| Apr 1, 2026 | Markzon | 0–1 | Kevlishvili | Round 1: Markzon, Gregory - Kevlishvili, Robby | English Opening: Agincourt Defense | |
| Nov 1, 2025 | Zapata | 1–0 | Markzon | Round 11: Zapata, Alonso - Markzon, Gregory | French Defense: Tarrasch Variation, Guimard Defense, Main Line | |
| Oct 31, 2025 | Markzon | 1–0 | Vasilyev | Round 10: Markzon, Gregory - Vasilyev, Mikhail | Zukertort Opening: Dutch Variation | |
| Oct 30, 2025 | Pogorelov | 1–0 | Markzon | Round 9: Pogorelov, Ruslan - Markzon, Gregory | King's Indian Defense: Orthodox Variation, Glek Defense | |
| Oct 29, 2025 | Markzon | 1–0 | Ventura | Round 8: Markzon, Gregory - Ventura, Sergio | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Oct 28, 2025 | Chapman | 1–0 | Markzon | Round 7: Chapman, Terry P D - Markzon, Gregory | King's Indian Defense: Makogonov Variation | |
| Oct 26, 2025 | Markzon | ½–½ | Binham | Round 6: Markzon, Gregory - Binham, Timothy F. | King's Indian Attack | |
| Oct 25, 2025 | Kozlov | ½–½ | Markzon | Round 5: Kozlov, Oleg - Markzon, Gregory | Zukertort Opening: Nimzo-Larsen Variation | |
| Oct 24, 2025 | Markzon | 1–0 | Evertsson | Round 4: Markzon, Gregory - Evertsson, Rune | Zukertort Opening: Sicilian Invitation | |
| Oct 23, 2025 | Van Riemsdijk | 1–0 | Markzon | Round 3: Van Riemsdijk, Herman C. - Markzon, Gregory | Sicilian Defense: Najdorf Variation, Lipnitsky Attack | |
| Oct 22, 2025 | Markzon | 1–0 | Nasybullin | Round 2: Markzon, Gregory - Nasybullin, Vladislav | Caro-Kann Defense: Tartakower Variation | |
| Oct 21, 2025 | Adler | 0–1 | Markzon | Round 1: Adler, Doron - Markzon, Gregory | English Opening: Anglo-Indian Defense, Queen's Knight Variation | |
| May 23, 2025 | Fier | 1–0 | Markzon | Round 1: Fier, Alexandr - Markzon, Gregory | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Nov 24, 2024 | Markzon | 0–1 | Hugentobler | World Senior Chess Championship 2024 | Bogo-Indian Defense: Retreat Variation | |
| Nov 22, 2024 | Ftacnik | 1–0 | Markzon | World Senior Chess Championship 2024 | Grünfeld Defense: Exchange Variation, Spassky Variation | |
| Nov 21, 2024 | Markzon | 1–0 | Chapman | World Senior Chess Championship 2024 | Nimzo-Indian Defense: Sämisch Variation | |
| Nov 20, 2024 | Legky | ½–½ | Markzon | World Senior Chess Championship 2024 | Sicilian Defense: Moscow Variation | |
| Nov 19, 2024 | Markzon | ½–½ | Rivera | World Senior Chess Championship 2024 | King's Indian Defense: Orthodox Variation | |
| Nov 18, 2024 | Markzon | 1–0 | Vatter | World Senior Chess Championship 2024 | Nimzo-Indian Defense: Three Knights Variation | |
| Jun 2, 2024 | Ynojosa Aponte | 1–0 | Markzon | Round 11: Ynojosa Aponte, Felix Jose - Markzon, Gregory | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Jun 2, 2024 | Tamayo Tobon | 0–1 | Andres Alvarez Vargas | Round 9: Tamayo Tobon, Michael - Andres Alvarez Vargas | English Opening: Symmetrical Variation, Botvinnik System | |
| Jun 2, 2024 | Andres Alvarez Vargas | 0–1 | Mendoza Gomez Juana Fernanda | Round 8: Andres Alvarez Vargas - Mendoza Gomez Juana Fernanda | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jun 2, 2024 | Oseguera | 0–1 | Andres Alvarez Vargas | Round 7: Oseguera, Suhey - Andres Alvarez Vargas | French Defense: Chigorin Variation | |
| Jun 1, 2024 | Andres Alvarez Vargas | 0–1 | Leal Escamilla | Round 6: Andres Alvarez Vargas - Leal Escamilla, Daniel Zinedine | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jun 1, 2024 | Casas Mejia | ½–½ | Andres Alvarez Vargas | Round 5: Casas Mejia, Santiago - Andres Alvarez Vargas | King's Indian Defense: Four Pawns Attack | |
| Jun 1, 2024 | Andres Alvarez Vargas | 0–1 | Pardo Pebes | Round 4: Andres Alvarez Vargas - Pardo Pebes, Sergio Branco | King's Indian Defense: Normal Variation, King's Knight Variation | |
| Jun 1, 2024 | Negron Lizarazo | 1–0 | Andres Alvarez Vargas | Round 3: Negron Lizarazo, Juan Sebastian - Andres Alvarez Vargas | French Defense: Advance Variation | |
| Jun 1, 2024 | Andres Alvarez Vargas | 1–0 | Fernandez Suarez | Round 2: Andres Alvarez Vargas - Fernandez Suarez, Nelson Ivan | Queen's Gambit Declined | |
| Jun 1, 2024 | Tobar B | 1–0 | Andres Alvarez Vargas | Round 1: Tobar B, Carlos Andres - Andres Alvarez Vargas | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| May 31, 2024 | Markzon | 1–0 | Johnson | Round 10: Markzon, Gregory - Johnson, Joshua | Slav Defense: Quiet Variation, Schallopp Defense | |
| May 30, 2024 | Santos Flores | 0–1 | Markzon | Round 9: Santos Flores, Alberto - Markzon, Gregory | Sicilian Defense: Moscow Variation | |
| May 29, 2024 | Markzon | 1–0 | Bermudez | Round 8: Markzon, Gregory - Bermudez, Edilson Enrique | English Opening: Anglo-Indian Defense, Scandinavian Defense, Exchange Variation | |
| May 28, 2024 | Betaneli | ½–½ | Markzon | Round 7: Betaneli, Alexander - Markzon, Gregory | East Indian Defense | |
| May 27, 2024 | Markzon | 1–0 | Murcia Molina | Round 6: Markzon, Gregory - Murcia Molina, Manuel Hernando | English Opening: Neo-Catalan | |
| May 27, 2024 | Jacome Revelo | 0–1 | Markzon | Round 1: Jacome Revelo, Daniela Alexandra - Markzon, Gregory | Sicilian Defense: Moscow Variation | |
| May 27, 2024 | Markzon | 1–0 | Mejia Ospina | Round 4: Markzon, Gregory - Mejia Ospina, Juan F | King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System | |
| May 27, 2024 | Vasquez Toledo | 1–0 | Markzon | Round 3: Vasquez Toledo, Cristian - Markzon, Gregory | Sicilian Defense: Najdorf Variation, English Attack | |
| May 27, 2024 | Markzon | ½–½ | Munoz Triana | Round 2: Markzon, Gregory - Munoz Triana, Joseph Steve | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| May 27, 2024 | Francisco Guecamburu | 1–0 | Markzon | Round 5: Francisco Guecamburu, Candela Be - Markzon, Gregory | Rapport-Jobava System | |
| Mar 29, 2024 | Markzon | * | Morales Santos | 16 Annual Open at Foxwoods | ? | |
| Mar 31, 2023 | Rosen | 0–1 | Markzon | Reykjavik Open | Indian Defense | |
