| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. N Kazilaris vs I Gelfer |
| 0-1 | 34 | 1969 | World Student Team Championship Final-B | E60 King's Indian Defense |
| 27. I Gelfer vs J Boudy Bueno |
| ½-½ | 17 | 1969 | World Student Team Championship Final-B | E45 Nimzo-Indian, 4.e3, Bronstein (Byrne) Variation |
| 28. Westerinen vs I Gelfer |
| ½-½ | 41 | 1969 | World Student Team Championship Final-B | C05 French, Tarrasch |
| 29. I Gelfer vs J Tompa |
| 1-0 | 40 | 1969 | World Student Team Championship Final-B | B33 Sicilian |
| 30. G Sigurjonsson vs I Gelfer |
| 1-0 | 25 | 1969 | World Student Team Championship Final-B | A04 Reti Opening |
| 31. I Gelfer vs E Bukacek |
| 1-0 | 14 | 1969 | World Student Team Championship Final-B | A85 Dutch, with c4 & Nc3 |
| 32. A Zwaig vs I Gelfer |
| ½-½ | 16 | 1969 | World Student Team Championship Final-B | A36 English |
| 33. I Gelfer vs R Rodriguez |
| 0-1 | 58 | 1969 | World Student Team Championship Final-B | E81 King's Indian, Samisch |
| 34. I Gelfer vs L Liljedahl |
| ½-½ | 41 | 1970 | Siegen Olympiad Final-B | E44 Nimzo-Indian, Fischer Variation, 5.Ne2 |
| 35. O Jakobsen vs I Gelfer |
 | 0-1 | 13 | 1970 | Siegen Olympiad Final-B | A02 Bird's Opening |
| 36. H Bouwmeester vs I Gelfer |
| ½-½ | 44 | 1970 | Siegen Olympiad Final-B | E41 Nimzo-Indian |
| 37. A H Hamdan vs I Gelfer |
| 0-1 | 46 | 1970 | Siegen Olympiad Final-B | B54 Sicilian |
| 38. I Gelfer vs P Jigjidsuren |
| 1-0 | 63 | 1970 | Siegen Olympiad Final-B | E46 Nimzo-Indian |
| 39. K Janetschek vs I Gelfer |
| 1-0 | 72 | 1970 | Siegen Olympiad Final-B | B98 Sicilian, Najdorf |
| 40. I Gelfer vs M Czerniak |
| 0-1 | 49 | 1974 | ISR-ch 1973/74 | B01 Scandinavian |
| 41. M Czerniak vs I Gelfer |
| 1-0 | 53 | 1976 | ISR-ch | E00 Queen's Pawn Game |
| 42. I Gelfer vs Van der Wiel |
| ½-½ | 15 | 1978 | 2nd ECC round of 16 | E73 King's Indian |
| 43. I Gelfer vs L Lederman |
| 1-0 | 41 | 1979 | Ramat HaSharon | A56 Benoni Defense |
| 44. I Zilber vs I Gelfer |
| ½-½ | 46 | 1979 | Ramat HaSharon | A46 Queen's Pawn Game |
| 45. I Gelfer vs E Pedersen |
| 1-0 | 28 | 1979 | Ramat HaSharon | A61 Benoni |
| 46. M Basman vs I Gelfer |
| 1-0 | 55 | 1979 | Ramat HaSharon | A00 Uncommon Opening |
| 47. I Gelfer vs Y Afek |
| 1-0 | 34 | 1979 | Ramat HaSharon | A41 Queen's Pawn Game (with ...d6) |
| 48. J Cuellar vs I Gelfer |
| 0-1 | 43 | 1979 | Ramat HaSharon | B81 Sicilian, Scheveningen, Keres Attack |
| 49. I Gelfer vs I Lipnowski |
| ½-½ | 50 | 1979 | Ramat HaSharon | A42 Modern Defense, Averbakh System |
| 50. I Gelfer vs N Grinberg |
| 0-1 | 36 | 1979 | Ramat HaSharon | E19 Queen's Indian, Old Main line, 9.Qxc3 |
Kibitzing
