1-0 | 30 |
1990 |
Kusadasi 49/654 | E32 Nimzo-Indian, Classical |