| Game |
| Result | Moves |
Year |
Event/Locale | Opening |
| 1. I Pleci vs Letelier |
| 1-0 | 42 |
1936 |
Mar del Plata it-03 | A28 English |
| 2. Letelier vs R Charlier |
| 1-0 | 31 |
1936 |
Mar del Plata it-03 | D31 Queen's Gambit Declined |
| 3. R Flores-Alvarez vs Letelier |
 | 0-1 | 31 |
1936 |
Mar del Plata it-03 | D17 Queen's Gambit Declined Slav |
| 4. Letelier vs J C Balparda |
| 1-0 | 42 |
1936 |
Mar del Plata it-03 | B43 Sicilian, Kan, 5.Nc3 |
| 5. C Hounie Fleurquin vs Letelier |
| 1-0 | 40 |
1936 |
Mar del Plata it-03 | C17 French, Winawer, Advance |
| 6. Letelier vs Jacobo Bolbochan |
| 1-0 | 35 |
1936 |
Mar del Plata it-03 | D46 Queen's Gambit Declined Semi-Slav |
| 7. B H Villegas vs Letelier |
| 0-1 | 37 |
1936 |
Mar del Plata it-03 | A04 Reti Opening |
| 8. Letelier vs A Pons |
| ½-½ | 77 |
1936 |
Mar del Plata it-03 | D30 Queen's Gambit Declined |
| 9. A Schwartzman vs Letelier |
| 1-0 | 25 |
1936 |
Mar del Plata it-03 | E23 Nimzo-Indian, Spielmann |
| 10. Letelier vs J Vinuesa |
| 0-1 | 62 |
1936 |
Mar del Plata it-03 | A04 Reti Opening |
| 11. Guimard vs Letelier |
| ½-½ | 91 |
1936 |
Mar del Plata it-03 | E16 Queen's Indian |
| 12. Letelier vs L Piazzini |
| 0-1 | 39 |
1936 |
Mar del Plata it-03 | D17 Queen's Gambit Declined Slav |
| 13. Letelier vs J Traian Iliesco |
| 0-1 | 35 |
1936 |
Mar del Plata it-03 | A52 Budapest Gambit |
| 14. M Castillo vs Letelier |
| ½-½ | 44 |
1936 |
Mar del Plata it-03 | D85 Grunfeld |
| 15. Letelier vs V Fenoglio |
| 0-1 | 42 |
1936 |
Mar del Plata it-03 | B00 Uncommon King's Pawn Opening |
| 16. Letelier vs E Rotunno |
| ½-½ | 47 |
1938 |
Carrasco | B50 Sicilian |
| 17. Letelier vs J Canepa |
| ½-½ | 31 |
1938 |
Carrasco | E15 Queen's Indian |
| 18. Alekhine vs Letelier |
| 1-0 | 25 |
1938 |
Montevideo (08) | D29 Queen's Gambit Accepted, Classical |
| 19. Trompowsky vs Letelier |
| ½-½ | 24 |
1938 |
Carrasco | D53 Queen's Gambit Declined |
| 20. Letelier vs Pelikan |
| 0-1 | 81 |
1939 |
Buenos Aires ol (Men) fin-A | E95 King's Indian, Orthodox, 7...Nbd7, 8.Re1 |
| 21. A Gromer vs Letelier |
| 1-0 | 61 |
1939 |
Buenos Aires ol-8 pr B | C07 French, Tarrasch |
| 22. L Roux Cabral vs Letelier |
 | 0-1 | 22 |
1939 |
Buenos Aires ol-8 pr B | D85 Grunfeld |
| 23. Letelier vs L Engels |
| 0-1 | 21 |
1939 |
Buenos Aires ol-8 pr B | A82 Dutch, Staunton Gambit |
| 24. Letelier vs A Kiprov |
| 1-0 | 40 |
1939 |
Buenos Aires ol-8 pr B | D62 Queen's Gambit Declined, Orthodox, Rubinstein Attack |
| 25. Najdorf vs Letelier |
| 1-0 | 44 |
1945 |
Vina del Mar ;HCL 41 | A22 English |