| 3 mar 2021 | Gonzalez Guedes, Iyan (IyanBuho) | Ver la partida 1-0 | -De La Pena Garcia, Blanca (Blanca226) | B22 Sicilian Defense: Alapin Variation | | ronda 4 · mesa 27 |
| 3 mar 2021 | De La Pena Garcia, Blanca (Blanca226) | Ver la partida 0-1 | -Gonzalez Guedes, Iyan (IyanBuho) | A01 Nimzo-Larsen Attack: Indian Variation | | ronda 4 · mesa 28 |
| 3 mar 2021 | Antuna Pavon, Lucas (milucas2008) | Ver la partida 1-0 | -Varela Cano, Hugo (HugoChess_33) | B80 Sicilian Defense: Scheveningen Variation | Antonio Rico A – Vetusta C | ronda 4 · mesa 29 |
| 3 mar 2021 | Varela Cano, Hugo (HugoChess_33) | Ver la partida 1-0 | -Antuna Pavon, Lucas (milucas2008) | B45 Sicilian Defense: Four Knights Variation | Antonio Rico A – Vetusta C | ronda 4 · mesa 30 |
| 3 mar 2021 | Rodriguez Garcia, Jose Antonio (joanr | Ver la partida 1-0 | -De Martin Burtseva, Ivan (Ivan0411Ovied | D31 Queen's Gambit Declined: Queen's Knight Variation | | ronda 4 · mesa 31 |
| 3 mar 2021 | De Martin Burtseva, Ivan (Ivan0411Ovied | Ver la partida 0-1 | -Rodriguez Garcia, Jose Antonio (joanr | B21 Sicilian Defense: Smith-Morra Gambit Accepted | | ronda 4 · mesa 32 |
| 3 mar 2021 | Biempica Marin, Alvaro (ALBM2011) | Ver la partida 1-0 | -Fernandez Calvo, Martin (martin32fde | A45 Indian Defense | | ronda 4 · mesa 33 |
| 3 mar 2021 | Fernandez Calvo, Martin (martin32fde | Ver la partida ½-½ | -Biempica Marin, Alvaro (ALBM2011) | A22 English Opening: King's English Variation, Two Knights Variation | | ronda 4 · mesa 34 |
| 3 mar 2021 | Gonzalez Garcia, Jesus (chuxjanter) | Ver la partida 1-0 | -Fernandez Garcia, Daniel (DaniFernand | C54 Italian Game: Classical Variation, Giuoco Pianissimo | | ronda 4 · mesa 35 |
| 3 mar 2021 | Fernandez Garcia, Daniel (DaniFernand | Ver la partida 0-1 | -Gonzalez Garcia, Jesus (chuxjanter) | C00 French Defense: Knight Variation | | ronda 4 · mesa 36 |
| 3 mar 2021 | Fernandez Trancon, David (David_Tranco | Ver la partida 1-0 | -Arribas Castro, Mauro (Mauro_Gijon) | D02 Queen's Pawn Game: Chigorin Variation | | ronda 4 · mesa 37 |
| 3 mar 2021 | Arribas Castro, Mauro (Mauro_Gijon) | Ver la partida ½-½ | -Fernandez Trancon, David (David_Tranco | B10 Caro-Kann Defense | | ronda 4 · mesa 38 |
| 3 mar 2021 | Rodriguez San Jose, Daniel (DANIEL_CABA | Ver la partida 1-0 | -Corrales Fernandez, Raul (Raulcf28) | D02 Queen's Pawn Game: Chigorin Variation | | ronda 4 · mesa 39 |
| 3 mar 2021 | Corrales Fernandez, Raul (Raulcf28) | Ver la partida 0-1 | -Rodriguez San Jose, Daniel (DANIEL_CABA | C45 Scotch Game: Classical Variation | | ronda 4 · mesa 40 |
| 3 mar 2021 | Martinez Otero, Carlos (omc40) | Ver la partida ½-½ | -Del Valle Rosas, Alfonso (DELVALLEOF | D37 Queen's Gambit Declined: Three Knights Variation | | ronda 4 · mesa 41 |
| 3 mar 2021 | Del Valle Rosas, Alfonso (DELVALLEOF | Ver la partida 1-0 | -Martinez Otero, Carlos (omc40) | D00 Queen's Pawn Game: Accelerated London System | | ronda 4 · mesa 42 |
| 3 mar 2021 | Suarez Montousse, Andres (andresmonto | Ver la partida 0-1 | -Ortiz Fernandez De La Vega, Alejandro Manuel (s | A45 Trompowsky Attack | | ronda 4 · mesa 43 |
| 3 mar 2021 | Ortiz Fernandez De La Vega, Alejandro Manuel (s | Ver la partida 1-0 | -Suarez Montousse, Andres (andresmonto | B06 Modern Defense | | ronda 4 · mesa 44 |
| 3 mar 2021 | Suarez Prendes, Rufino (pezapo) | Ver la partida 0-1 | -Baragano Campa, David (ebwjes) | C02 French Defense: Advance Variation, Milner-Barry Gambit, Main Line | Valdesva – Ciudad Naranco A | ronda 4 · mesa 45 |
| 3 mar 2021 | Baragano Campa, David (ebwjes) | Ver la partida 1-0 | -Suarez Prendes, Rufino (pezapo) | B03 Alekhine Defense: Exchange Variation | Valdesva – Ciudad Naranco A | ronda 4 · mesa 46 |
| 3 mar 2021 | Gonzalez Menendez, Ivan (StarkAst) | Ver la partida 1-0 | -Bazan Solera, Manuel (bazan55) | B07 Pirc Defense: Byrne Variation | Vetusta A – Universidad de Oviedo A | ronda 4 · mesa 47 |
| 3 mar 2021 | Bazan Solera, Manuel (bazan55) | Ver la partida 0-1 | -Gonzalez Menendez, Ivan (StarkAst) | A00 Hungarian Opening | Vetusta A – Universidad de Oviedo A | ronda 4 · mesa 48 |
| 3 mar 2021 | Arias Torio, Sergio (Torpinson) | Ver la partida ½-½ | -Garcia Cueva, Miguel (Megamiguelm | D14 Slav Defense: Exchange Variation, Symmetrical Line | | ronda 4 · mesa 49 |
| 3 mar 2021 | Garcia Cueva, Miguel (Megamiguelm | Ver la partida 0-1 | -Arias Torio, Sergio (Torpinson) | B35 Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation | | ronda 4 · mesa 50 |
| 3 mar 2021 | Caso De Los Cobos Martinez, Guillermo Emilio (G | Ver la partida 1-0 | -Riera Serna, Pau Lai (Paucaballi | A36 English Opening: Symmetrical Variation, Ultra-Symmetrical Variation | | ronda 4 · mesa 51 |
| 3 mar 2021 | Riera Serna, Pau Lai (Paucaballi | Ver la partida 0-1 | -Caso De Los Cobos Martinez, Guillermo Emilio (G | C00 French Defense: Knight Variation | | ronda 4 · mesa 52 |
| 3 mar 2021 | Gonzalez Fernandez, Alicia (Alikigonfer | Ver la partida 1-0 | -Fernandez Artime, Jorge (Jorgefa7) | B01 Scandinavian Defense: Main Line | | ronda 4 · mesa 53 |
| 3 mar 2021 | Fernandez Artime, Jorge (Jorgefa7) | Ver la partida 0-1 | -Gonzalez Fernandez, Alicia (alikigonfer | B01 Scandinavian Defense | | ronda 4 · mesa 54 |
| 3 mar 2021 | Martin Fernandez, Ismael (aviles2jr2) | Ver la partida 0-1 | -Arce Cano, Nicolas (narce4) | C01 French Defense: Exchange Variation | Vetusta D – Ciudad Naranco B | ronda 4 · mesa 55 |
| 3 mar 2021 | Arce Cano, Nicolas (narce4) | Ver la partida 0-1 | -Martin Fernandez, Ismael (aviles2jr2) | D06 Queen's Gambit Declined: Marshall Defense | Vetusta D – Ciudad Naranco B | ronda 4 · mesa 56 |
| 3 mar 2021 | Alvarez Sanchez, Mauro (Maurocraft) | Ver la partida 1-0 | -Gonzalez Guerra, Xicu (Xicugg2009) | B32 Sicilian Defense: Open | Ensidesa B – Peon Escarlata | ronda 4 · mesa 57 |
| 3 mar 2021 | Gonzalez Guerra, Xicu (Xicugg2009) | Ver la partida 0-1 | -Alvarez Sanchez, Mauro (Maurocraft) | D55 Queen's Gambit Declined: Modern Variation, Normal Line | Ensidesa B – Peon Escarlata | ronda 4 · mesa 58 |
| 3 mar 2021 | Gonzalez Fernandez, Silvia (Silvia99999 | Ver la partida 1-0 | -Candanedo Moral, Enrique (E_CanMora) | C77 Ruy Lopez: Morphy Defense, Tarrasch Variation | | ronda 4 · mesa 59 |
| 3 mar 2021 | Candanedo Moral, Enrique (E_CanMora) | Ver la partida 0-1 | -Gonzalez Fernandez, Silvia (Silvia99999 | B01 Scandinavian Defense: Main Line | | ronda 4 · mesa 60 |
| 3 mar 2021 | Poblet Bulnes, Oscar (oscarpbov43) | Ver la partida 1-0 | -Muniz Otero, Lucas (CANTERA1) | C50 Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | Vetusta D – Ciudad Naranco B | ronda 4 · mesa 61 |
| 3 mar 2021 | Muniz Otero, Lucas (CANTERA1) | Ver la partida 0-1 | -Poblet Bulnes, Oscar (oscarpbov43) | B23 Sicilian Defense: Grand Prix Attack | Vetusta D – Ciudad Naranco B | ronda 4 · mesa 62 |
| 3 mar 2021 | Camacho Barreiro, Iker (Capanegra2222 | Ver la partida 1-0 | -Villahoz Rodriguez, Carlos (Carcode) | C42 Petrov's Defense | | ronda 4 · mesa 63 |
| 3 mar 2021 | Villahoz Rodriguez, Carlos (Carcode) | Ver la partida 1-0 | -Camacho Barreiro, Iker (Capanegra2222 | C29 Vienna Game: Vienna Gambit | | ronda 4 · mesa 64 |
| 3 mar 2021 | Fidalgo Fernandez, Lucia (Lucifidi) | Ver la partida 1-0 | -Siscar Conill, Aitor (siscar2006) | D03 Queen's Pawn Game: Torre Attack | Grupo Covadonga – Vetusta B | ronda 4 · mesa 65 |
| 3 mar 2021 | Siscar Conill, Aitor (siscar2006) | Ver la partida 0-1 | -Fidalgo Fernandez, Lucia (Lucifidi) | B52 Sicilian Defense: Moscow Variation, Main Line | Grupo Covadonga – Vetusta B | ronda 4 · mesa 66 |
| 3 mar 2021 | Lanza Garcia, Miguel Angel (mianl | Ver la partida 0-1 | -Rodriguez Uria, Julio Antonio (esla | B16 Caro-Kann Defense: Bronstein-Larsen Variation | | ronda 4 · mesa 67 |
| 3 mar 2021 | Rodriguez Uria, Julio Antonio (esla | Ver la partida 1-0 | -Lanza Garcia, Miguel Angel (mianl | A27 English Opening: King's English Variation, Three Knights System | | ronda 4 · mesa 68 |
| 3 mar 2021 | Ardura Fernandez, Miguel Angel (MaikT | Ver la partida 0-1 | -Rodriguez Suarez, Lorena (lorenarguez | C51 Italian Game: Evans Gambit, Anderssen Variation | | ronda 4 · mesa 69 |
| 3 mar 2021 | Rodriguez Suarez, Lorena (lorenarguez | Ver la partida 1-0 | -Ardura Fernandez, Miguel Angel (MaikT | B76 Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line | | ronda 4 · mesa 70 |
| 3 mar 2021 | Alvarez Fernandez, Jose Manuel (fdezal | Ver la partida 0-1 | -Vergara Anton, Diego (PavlenkaWall | C01 French Defense: Exchange Variation | | ronda 4 · mesa 71 |
| 3 mar 2021 | Vergara Anton, Diego (PavlenkaWall | Ver la partida 1-0 | -Alvarez Fernandez, Jose Manuel (fdezal | D05 Queen's Pawn Game: Colle System | | ronda 4 · mesa 72 |
| 10 mar 2021 | Gonzalez Guedes, Iyan (IyanBuho) | Ver la partida 0-1 | -Vinuela Diaz, Saul (SwordOfTinabi | B50 Sicilian Defense: Delayed Alapin Variation, with d6 | | ronda 5 · mesa 1 |
| 10 mar 2021 | Vinuela Diaz, Saul (SwordOfTinabi | Ver la partida 0-1 | -Gonzalez Guedes, Iyan (IyanBuho) | A45 Indian Defense: Accelerated London System | | ronda 5 · mesa 2 |
| 10 mar 2021 | Delgado Ramirez, Neuris (neurisdr) | Ver la partida 1-0 | -Sanchez Vergara, Alberto (albertsanc | B50 Sicilian Defense: Modern Variations | | ronda 5 · mesa 3 |
| 10 mar 2021 | Sanchez Vergara, Alberto (albertsanc | Ver la partida 0-1 | -Delgado Ramirez, Neuris (neurisdr) | B60 Sicilian Defense: Richter-Rauzer Variation | | ronda 5 · mesa 4 |