| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. K Maeder vs C Zuidema |
| ½-½ | 30 | 1969 | Amsterdam IBM-B | C52 Evans Gambit |
| 27. P de Rooi vs K Maeder |
| 0-1 | 29 | 1969 | Amsterdam IBM-B | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 28. K Maeder vs E Scholl |
| 0-1 | 33 | 1969 | Amsterdam IBM-B | C45 Scotch Game |
| 29. M Gerusel vs K Maeder |
| 0-1 | 35 | 1969 | Amsterdam IBM-B | E75 King's Indian, Averbakh, Main line |
| 30. K Maeder vs S Johannessen |
| 1-0 | 24 | 1969 | Amsterdam IBM-B | C41 Philidor Defense |
| 31. K Maeder vs T van Scheltinga |
| 1-0 | 63 | 1969 | Amsterdam IBM-B | B43 Sicilian, Kan, 5.Nc3 |
| 32. J van Baarle vs K Maeder |
| ½-½ | 33 | 1969 | Amsterdam IBM-B | E92 King's Indian |
| 33. K Maeder vs P Ostojic |
| 1-0 | 41 | 1969 | Amsterdam IBM-B | B32 Sicilian |
| 34. M Ujtelky vs K Maeder |
| ½-½ | 41 | 1969 | Amsterdam IBM-B | A15 English |
| 35. K Maeder vs Csom |
| ½-½ | 14 | 1969 | Amsterdam IBM-B | B60 Sicilian, Richter-Rauzer |
| 36. J Diez del Corral vs K Maeder |
| 1-0 | 34 | 1969 | Amsterdam IBM-B | B99 Sicilian, Najdorf, 7...Be7 Main line |
| 37. R Weill vs K Maeder |
| 0-1 | 33 | 1969 | World Student Team Championship qual-2 | A26 English |
| 38. K Maeder vs L Vadasz |
| 1-0 | 31 | 1969 | World Student Team Championship qual-2 | B06 Robatsch |
| 39. J Sloth vs K Maeder |
| 1-0 | 40 | 1969 | World Student Team Championship qual-2 | A15 English |
| 40. K Maeder vs M Schoeneberg |
| ½-½ | 70 | 1969 | World Student Team Championship Final-A | B80 Sicilian, Scheveningen |
| 41. A Soltis vs K Maeder |
| 1-0 | 31 | 1969 | World Student Team Championship Final-A | B90 Sicilian, Najdorf |
| 42. T Bjerre vs K Maeder |
| 0-1 | 42 | 1969 | World Student Team Championship Final-A | E93 King's Indian, Petrosian System |
| 43. K Maeder vs M Podgaets |
| 0-1 | 35 | 1969 | World Student Team Championship Final-A | B18 Caro-Kann, Classical |
| 44. D Zara vs K Maeder |
| 1-0 | 40 | 1969 | World Student Team Championship Final-A | E00 Queen's Pawn Game |
| 45. K Maeder vs S Martinovic |
| ½-½ | 19 | 1969 | World Student Team Championship Final-A | B97 Sicilian, Najdorf |
| 46. L Day vs K Maeder |
 | 1-0 | 27 | 1970 | Hoogovens-B | A07 King's Indian Attack |
| 47. K Maeder vs J Piket |
| ½-½ | 13 | 1970 | Hoogovens-B | B61 Sicilian, Richter-Rauzer, Larsen Variation, 7.Qd2 |
| 48. Forintos vs K Maeder |
| ½-½ | 33 | 1970 | Hoogovens-B | E70 King's Indian |
| 49. K Maeder vs R Hartoch |
| 0-1 | 57 | 1970 | Hoogovens-B | B09 Pirc, Austrian Attack |
| 50. D van Geet vs K Maeder |
| 1-0 | 58 | 1970 | Hoogovens-B | A04 Reti Opening |
Kibitzing
