| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. L Roos vs Van der Sterren |
| 0-1 | 71 | 1975 | European Junior Championship Preliminary | C01 French, Exchange |
| 2. H Schussler vs L Roos |
| ½-½ | 46 | 1975 | European Junior Championship Preliminary | C05 French, Tarrasch |
| 3. O Foisor vs L Roos |
| 1-0 | 32 | 1975 | European Junior Championship Preliminary | A96 Dutch, Classical Variation |
| 4. L Roos vs A Duer |
| 0-1 | 34 | 1975 | European Junior Championship Preliminary | A07 King's Indian Attack |
| 5. A Hessenbruch vs L Roos |
| 0-1 | 22 | 1975 | European Junior Championship Preliminary | D94 Grunfeld |
| 6. L Roos vs P Tonoli |
| 1-0 | 36 | 1975 | European Junior Championship Preliminary | A00 Uncommon Opening |
| 7. F Oney vs L Roos |
| 1-0 | 29 | 1975 | European Junior Championship Preliminary | C16 French, Winawer |
| 8. A Ladisic vs L Roos |
 | 0-1 | 23 | 1976 | Bagneux op | C16 French, Winawer |
| 9. L Roos vs B Tiller |
| ½-½ | 57 | 1977 | European Junior Championship 1977/78 | C02 French, Advance |
| 10. J Arnason vs L Roos |
| 1-0 | 35 | 1977 | European Junior Championship 1977/78 | C16 French, Winawer |
| 11. L Roos vs N Ristic |
| ½-½ | 41 | 1977 | European Junior Championship 1977/78 | B25 Sicilian, Closed |
| 12. E Pedersen vs L Roos |
| ½-½ | 40 | 1977 | European Junior Championship 1977/78 | A04 Reti Opening |
| 13. L Roos vs G Franzoni |
| ½-½ | 19 | 1977 | European Junior Championship 1977/78 | B29 Sicilian, Nimzovich-Rubinstein |
| 14. T Klauner vs L Roos |
| 0-1 | 20 | 1977 | European Junior Championship 1977/78 | A10 English |
| 15. L Roos vs C M Bjork |
| 0-1 | 57 | 1977 | European Junior Championship 1977/78 | C02 French, Advance |
| 16. T Yilmaz vs L Roos |
| 0-1 | 52 | 1977 | European Junior Championship 1977/78 | C02 French, Advance |
| 17. A Groszpeter vs L Roos |
| 1-0 | 31 | 1977 | European Junior Championship 1977/78 | B40 Sicilian |
| 18. L Roos vs K Panczyk |
| 1-0 | 47 | 1978 | European Junior Championship 1977/78 | A04 Reti Opening |
| 19. J Pereira Santos vs L Roos |
| 0-1 | 28 | 1978 | European Junior Championship 1977/78 | A31 English, Symmetrical, Benoni Formation |
| 20. M Rivas Pastor vs L Roos |
| 0-1 | 34 | 1978 | European Junior Championship 1977/78 | A12 English with b3 |
| 21. L Roos vs S Taulbut |
| 0-1 | 43 | 1978 | European Junior Championship 1977/78 | A25 English |
| 22. L Roos vs L Ogaard |
| 1-0 | 52 | 1978 | Buenos Aires Olympiad | C02 French, Advance |
| 23. L Roos vs N Birnboim |
| 0-1 | 31 | 1978 | Buenos Aires Olympiad | B33 Sicilian |
| 24. Suba vs L Roos |
| 1-0 | 23 | 1978 | Buenos Aires Olympiad | A16 English |
| 25. L Roos vs J L Pelaez Contti |
| 1-0 | 41 | 1978 | Buenos Aires Olympiad | B25 Sicilian, Closed |
Kibitzing
