| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 26. F Borges vs J F Donovan |
| ½-½ | 37 | 1954 | 55th US Open | B21 Sicilian, 2.f4 and 2.d4 |
| 27. F Bohatirchuk vs Sajtar |
| ½-½ | 32 | 1954 | Amsterdam Olympiad qual-2 | B21 Sicilian, 2.f4 and 2.d4 |
| 28. P Smederevac vs Puc |
| ½-½ | 32 | 1955 | YUG-ch | B21 Sicilian, 2.f4 and 2.d4 |
| 29. Ivkov vs Szabo |
| ½-½ | 57 | 1955 | Mar del Plata | B21 Sicilian, 2.f4 and 2.d4 |
| 30. Matulovic vs D Ciric |
| ½-½ | 42 | 1956 | YUG-ch | B21 Sicilian, 2.f4 and 2.d4 |
| 31. K Plater vs Benko |
| ½-½ | 20 | 1957 | Dublin Zonal | B21 Sicilian, 2.f4 and 2.d4 |
| 32. M Rantanen vs L Schmid |
| ½-½ | 54 | 1958 | Munich Olympiad qual-2 | B21 Sicilian, 2.f4 and 2.d4 |
| 33. N Macleod vs L A Sanchez |
 | ½-½ | 27 | 1958 | 13th olm qual. group 3 | B21 Sicilian, 2.f4 and 2.d4 |
| 34. Maric vs Eliskases |
| ½-½ | 22 | 1958 | Sarajevo | B21 Sicilian, 2.f4 and 2.d4 |
| 35. Opocensky vs J Podgorny |
| ½-½ | 58 | 1959 | CSR-ch | B21 Sicilian, 2.f4 and 2.d4 |
| 36. V Hofman vs Ujtelky |
| ½-½ | 41 | 1959 | CSR-ch | B21 Sicilian, 2.f4 and 2.d4 |
| 37. T Haahr vs K Blom |
| ½-½ | 44 | 1960 | DEN-ch | B21 Sicilian, 2.f4 and 2.d4 |
| 38. Fischer vs Korchnoi |
| ½-½ | 29 | 1960 | Buenos Aires | B21 Sicilian, 2.f4 and 2.d4 |
| 39. Ramesh D Seth vs A Filipowicz |
| ½-½ | 28 | 1960 | Leipzig Olympiad Final-B | B21 Sicilian, 2.f4 and 2.d4 |
| 40. Botvinnik vs Furman |
| ½-½ | 29 | 1961 | Training Game | B21 Sicilian, 2.f4 and 2.d4 |
| 41. Parma vs Eliskases |
| ½-½ | 50 | 1962 | Mar del Plata | B21 Sicilian, 2.f4 and 2.d4 |
| 42. K Skold vs S Purevzhav |
| ½-½ | 32 | 1962 | Varna Olympiad Final-B | B21 Sicilian, 2.f4 and 2.d4 |
| 43. O Kinnmark vs Robatsch |
| ½-½ | 48 | 1963 | Halle Zonal | B21 Sicilian, 2.f4 and 2.d4 |
| 44. Larsen vs Larry Evans |
| ½-½ | 41 | 1964 | Amsterdam Interzonal | B21 Sicilian, 2.f4 and 2.d4 |
| 45. Larsen vs Tal |
| ½-½ | 31 | 1964 | Amsterdam Interzonal | B21 Sicilian, 2.f4 and 2.d4 |
| 46. Vsevolod Orlov vs Shamkovich |
| ½-½ | 38 | 1964 | Moscow-ch | B21 Sicilian, 2.f4 and 2.d4 |
| 47. D E Lloyd vs Keene |
 | ½-½ | 37 | 1964 | London League | B21 Sicilian, 2.f4 and 2.d4 |
| 48. R Silva Nazzari vs M Colon Romero |
| ½-½ | 34 | 1964 | Tel Aviv Olympiad qual-5 | B21 Sicilian, 2.f4 and 2.d4 |
| 49. F Kuijpers vs J Flesch |
| ½-½ | 45 | 1965 | Malaga 5th | B21 Sicilian, 2.f4 and 2.d4 |
| 50. Larsen vs Bobotsov |
| ½-½ | 14 | 1966 | Le Havre | B21 Sicilian, 2.f4 and 2.d4 |
Kibitzing
