| page 2 of 9; games 26-50 of 204 |
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| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. L Piasetski vs L Roos |
| 1-0 | 41 | 1978 | Buenos Aires Olympiad | A28 English |
| 27. L Roos vs A Fernandez |
| 0-1 | 36 | 1978 | Buenos Aires Olympiad | B25 Sicilian, Closed |
| 28. Timman vs L Roos |
| 1-0 | 35 | 1978 | Amsterdam Zonal | D85 Grunfeld |
| 29. L Roos vs Speelman |
| 0-1 | 40 | 1978 | Amsterdam Zonal | B46 Sicilian, Taimanov Variation |
| 30. J Feller vs L Roos |
| 0-1 | 20 | 1978 | Amsterdam Zonal | C15 French, Winawer |
| 31. L Roos vs Sosonko |
| 0-1 | 42 | 1978 | Amsterdam Zonal | B25 Sicilian, Closed |
| 32. M Rivas Pastor vs L Roos |
| ½-½ | 41 | 1978 | Amsterdam Zonal | A07 King's Indian Attack |
| 33. L Roos vs E Keogh |
| 0-1 | 29 | 1978 | Amsterdam Zonal | C64 Ruy Lopez, Classical |
| 34. M Stean vs L Roos |
 | 1-0 | 39 | 1978 | Amsterdam Zonal | A16 English |
| 35. L Roos vs G Ligterink |
| 0-1 | 25 | 1978 | Amsterdam Zonal | B30 Sicilian |
| 36. F Sanz Alonso vs L Roos |
| 1-0 | 19 | 1978 | Amsterdam Zonal | C15 French, Winawer |
| 37. L Roos vs Miles |
| 0-1 | 38 | 1978 | Amsterdam Zonal | B24 Sicilian, Closed |
| 38. J Bellon Lopez vs L Roos |
| 0-1 | 57 | 1978 | Amsterdam Zonal | B43 Sicilian, Kan, 5.Nc3 |
| 39. L Roos vs K Langeweg |
| 1-0 | 48 | 1978 | Amsterdam Zonal | B40 Sicilian |
| 40. R Meulders vs L Roos |
| 0-1 | 37 | 1978 | Amsterdam Zonal | C03 French, Tarrasch |
| 41. L Roos vs G Morrison |
| 0-1 | 44 | 1978 | Amsterdam Zonal | B67 Sicilian, Richter-Rauzer Attack, 7...a6 Defense, 8...Bd7 |
| 42. N Skalkotas vs L Roos |
| ½-½ | 21 | 1980 | Valletta Olympiad | A96 Dutch, Classical Variation |
| 43. Y Gruenfeld vs L Roos |
| 1-0 | 70 | 1980 | Valletta Olympiad | C05 French, Tarrasch |
| 44. M Fuller vs L Roos |
| ½-½ | 37 | 1980 | Valletta Olympiad | A04 Reti Opening |
| 45. U Jahr vs L Roos |
| 1-0 | 32 | 1981 | Copenhagen Open | C05 French, Tarrasch |
| 46. L Roos vs T Kristiansen |
| ½-½ | 21 | 1981 | Copenhagen Open | C42 Petrov Defense |
| 47. H Tjarnemo vs L Roos |
| 0-1 | 37 | 1981 | Copenhagen Open | B43 Sicilian, Kan, 5.Nc3 |
| 48. L Roos vs A Jensen |
| ½-½ | 46 | 1981 | Copenhagen Open | C83 Ruy Lopez, Open |
| 49. S Bjarnason vs L Roos |
| 0-1 | 33 | 1981 | Copenhagen Open | C16 French, Winawer |
| 50. L Roos vs T Ernst |
| 1-0 | 25 | 1981 | Copenhagen Open | C56 Two Knights |
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| page 2 of 9; games 26-50 of 204 |
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Kibitzing
