| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. D E Rumens vs G Dickson |
| 0-1 | 25 | 1958 | British Championship | A03 Bird's Opening |
| 2. D E Rumens vs D Mabbs |
 | 1-0 | 36 | 1958 | London Boys' Championship 1957/58 | B83 Sicilian |
| 3. D E Rumens vs J Stefanov |
| 1-0 | 55 | 1959 | World Junior Championship qual-3 | B77 Sicilian, Dragon, Yugoslav Attack |
| 4. P Hohler vs D E Rumens |
| 1-0 | 35 | 1959 | World Junior Championship qual-3 | C86 Ruy Lopez, Worrall Attack |
| 5. D E Rumens vs G Tcherniak |
| 1-0 | 26 | 1959 | World Junior Championship qual-3 | C89 Ruy Lopez, Marshall |
| 6. I Saren vs D E Rumens |
| 1-0 | 44 | 1959 | World Junior Championship qual-3 | C89 Ruy Lopez, Marshall |
| 7. D E Rumens vs R Hoen |
| 1-0 | 44 | 1959 | World Junior Championship qual-3 | C18 French, Winawer |
| 8. R Naranja vs D E Rumens |
| 1-0 | 38 | 1959 | World Junior Championship qual-3 | A85 Dutch, with c4 & Nc3 |
| 9. D E Rumens vs E Velasco |
| ½-½ | 29 | 1959 | World Junior Championship qual-3 | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 10. C Bielicki vs D E Rumens |
| ½-½ | 39 | 1959 | World Junior Championship qual-3 | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 11. D E Rumens vs F Kuijpers |
| 1-0 | 31 | 1959 | World Junior Championship Final-A | C81 Ruy Lopez, Open, Howell Attack |
| 12. J Stefanov vs D E Rumens |
| 1-0 | 43 | 1959 | World Junior Championship Final-A | A97 Dutch, Ilyin-Genevsky |
| 13. D E Rumens vs Parma |
| ½-½ | 50 | 1959 | World Junior Championship Final-A | B74 Sicilian, Dragon, Classical |
| 14. D E Rumens vs W Erny |
| 1-0 | 24 | 1959 | World Junior Championship Final-A | C86 Ruy Lopez, Worrall Attack |
| 15. U Kuettner vs D E Rumens |
| 0-1 | 26 | 1959 | World Junior Championship Final-A | E56 Nimzo-Indian, 4.e3, Main line with 7...Nc6 |
| 16. D E Rumens vs C Clemens |
| ½-½ | 27 | 1959 | World Junior Championship Final-A | B92 Sicilian, Najdorf, Opocensky Variation |
| 17. A Tomson vs D E Rumens |
| 0-1 | 21 | 1959 | World Junior Championship Final-A | C31 King's Gambit Declined, Falkbeer Counter Gambit |
| 18. D E Rumens vs J R Phillips |
| ½-½ | 34 | 1959 | World Junior Championship Final-A | A02 Bird's Opening |
| 19. S Hamann vs D E Rumens |
| ½-½ | 40 | 1959 | World Junior Championship Final-A | E19 Queen's Indian, Old Main line, 9.Qxc3 |
| 20. D E Rumens vs R Naranja |
| ½-½ | 49 | 1959 | World Junior Championship Final-A | A02 Bird's Opening |
| 21. C Bielicki vs D E Rumens |
| 1-0 | 35 | 1959 | World Junior Championship Final-A | A04 Reti Opening |
| 22. Tal vs D E Rumens |
| ½-½ | 10 | 1964 | Tal Simul, 24b London | E14 Queen's Indian |
| 23. D E Rumens vs D J Sherman |
| 0-1 | 32 | 1972 | Islington Open | B00 Uncommon King's Pawn Opening |
| 24. C W Kennaugh vs D E Rumens |
| ½-½ | 55 | 1972 | Islington Open | C32 King's Gambit Declined, Falkbeer Counter Gambit |
| 25. Le Blanchy vs D E Rumens |
| 0-1 | 15 | 1975 | Borehamwood, England | C57 Two Knights |
Kibitzing
