| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. F J Sanz Alonso vs Larsen |
| 0-1 | 43 |
1976 |
Costa Brava | D79 Neo-Grunfeld, 6.O-O, Main line |
| 2. F J Sanz Alonso vs Larsen |
| 0-1 | 40 |
1978 |
Las Palmas | B08 Pirc, Classical |
| 3. F J Sanz Alonso vs Beliavsky |
 | 0-1 | 29 |
1978 |
Alicante (Spain) | C26 Vienna |
| 4. F J Sanz Alonso vs Sosonko |
| 0-1 | 35 |
1978 |
Amsterdam | B22 Sicilian, Alapin |
| 5. F J Sanz Alonso vs Miles |
| 0-1 | 33 |
1978 |
Amsterdam | B22 Sicilian, Alapin |
| 6. F J Sanz Alonso vs Zsuzsa Polgar |
| 0-1 | 70 |
1989 |
Leon | B27 Sicilian |
| 7. F Braga vs F J Sanz Alonso |
| 0-1 | 46 |
1990 |
8, Leon ESP [Hiarcs 7.32 (10s) | A81 Dutch |
| 8. F J Sanz Alonso vs Granda-Zuniga |
| 0-1 | 76 |
1991 |
x | B31 Sicilian, Rossolimo Variation |
| 9. J A Nunez Vallina vs F J Sanz Alonso |
| 0-1 | 28 |
1991 |
It (active) | C44 King's Pawn Game |
| 10. F J Sanz Alonso vs Dreev |
| 0-1 | 25 |
1992 |
It (open) | C41 Philidor Defense |
| 11. F J Sanz Alonso vs Suba |
| 0-1 | 39 |
1993 |
Elgoibar | B50 Sicilian |
| 12. Olaizola Ortega,L vs F J Sanz Alonso |
| 0-1 | 45 |
2001 |
TCh-ESP Div 2 | A46 Queen's Pawn Game |
| 13. F J Sanz Alonso vs Fe Silva |
| 0-1 | 38 |
2001 |
43rd Tch-POR | E10 Queen's Pawn Game |
| 14. F J Sanz Alonso vs Galego |
| 0-1 | 85 |
2001 |
43rd Tch-POR | B22 Sicilian, Alapin |
| 15. R Abhyudaya vs F J Sanz Alonso |
| 0-1 | 22 |
2006 |
XXIV Andorra Open | C79 Ruy Lopez, Steinitz Defense Deferred |
| 16. F J Sanz Alonso vs S P Sethuraman |
| 0-1 | 46 |
2006 |
XXIV Andorra Open | C31 King's Gambit Declined, Falkbeer Counter Gambit |
