| Jun 10, 2026 | Fier | ½–½ | Mareco | Round 11: Fier, Alexandr - Mareco, Sandro | Four Knights Game: Spanish Variation | |
| Jun 8, 2026 | Mareco | 1–0 | Jimenez Garcia | Round 9: Mareco, Sandro - Jimenez Garcia, Emmanuel | Catalan Opening | |
| Jun 7, 2026 | Diaz Perez | 0–1 | Mareco | Round 8: Diaz Perez, Michel Alejandro - Mareco, Sandro | Semi-Slav Defense: Normal Variation | |
| Jun 6, 2026 | Mareco | ½–½ | Berdayes Ason | Round 7: Mareco, Sandro - Berdayes Ason, Dylan Isidro | Queen's Gambit Declined: Ragozin Defense | |
| Jun 5, 2026 | Lopez Rayo | ½–½ | Mareco | Round 6: Lopez Rayo, Santiago - Mareco, Sandro | Ruy Lopez: Closed, Martinez Variation | |
| Jun 5, 2026 | Mareco | 1–0 | Delgado Romero | Round 5: Mareco, Sandro - Delgado Romero, Marco | Benoni Defense: Classical Variation, New York Variation | |
| Jun 4, 2026 | Baules Rodriguez | 0–1 | Mareco | Round 4: Baules Rodriguez, Jorge Luis - Mareco, Sandro | Bogo-Indian Defense: Wade-Smyslov Variation | |
| Jun 4, 2026 | Mareco | 0–1 | Rios Gomez | Round 3: Mareco, Sandro - Rios Gomez, Cristhian Camilo | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jun 4, 2026 | Mareco | 1–0 | Monroy Lopez | Round 1: Mareco, Sandro - Monroy Lopez, Gustavo Adolfo | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 3, 2026 | Torres Rosas | 0–1 | Mareco | Round 2: Torres Rosas, Luis Carlos - Mareco, Sandro | King's Indian Defense: Orthodox Variation | |
| Jun 2, 2026 | Mareco | ½–½ | Shankland | Round 10: Mareco, Sandro - Shankland, Sam | Italian Game: Giuoco Pianissimo, Normal | |
| Dec 15, 2025 | Slipak | 0–1 | Mareco | Round 8: Slipak, Sergio - Mareco, Sandro | Semi-Slav Defense | |
| Dec 14, 2025 | Mareco | ½–½ | Shirov | Round 7: Mareco, Sandro - Shirov, Alexei | Catalan Opening: Open Defense | |
| Dec 13, 2025 | Oro | ½–½ | Mareco | Round 6: Oro, Faustino - Mareco, Sandro | Ruy Lopez: Closed, Anti-Marshall | |
| Dec 13, 2025 | Flores | 0–1 | Mareco | Round 11: Flores, Diego - Mareco, Sandro | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Dec 13, 2025 | Shirov | ½–½ | Mareco | Round 10: Shirov, Alexei - Mareco, Sandro | Ruy Lopez: Closed, Flohr System | |
| Dec 13, 2025 | Mareco | 1–0 | Granda Zuniga | Round 9: Mareco, Sandro - Granda Zuniga, Julio E | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 13, 2025 | Silva | 1–0 | Mareco | Round 8: Silva, Luca - Mareco, Sandro | Indian Defense: Anti-Nimzo-Indian | |
| Dec 13, 2025 | Mareco | 1–0 | Tempone | Round 7: Mareco, Sandro - Tempone, Marcelo | Petrov's Defense | |
| Dec 13, 2025 | Carcamo | 0–1 | Mareco | Round 6: Carcamo, Matias - Mareco, Sandro | Sicilian Defense: Closed | |
| Dec 12, 2025 | Della Morte | 0–1 | Mareco | Round 4: Della Morte, German - Mareco, Sandro | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 12, 2025 | Mareco | 1–0 | Benedetti | Round 3: Mareco, Sandro - Benedetti, Julio | King's Indian Defense: Orthodox Variation | |
| Dec 12, 2025 | De Dovitiis | 0–1 | Mareco | Round 2: De Dovitiis, Alejo - Mareco, Sandro | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| Dec 12, 2025 | Mareco | 1–0 | Bursztyn | Round 1: Mareco, Sandro - Bursztyn, Ioshua | Catalan Opening | |
| Dec 12, 2025 | Mareco | ½–½ | Darcyl | Round 5: Mareco, Sandro - Darcyl, Tomas | English Opening: King's English Variation, Three Knights System | |
| Dec 11, 2025 | Mareco | 0–1 | Tari | Round 5: Mareco, Sandro - Tari, Aryan | English Opening: Symmetrical Variation | |
| Dec 11, 2025 | Schnaider | 1–0 | Mareco | Round 4: Schnaider, Ilan - Mareco, Sandro | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Dec 10, 2025 | Mareco | 0–1 | Flores | Round 3: Mareco, Sandro - Flores, Diego | Sicilian Defense: Kan Variation, Modern Variation | |
| Dec 9, 2025 | Granda Zuniga | ½–½ | Mareco | Round 2: Granda Zuniga, Julio E - Mareco, Sandro | Nimzo-Indian Defense: Normal Variation, Ragozin Variation | |
| Dec 8, 2025 | Mareco | ½–½ | Cheparinov | Round 1: Mareco, Sandro - Cheparinov, Ivan | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Dec 6, 2025 | Mareco | ½–½ | Tari | Round 9: Mareco, Sandro - Tari, Aryan | Catalan Opening: Open Defense, Modern Sharp Variation | |
| Nov 14, 2025 | Oro | ½–½ | Mareco | Round 6: Oro, Faustino - Mareco, Sandro | Nimzo-Indian Defense: Normal Variation, Schlechter Defense | |
| Nov 14, 2025 | Mareco | 0–1 | Oro | Round 5: Mareco, Sandro - Oro, Faustino | Catalan Opening: Open Defense, Classical Line | |
| Nov 14, 2025 | Oro | ½–½ | Mareco | Round 4: Oro, Faustino - Mareco, Sandro | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Nov 14, 2025 | Mareco | ½–½ | Oro | Round 3: Mareco, Sandro - Oro, Faustino | Catalan Opening: Closed | |
| Nov 14, 2025 | Oro | ½–½ | Mareco | Round 2: Oro, Faustino - Mareco, Sandro | Ruy Lopez: Closed, Martinez Variation | |
| Nov 14, 2025 | Mareco | ½–½ | Oro | Round 1: Mareco, Sandro - Oro, Faustino | Catalan Opening: Open Defense, Classical Line | |
| Oct 20, 2025 | Mareco | 1–0 | Di Berardino | Round 9: Mareco, Sandro - Di Berardino, Diego Rafael | English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense | |
| Oct 20, 2025 | Gomez | 0–1 | Mareco | Round 8: Gomez, Carlos David - Mareco, Sandro | Ruy Lopez: Closed, Flohr System | |
| Oct 20, 2025 | Mareco | * | Silva | Round 7: Mareco, Sandro - Silva, Caio Henrique Angelico | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Oct 20, 2025 | Flores Quillas | ½–½ | Mareco | Round 6: Flores Quillas, Diego Saul Rodri - Mareco, Sandro | Ruy Lopez: Closed | |
| Oct 20, 2025 | Mareco | ½–½ | Ticona Rocabado | Round 5: Mareco, Sandro - Ticona Rocabado, Licael Roderick | English Opening: Symmetrical Variation | |
| Oct 20, 2025 | Hoffman | 1–0 | Mareco | Round 4: Hoffman, Alejandro - Mareco, Sandro | Zukertort Opening: Sicilian Invitation | |
| Oct 20, 2025 | Cubas | ½–½ | Mareco | Round 3: Cubas, Jose - Mareco, Sandro | Caro-Kann Defense: Tartakower Variation | |
| Oct 20, 2025 | Mareco | 1–0 | Casalaspro | Round 2: Mareco, Sandro - Casalaspro, Mathias Andre | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Oct 20, 2025 | Filgueiras | 1–0 | Mareco | Round 1: Filgueiras, Nathan Felipe - Mareco, Sandro | Four Knights Game | |
| Jul 6, 2025 | Mareco | 1–0 | Soriano Quispe | Round 9: Mareco, Sandro - Soriano Quispe, Ivan Excender | English Opening: Agincourt Defense | |
| Jul 5, 2025 | Silva | ½–½ | Mareco | Round 8: Silva, Kaua Marques - Mareco, Sandro | Sicilian Defense: Scheveningen Variation, Classical Variation | |
| Jul 4, 2025 | Mareco | ½–½ | Strikovic | Round 7: Mareco, Sandro - Strikovic, Aleksa | Pirc Defense | |
| Jul 2, 2025 | Mareco | 1–0 | Umetsubo | Round 5: Mareco, Sandro - Umetsubo, Cesar Hidemitsu | Petrov's Defense: Classical Attack, Mason-Showalter Variation | |
| Jul 1, 2025 | Hoffman | 0–1 | Mareco | Round 4: Hoffman, Alejandro - Mareco, Sandro | Benoni Defense: Fianchetto Variation | |
| Jun 29, 2025 | Mareco | ½–½ | Figueroa | Round 1: Mareco, Sandro - Figueroa, Matias Alejandro | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Jun 27, 2025 | Do Valle Cardoso | ½–½ | Mareco | Round 6: Do Valle Cardoso, Lucas - Mareco, Sandro | Philidor Defense: Lion Variation | |
| May 31, 2025 | Panjwani | ½–½ | Mareco | Round 11: Panjwani, Raja - Mareco, Sandro | Nimzo-Indian Defense: St. Petersburg Variation | |
| May 30, 2025 | Mareco | ½–½ | Avila Pavas | Round 10: Mareco, Sandro - Avila Pavas, Santiago | King's Indian Attack: Keres Variation | |
| May 29, 2025 | Campos Gomez | ½–½ | Mareco | Round 9: Campos Gomez, Manuel - Mareco, Sandro | Bogo-Indian Defense: Retreat Variation | |
| May 28, 2025 | Mareco | 1–0 | Ynojosa Aponte | Round 8: Mareco, Sandro - Ynojosa Aponte, Felix Jose | Queen's Indian Defense: Fianchetto Variation, Sämisch Variation | |
| May 27, 2025 | Schnaider | ½–½ | Mareco | Round 7: Schnaider, Ilan - Mareco, Sandro | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| May 26, 2025 | Mareco | 1–0 | Contreras Huaman | Round 6: Mareco, Sandro - Contreras Huaman, Fiorella | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| May 26, 2025 | Valdes Escobar | ½–½ | Mareco | Round 5: Valdes Escobar, Alvaro - Mareco, Sandro | Four Knights Game: Scotch Variation Accepted | |
| May 24, 2025 | Filgueiras | 1–0 | Mareco | Round 3: Filgueiras, Nathan Felipe - Mareco, Sandro | Sicilian Defense: Najdorf Variation | |
| May 24, 2025 | Mareco | 1–0 | Rodrigues | Round 2: Mareco, Sandro - Rodrigues, Edgar | King's Indian Attack: Symmetrical Defense | |
| May 23, 2025 | Carcamo | 0–1 | Mareco | Round 1: Carcamo, Matias - Mareco, Sandro | Sicilian Defense: Closed | |
| Apr 19, 2025 | Mareco | 1–0 | Cori Quispe | Ronda 9: Mareco, Sandro - Cori Quispe, Kevin Joel | English Opening: Neo-Catalan | |
| Apr 18, 2025 | Fernandez Hernandez | 0–1 | Mareco | Ronda 7: Fernandez Hernandez, Arturo A. - Mareco, Sandro | Queen's Gambit Declined: Three Knights Variation | |
| Apr 18, 2025 | Martinez Alcantara | ½–½ | Mareco | Ronda 8: Martinez Alcantara, Jose Eduardo - Mareco, Sandro | Ruy Lopez: Morphy Defense, Tarrasch Variation | |
| Apr 17, 2025 | Mareco | 1–0 | Montes Orozco | Ronda 5: Mareco, Sandro - Montes Orozco, Miguel Angel | King's Indian Attack | |
| Apr 17, 2025 | Mareco | ½–½ | Cori | Ronda 6: Mareco, Sandro - Cori, Jorge | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| Apr 16, 2025 | Mareco | 1–0 | Lopez Michelone | Ronda 3: Mareco, Sandro - Lopez Michelone, Manuel | Scandinavian Defense: Bronstein Variation | |
| Apr 16, 2025 | Real Pereyra | 0–1 | Mareco | Ronda 4: Real Pereyra, Jeronimo - Mareco, Sandro | Sicilian Defense: French Variation | |
| Apr 14, 2025 | Morlett Ovalle | 1–0 | Mareco | Ronda 1: Morlett Ovalle, Cris Sebastian - Mareco, Sandro | Queen's Pawn Game: London System | |
| Apr 6, 2025 | Mareco | 1–0 | Diaz Hollemaert | III Abierto Internacional de FAOGBA 2 al | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Apr 5, 2025 | Rodriguez Vila | ½–½ | Mareco | III Abierto Internacional de FAOGBA 2 al | Italian Game: Giuoco Piano | |
| Apr 4, 2025 | Mareco | 1–0 | Coro | III Abierto Internacional de FAOGBA 2 al | King's Indian Defense: Fianchetto Variation, Larsen Defense | |
| Apr 2, 2025 | Mareco | 1–0 | Brizzi | III Abierto Internacional de FAOGBA Ciudades de Luján y General Rodríguez | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Apr 2, 2025 | Mareco | 1–0 | Coro | III Abierto Internacional de FAOGBA Ciudades de Luján y General Rodríguez | King's Indian Defense: Fianchetto Variation, Larsen Defense | |
| Apr 2, 2025 | Mareco | 0–1 | Quintiliano | III Abierto Internacional de FAOGBA Ciudades de Luján y General Rodríguez | Rubinstein Opening: Bogoljubow Defense | |
| Apr 2, 2025 | Mareco | 1–0 | Diaz Hollemaert | III Abierto Internacional de FAOGBA Ciudades de Luján y General Rodríguez | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Apr 2, 2025 | Gutierrez | 0–1 | Mareco | III Abierto Internacional de FAOGBA Ciudades de Luján y General Rodríguez | Polish Opening: Outflank Variation | |
| Apr 2, 2025 | Silva | 0–1 | Mareco | III Abierto Internacional de FAOGBA Ciudades de Luján y General Rodríguez | Indian Defense: Anti-Nimzo-Indian | |
| Apr 2, 2025 | Rodriguez Vila | ½–½ | Mareco | III Abierto Internacional de FAOGBA Ciudades de Luján y General Rodríguez | Italian Game: Giuoco Piano | |
| Apr 2, 2025 | Cuenca Jimenez | ½–½ | Mareco | III Abierto Internacional de FAOGBA Ciudades de Luján y General Rodríguez | Nimzo-Indian Defense: Classical Variation | |
| Apr 2, 2025 | Flores | ½–½ | Mareco | III Abierto Internacional de FAOGBA Ciudades de Luján y General Rodríguez | English Opening: King's English Variation | |
| Mar 24, 2025 | Mareco | 1–0 | Diaz Hollemaert | Round 11: Mareco, Sandro - Diaz Hollemaert, Nahuel | Modern Defense | |
| Mar 24, 2025 | Cuenca Jimenez | 0–1 | Mareco | Round 10: Cuenca Jimenez, Jose Fernando - Mareco, Sandro | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Mar 24, 2025 | Mareco | 1–0 | Vazquez | Round 9: Mareco, Sandro - Vazquez, Facundo | King's Indian Attack | |
| Mar 22, 2025 | Mareco | 1–0 | Flores | Round 6: Mareco, Sandro - Flores, Diego | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Mar 22, 2025 | Perez Ponsa | 0–1 | Mareco | Round 5: Perez Ponsa, Federico - Mareco, Sandro | Four Knights Game: Spanish Variation | |
| Mar 22, 2025 | Izquierdo | 0–1 | Mareco | Round 4: Izquierdo, Daniel - Mareco, Sandro | Indian Defense: Anti-Nimzo-Indian | |
| Mar 22, 2025 | Mareco | ½–½ | Hungaski | Round 3: Mareco, Sandro - Hungaski, Robert | Kangaroo Defense | |
| Mar 22, 2025 | Fiori | 0–1 | Mareco | Round 2: Fiori, Hector - Mareco, Sandro | Caro-Kann Defense: Exchange Variation | |
| Mar 22, 2025 | Mareco | 1–0 | Ramos | Round 1: Mareco, Sandro - Ramos, Gabriel | Sicilian Defense: Hyperaccelerated Dragon | |
| Mar 21, 2025 | Oro | 1–0 | Mareco | Round 13: Oro, Faustino - Mareco, Sandro | King's Indian Attack | |
| Mar 21, 2025 | Mareco | 1–0 | Flores | Round 12: Mareco, Sandro - Flores, Diego | Sicilian Defense: Kan Variation, Wing Attack, Fianchetto Variation | |
| Mar 21, 2025 | Coppola | 0–1 | Mareco | Round 10: Coppola, Claudio - Mareco, Sandro | Nimzo-Larsen Attack: Classical Variation | |
| Mar 21, 2025 | Mareco | 1–0 | Dominguez | Round 9: Mareco, Sandro - Dominguez, Facundo | Sicilian Defense: French Variation, Normal | |
| Mar 21, 2025 | Diaz Hollemaert | ½–½ | Mareco | Round 8: Diaz Hollemaert, Nahuel - Mareco, Sandro | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Mar 21, 2025 | Mareco | 1–0 | Fiori | Round 7: Mareco, Sandro - Fiori, Hector | English Opening: Agincourt Defense | |
| Mar 21, 2025 | Bustelo | 0–1 | Mareco | Round 6: Bustelo, Tabare - Mareco, Sandro | Trompowsky Attack | |
| Mar 21, 2025 | Galaviz Medina | 1–0 | Mareco | Round 4: Galaviz Medina, Sion Radamantys - Mareco, Sandro | Nimzo-Indian Defense: Sämisch Variation, O'Kelly Variation | |