| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. P Lapiken vs R Jacobs |
| 1-0 | 51 | 1954 | 2nd Pan-American Chess Congress | B00 Uncommon King's Pawn Opening |
| 2. S E Almgren vs R Jacobs |
| 0-1 | 29 | 1954 | 2nd Pan-American Chess Congress | B00 Uncommon King's Pawn Opening |
| 3. A Kaminsky vs R Jacobs |
| ½-½ | 36 | 1954 | 2nd Pan-American Chess Congress | D02 Queen's Pawn Game |
| 4. R Jacobs vs L Evans |
| 0-1 | 51 | 1955 | 56th US Open | B51 Sicilian, Canal-Sokolsky (Rossolimo) Attack |
| 5. M Hart vs R Jacobs |
 | 0-1 | 12 | 1955 | 56th US Open | C57 Two Knights |
| 6. R Jacobs vs H Berliner |
| 0-1 | 46 | 1955 | 56th US Open | B03 Alekhine's Defense |
| 7. R Jacobs vs K Burger |
| 0-1 | 23 | 1955 | 56th US Open | B31 Sicilian, Rossolimo Variation |
| 8. R Jacobs vs P Brandts |
| 0-1 | 46 | 1955 | 56th US Open | C85 Ruy Lopez, Exchange Variation Doubly Deferred (DERLD) |
| 9. T Weinberger vs R Jacobs |
| 1-0 | 51 | 1959 | Santa Monica Championship | D12 Queen's Gambit Declined Slav |
| 10. T Weinberger vs R Jacobs |
| 1-0 | 34 | 1961 | California Open | C44 King's Pawn Game |
| 11. P D Smith vs R Jacobs |
| ½-½ | 26 | 1965 | Monterey op | C44 King's Pawn Game |
| 12. R Jacobs vs D Cotten |
| 1-0 | 24 | 1965 | Riverside op | C47 Four Knights |
| 13. R Jacobs vs T Weinberger |
| 1-0 | 28 | 1969 | Pacific Southwest Open | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 14. R Jacobs vs A A Keske |
| ½-½ | 51 | 1976 | USCF Absolute-ch corr | C15 French, Winawer |
| 15. A A Keske vs R Jacobs |
| 0-1 | 80 | 1976 | USCF Absolute-ch corr | D78 Neo-Grunfeld, 6.O-O c6 |
| 16. R Jacobs vs S Matzke |
| 1-0 | 23 | 1989 | WT/M\454 | C14 French, Classical |
| 17. J Davies vs R Jacobs |
 | ½-½ | 38 | 1989 | St. Louis District Ch. | C67 Ruy Lopez |
| 18. R Jacobs vs J F McLaughlin |
| 1-0 | 40 | 1989 | St. Louis District Ch. | C50 Giuoco Piano |
| 19. R Jacobs vs H Beutel |
| 1-0 | 25 | 1989 | corr ICCF Master | C24 Bishop's Opening |
| 20. D Eckert vs R Jacobs |
| ½-½ | 29 | 1989 | St. Louis District Ch. | D16 Queen's Gambit Declined Slav |
| 21. R Sheffield vs R Jacobs |
| ½-½ | 42 | 1989 | St. Louis District Ch. | D12 Queen's Gambit Declined Slav |
| 22. R Jacobs vs D Heurung |
| 1-0 | 20 | 1989 | St. Louis District Ch. | B10 Caro-Kann |
| 23. R Jacobs vs M Bock |
| ½-½ | 39 | 1989 | St. Louis District Ch. | B06 Robatsch |
| 24. R Jacobs vs P Moulin |
| 0-1 | 37 | 1989 | St. Louis District Ch. | B23 Sicilian, Closed |
| 25. W M Spedale vs R Jacobs |
| 0-1 | 71 | 1990 | US Amateur Team Ch | C48 Four Knights |
Kibitzing
