| Feb 14, 2026 | Koch | 0–1 | Acosta | Round 2: Koch, Juan - Acosta, Pablo Ismael | Sicilian Defense: Keres Variation | |
| Nov 24, 2025 | Ponti | 0–1 | Koch | Round 7: Ponti, Enrique - Koch, Juan | English Opening: Agincourt Defense | |
| Nov 23, 2025 | Koch | ½–½ | Cranbourne | Round 6: Koch, Juan - Cranbourne, Carlos | Sicilian Defense: French Variation, Normal | |
| Nov 23, 2025 | Garcia | ½–½ | Koch | Round 5: Garcia, Juan Domingo - Koch, Juan | Indian Defense: Knights Variation | |
| Nov 22, 2025 | Koch | 1–0 | Lo Presti | Round 4: Koch, Juan - Lo Presti, Roberto | Catalan Opening: Open Defense, Classical Line | |
| Nov 22, 2025 | Lopez | 0–1 | Koch | Round 3: Lopez, Ricardo - Koch, Juan | Queen's Gambit Declined: Neo-Orthodox Variation, Main Line | |
| Nov 21, 2025 | Koch | ½–½ | Aguila | Campeonato Argentino Seniors - Supra 65 | English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense | |
| Nov 21, 2025 | Santiso | 0–1 | Koch | Campeonato Argentino Seniors - Supra 65 | Zukertort Opening: Sicilian Invitation | |
| Nov 11, 2025 | Koch | 1–0 | Lopez Condori | XXXII Abierto Internacional ProAm Main Events FIDE. $15.000.000 en premios | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Nov 10, 2025 | Brignoccoli | 1–0 | Koch | XXXII Abierto Internacional ProAm Main Events FIDE. $15.000.000 en premios | Ruy Lopez: Morphy Defense, Wormald Attack | |
| Nov 9, 2025 | Adam | 1–0 | Koch | XXXII Abierto Internacional ProAm Main Events FIDE. $15.000.000 en premios | French Defense: Advance Variation, Wade Variation | |
| Nov 8, 2025 | Koch | ½–½ | Asprelli | XXXII Abierto Internacional ProAm Main Events FIDE. $15.000.000 en premios | English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense | |
| Nov 7, 2025 | Alvarez | 0–1 | Koch | XXXII Abierto Internacional ProAm Main Events FIDE. $15.000.000 en premios | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Nov 6, 2025 | Koch | ½–½ | Bayinay | XXXII Abierto Internacional ProAm Main Events FIDE. $15.000.000 en premios | Queen's Gambit Declined: Three Knights Variation | |
| Nov 5, 2025 | Koch | 0–1 | Varela Velazquez | XXXII Abierto Internacional ProAm Main Events FIDE. $15.000.000 en premios | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Nov 3, 2025 | Rodas | 0–1 | Koch | XXXII Abierto Internacional ProAm Main Events FIDE. $15.000.000 en premios | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Apr 2, 2025 | Koch | 0–1 | Schnaider | III Abierto Internacional de FAOGBA 2 al | English Opening: Caro-Kann Defensive System | |
| Jun 1, 2024 | Koch | 0–1 | Slipak | Round 1: Koch, Juan - Slipak, Sergio | English Opening: Neo-Catalan | |
| Jun 18, 2023 | Koch | 0–1 | Ccahuancama | MASTER CIUDAD DE BUENOS AIRES - Club Ar | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| Jun 17, 2023 | Axarlian | 1–0 | Koch | MASTER CIUDAD DE BUENOS AIRES - Club Arg | Ruy Lopez: Berlin Defense | |
| Jun 16, 2023 | Koch | 1–0 | Saliba | MASTER CIUDAD DE BUENOS AIRES - Club Ar | English Opening: Caro-Kann Defensive System | |
| Jun 15, 2023 | Unhold | 1–0 | Koch | MASTER CIUDAD DE BUENOS AIRES - Club Arg | Nimzo-Larsen Attack: Classical Variation | |
| Jun 14, 2023 | Koch | 1–0 | Hernandez Figueroa | MASTER CIUDAD DE BUENOS AIRES - Club Arg | English Opening: King's English Variation | |
