| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. R Gruchacz vs E Schiller |
  | ½-½ | 37 |
1970 |
New York Junior Championship | B20 Sicilian |
| 2. K Rogoff vs R Gruchacz |
 | 1-0 | 41 |
1976 |
Lone Pine | A13 English |
| 3. Najdorf vs R Gruchacz |
| 1-0 | 43 |
1976 |
Lone Pine | A08 King's Indian Attack |
| 4. D Fritzinger vs R Gruchacz |
| ½-½ | 34 |
1976 |
Lone Pine | B40 Sicilian |
| 5. R Gruchacz vs Biyiasas |
| 1-0 | 45 |
1976 |
Lone Pine | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 6. R Gruchacz vs M Sisniega |
| 0-1 | 65 |
1976 |
Lone Pine | B56 Sicilian |
| 7. J L Watson vs R Gruchacz |
| 1-0 | 45 |
1976 |
Lone Pine | A22 English |
| 8. R Gruchacz vs C Barnes |
| 1-0 | 92 |
1976 |
Lone Pine | B29 Sicilian, Nimzovich-Rubinstein |
| 9. R Gruchacz vs Fedorowicz |
| ½-½ | 10 |
1978 |
Lone Pine | B45 Sicilian, Taimanov |
| 10. R Gruchacz vs Z Mestrovic |
| 0-1 | 42 |
1978 |
Lone Pine | B00 Uncommon King's Pawn Opening |
| 11. H Westerinen vs R Gruchacz |
| 1-0 | 48 |
1978 |
Lone Pine | B40 Sicilian |
| 12. R Gruchacz vs W Morris |
| 0-1 | 40 |
1978 |
Lone Pine | C26 Vienna |
| 13. R C Balinas vs R Gruchacz |
| ½-½ | 16 |
1978 |
Lone Pine | B33 Sicilian |
| 14. V Zaltsman vs R Gruchacz |
| 1-0 | 47 |
1978 |
Lone Pine | A30 English, Symmetrical |
| 15. G Garcia vs R Gruchacz |
 | 0-1 | 34 |
1978 |
Lone Pine | B33 Sicilian |
| 16. R Gruchacz vs Lombardy |
| 1-0 | 44 |
1978 |
Lone Pine | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 17. S Odendahl vs R Gruchacz |
| 1-0 | 30 |
1978 |
Lone Pine | A04 Reti Opening |
| 18. R Gruchacz vs J Benjamin |
| ½-½ | 44 |
1979 |
08, Marshall it | C69 Ruy Lopez, Exchange, Gligoric Variation, 6.d4 |
| 19. E Schiller vs R Gruchacz |
| ½-½ | 17 |
1979 |
Huntington | E12 Queen's Indian |
| 20. R Gruchacz vs Dzindzichashvili |
| ½-½ | 46 |
1980 |
New York | C60 Ruy Lopez |
| 21. R Gruchacz vs Miles |
 | 0-1 | 48 |
1980 |
USA | B77 Sicilian, Dragon, Yugoslav Attack |
| 22. Chandler vs R Gruchacz |
| 1-0 | 27 |
1980 |
Brighton (England) | E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) |
| 23. Alburt vs R Gruchacz |
| ½-½ | 60 |
1980 |
New York (USA) | B39 Sicilian, Accelerated Fianchetto, Breyer Variation |
| 24. R Gruchacz vs L Shamkovich |
| ½-½ | 34 |
1980 |
New York (USA) | B82 Sicilian, Scheveningen |
| 25. R Gruchacz vs E Schiller |
 | 0-1 | 40 |
1986 |
Illinois | B41 Sicilian, Kan |