| 5 may 2021 | Perez Diez, Victor 2000 | 0-1 | Elissalt Cardenas, Hector 2281 | B26 Sicilian Defense: Closed | 1 · mesa 1 |
| 5 may 2021 | Ortega Ruiz, Jose Miguel 2253 | ½-½ | Rey Martinez, Jaime 1992 | B32 Sicilian Defense: Löwenthal Variation | 1 · mesa 2 |
| 5 may 2021 | Rodriguez Avila, Alvaro 1966 | ½-½ | Mkrtchyan, Levon 2230 | C98 Ruy Lopez: Closed, Chigorin Defense | 1 · mesa 3 |
| 5 may 2021 | Bustos Bernardo, Samuel 2213 | 1-0 | Demerson Joly, Javier 1959 | D25 Queen's Gambit Accepted: Janowski-Larsen Variation | 1 · mesa 4 |
| 5 may 2021 | Cabanas Bravo, Juan Andres 1948 | 0-1 | Quevedo Marin, Manuel 2201 | B15 Caro-Kann Defense: Forgacs Variation | 1 · mesa 5 |
| 5 may 2021 | Rottenwohrer Suarez, Juan 2196 | 1-0 | Torres Rebolledo, Victor 1937 | D31 Queen's Gambit Declined: Charousek Variation | 1 · mesa 6 |
| 5 may 2021 | Bravo De La Vega, Alvaro 1936 | 1-0 | De La Puerta Cresis, Javier 2169 | B96 Sicilian Defense: Najdorf Variation | 1 · mesa 7 |
| 5 may 2021 | Pindado Campos, Raul 2152 | 1-0 | Neagu, Roberto Florin 1881 | E05 Catalan Opening: Open Defense, Classical Line | 1 · mesa 8 |
| 5 may 2021 | Rojas Pozo, Jose Luis 1875 | ½-½ | Martinez Fernandez, Raul 2141 | D45 Semi-Slav Defense: Accelerated Meran Variation | 1 · mesa 9 |
| 5 may 2021 | Hernandez Ramos, David 2101 | 1-0 | Vukotic Jovsic, Dragan 1859 | D31 Queen's Gambit Declined: Charousek Variation | 1 · mesa 10 |
| 5 may 2021 | Rico Jimenez, Samuel 1850 | 0-1 | Perez Gonzalez, Daniel 2056 | B92 Sicilian Defense: Najdorf Variation, Opocensky Variation | 1 · mesa 11 |
| 5 may 2021 | Pablos Tenrero, Raquel 2049 | 1-0 | Huerto Moreno, Jorge 1837 | C60 Ruy Lopez: Fianchetto Defense | 1 · mesa 12 |
| 5 may 2021 | Garcia Fernandez, Jesus 1803 | 0-1 | Fernandez Rosado, Roberto 2029 | D00 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit | 1 · mesa 13 |
| 5 may 2021 | Centeno Mendoza, Julio Stefano 2012 | ½-½ | Tapia Sanchez, Jose Manuel 1750 | C59 Italian Game: Two Knights Defense, Steinitz Variation | 1 · mesa 14 |
| 6 may 2021 | Elissalt Cardenas, Hector 2281 | 1-0 | Hernandez Ramos, David 2101 | D55 Queen's Gambit Declined: Anti-Tartakower Variation | 2 · mesa 1 |
| 6 may 2021 | Perez Gonzalez, Daniel 2056 | ½-½ | Bustos Bernardo, Samuel 2213 | D56 Queen's Gambit Declined: Lasker Defense | 2 · mesa 2 |
| 6 may 2021 | Quevedo Marin, Manuel 2201 | 0-1 | Bravo De La Vega, Alvaro 1936 | C29 Vienna Game: Vienna Gambit, Paulsen Attack | 2 · mesa 3 |
| 6 may 2021 | Fernandez Rosado, Roberto 2029 | 0-1 | Rottenwohrer Suarez, Juan 2196 | B06 Modern Defense | 2 · mesa 4 |
| 6 may 2021 | Del Castillo Izquierdo, Jose 1728 | 0-1 | Pindado Campos, Raul 2152 | D61 Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation | 2 · mesa 5 |
| 6 may 2021 | Tapia Sanchez, Jose Manuel 1750 | 0-1 | Ortega Ruiz, Jose Miguel 2253 | C77 Ruy Lopez: Morphy Defense, Mackenzie Variation | 2 · mesa 6 |
| 6 may 2021 | Mkrtchyan, Levon 2230 | 1-0 | Rojas Pozo, Jose Luis 1875 | C47 Four Knights Game: Scotch Variation Accepted | 2 · mesa 7 |
| 6 may 2021 | Martinez Fernandez, Raul 2141 | ½-½ | Rodriguez Avila, Alvaro 1966 | B27 Sicilian Defense: Hyperaccelerated Dragon | 2 · mesa 8 |
| 6 may 2021 | Rey Martinez, Jaime 1992 | 1-0 | Centeno Mendoza, Julio Stefano 2012 | B04 Alekhine Defense: Modern Variation, Larsen-Haakert Variation | 2 · mesa 9 |
| 6 may 2021 | De La Puerta Cresis, Javier 2169 | 1-0 | Rico Jimenez, Samuel 1850 | A40 Queen's Pawn Game | 2 · mesa 10 |
| 6 may 2021 | Torres Rebolledo, Victor 1937 | 0-1 | Martinez-Conde Hernandez, Carlos 2104 | E92 King's Indian Defense: Exchange Variation | 2 · mesa 11 |
| 6 may 2021 | Neagu, Roberto Florin 1881 | ½-½ | Perez Diez, Victor 2000 | A27 English Opening: King's English Variation, Three Knights System | 2 · mesa 12 |
| 6 may 2021 | Demerson Joly, Javier 1959 | 0-1 | Garcia Fernandez, Jesus 1803 | B14 Caro-Kann Defense: Panov Attack, Fianchetto Defense | 2 · mesa 13 |
| 6 may 2021 | Vukotic Jovsic, Dragan 1859 | 0-1 | Cabanas Bravo, Juan Andres 1948 | A46 Indian Defense: Spielmann-Indian | 2 · mesa 14 |
| 7 may 2021 | Rottenwohrer Suarez, Juan 2196 | 1-0 | Pindado Campos, Raul 2152 | D35 Queen's Gambit Declined: Exchange Variation, Positional Variation | 3 · mesa 1 |
| 7 may 2021 | Bravo De La Vega, Alvaro 1936 | 0-1 | Mkrtchyan, Levon 2230 | C24 Bishop's Opening: Vienna Hybrid | 3 · mesa 2 |
| 7 may 2021 | Ortega Ruiz, Jose Miguel 2253 | 1-0 | Perez Gonzalez, Daniel 2056 | B73 Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation | 3 · mesa 3 |
| 7 may 2021 | Bustos Bernardo, Samuel 2213 | 0-1 | Rey Martinez, Jaime 1992 | D26 Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Development Variation | 3 · mesa 4 |
| 7 may 2021 | Rodriguez Avila, Alvaro 1966 | 0-1 | Quevedo Marin, Manuel 2201 | C83 Ruy Lopez: Open, Classical Defense, Main Line | 3 · mesa 5 |
| 7 may 2021 | De La Puerta Cresis, Javier 2169 | 1-0 | Fernandez Rosado, Roberto 2029 | C58 Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | 3 · mesa 6 |
| 7 may 2021 | Cabanas Bravo, Juan Andres 1948 | 0-1 | Martinez Fernandez, Raul 2141 | C21 Danish Gambit Declined: Sörensen Defense | 3 · mesa 7 |
| 7 may 2021 | Martinez-Conde Hernandez, Carlos 2104 | ½-½ | Garcia Fernandez, Jesus 1803 | B11 Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | 3 · mesa 8 |
| 7 may 2021 | Hernandez Ramos, David 2101 | 1-0 | Del Castillo Izquierdo, Jose 1728 | A06 Nimzo-Larsen Attack: Classical Variation | 3 · mesa 9 |
| 7 may 2021 | Centeno Mendoza, Julio Stefano 2012 | 1-0 | Neagu, Roberto Florin 1881 | B21 Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation | 3 · mesa 10 |
| 7 may 2021 | Rojas Pozo, Jose Luis 1875 | 1-0 | Tapia Sanchez, Jose Manuel 1750 | D02 Queen's Pawn Game: Chigorin Variation | 3 · mesa 11 |
| 7 may 2021 | Huerto Moreno, Jorge 1837 | 1-0 | Rodriguez Melendez, Juan Humbert 2174 | B21 Sicilian Defense: McDonnell Attack | 3 · mesa 12 |
| 7 may 2021 | Diaz-Roncero Gonzalez, Daniel 1658 | 0-1 | Demerson Joly, Javier 1959 | C43 Petrov's Defense: Modern Attack, Center Variation | 3 · mesa 13 |
| 8 may 2021 | Rey Martinez, Jaime 1992 | 1-0 | Rottenwohrer Suarez, Juan 2196 | B40 Sicilian Defense: French Variation, Westerinen Attack | 4 · mesa 1 |
| 8 may 2021 | Mkrtchyan, Levon 2230 | ½-½ | Ortega Ruiz, Jose Miguel 2253 | C54 Italian Game: Classical Variation, Giuoco Pianissimo | 4 · mesa 2 |
| 8 may 2021 | Martinez Fernandez, Raul 2141 | 0-1 | Elissalt Cardenas, Hector 2281 | B00 Pirc Defense | 4 · mesa 3 |
| 8 may 2021 | De La Puerta Cresis, Javier 2169 | ½-½ | Hernandez Ramos, David 2101 | C10 French Defense: Rubinstein Variation, Fort Knox Variation | 4 · mesa 4 |
| 8 may 2021 | Pindado Campos, Raul 2152 | ½-½ | Bravo De La Vega, Alvaro 1936 | E05 Catalan Opening: Open Defense, Classical Line | 4 · mesa 5 |
| 8 may 2021 | Perez Gonzalez, Daniel 2056 | 0-1 | Martinez-Conde Hernandez, Carlos 2104 | B48 Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | 4 · mesa 6 |
| 8 may 2021 | Garcia Fernandez, Jesus 1803 | 0-1 | Centeno Mendoza, Julio Stefano 2012 | D00 Queen's Pawn Game: Accelerated London System | 4 · mesa 7 |
| 8 may 2021 | Fernandez Rosado, Roberto 2029 | ½-½ | Rojas Pozo, Jose Luis 1875 | B01 Scandinavian Defense: Main Line | 4 · mesa 8 |
| 8 may 2021 | Vukotic Jovsic, Dragan 1859 | 1-0 | Rodriguez Avila, Alvaro 1966 | A48 London System | 4 · mesa 9 |