| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. Keene vs G K Sandiford |
 | 1-0 | 36 |
1962 |
Match | E24 Nimzo-Indian, Samisch |
| 2. Keene vs A C Hurren |
 | 1-0 | 33 |
1962 |
Surrey-Lincolnshire county match | E26 Nimzo-Indian, Samisch |
| 3. Keene vs H T Jones |
 | 1-0 | 34 |
1964 |
Dulwich College Absolute Ch | E25 Nimzo-Indian, Samisch |
| 4. Keene vs J N Sugden |
| ½-½ | 44 |
1964 |
Dulwich College Champs | E25 Nimzo-Indian, Samisch |
| 5. Keene vs G H Morley |
 | 1-0 | 46 |
1964 |
UK Schools Championship | E30 Nimzo-Indian, Leningrad |
| 6. Keene vs D Gilbertson |
 | 1-0 | 30 |
1964 |
London League | E51 Nimzo-Indian, 4.e3 |
| 7. Keene vs P R Morriss |
  | 1-0 | 40 |
1964 |
En Passant Club Tourney | E30 Nimzo-Indian, Leningrad |
| 8. Keene vs A J Sobey |
| 1-0 | 30 |
1965 |
Surrey Trophy Final | E30 Nimzo-Indian, Leningrad |
| 9. Keene vs O'Kelly |
 | 0-1 | 37 |
1965 |
Tournament | E30 Nimzo-Indian, Leningrad |
| 10. Keene vs R C Gittins |
 | 1-0 | 38 |
1965 |
Final, Kent League | E30 Nimzo-Indian, Leningrad |
| 11. Keene vs H Broman |
  | 1-0 | 56 |
1965 |
World Junior Championship | E30 Nimzo-Indian, Leningrad |
| 12. Keene vs J Cordovil |
 | 0-1 | 38 |
1965 |
World Junior Championship | E30 Nimzo-Indian, Leningrad |
| 13. Keene vs K Lloyd |
| ½-½ | 37 |
1965 |
Ilford | E30 Nimzo-Indian, Leningrad |
| 14. Keene vs R A Fertoszegi |
  | 1-0 | 39 |
1965 |
London Clubs | E30 Nimzo-Indian, Leningrad |
| 15. Keene vs P Svedenborg |
 | 1-0 | 43 |
1965 |
Int. junior team tourney, The Hague | E30 Nimzo-Indian, Leningrad |
| 16. Keene vs M Rantanen |
  | 1-0 | 42 |
1966 |
British Chess Federation v Finland | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 17. Keene vs H Ree |
  | ½-½ | 40 |
1966 |
Anglo-Dutch Match | E52 Nimzo-Indian, 4.e3, Main line with ...b6 |
| 18. Keene vs Smith |
| 1-0 | 38 |
1966 |
U.K. Schools Championsihp | E30 Nimzo-Indian, Leningrad |
| 19. Keene vs J F Parnell |
| 1-0 | 24 |
1967 |
Nat Club Camb U - Saffron Walden | E55 Nimzo-Indian, 4.e3, Gligoric System, Bronstein Variation |
| 20. Keene vs G Brostrom |
| 1-0 | 33 |
1967 |
World Student Team Champs | E41 Nimzo-Indian |
| 21. Keene vs A Moyle |
 | 1-0 | 43 |
1968 |
National Club Championship | E51 Nimzo-Indian, 4.e3 |
| 22. Keene vs Ulf Andersson |
| ½-½ | 19 |
1972 |
Reykjavik | E46 Nimzo-Indian |
| 23. Keene vs S Kerr |
  | 1-0 | 22 |
1979 |
Sydney | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 24. Keene vs B Toth |
  | 1-0 | 41 |
1979 |
Rome (Italy) | E49 Nimzo-Indian, 4.e3, Botvinnik System |
| 25. Keene vs Purdy |
  | 1-0 | 31 |
1979 |
Sydney | E49 Nimzo-Indian, 4.e3, Botvinnik System |