| — | Kozak | ½–½ | Bogner | Schachbundesliga Runde 7 | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| — | Hertneck | 0–1 | Kozak | Schachbundesliga Runde 8 | Semi-Slav Defense | |
| Jun 30, 2026 | Jacobson | 1–0 | Kozak | Round 6: Jacobson, Brandon - Kozak, Adam | Queen's Indian Defense: Classical Variation | |
| Jun 28, 2026 | Kozak | 1–0 | Cesar Maestre | Round 5: Kozak, Adam - Cesar Maestre, Bernardo | Sicilian Defense: Closed | |
| Jun 28, 2026 | Garcia Romero | 0–1 | Kozak | Round 4: Garcia Romero, Benjamin Abel - Kozak, Adam | Catalan Opening: Open Defense | |
| Jun 27, 2026 | Kozak | 1–0 | Iwan | Round 3: Kozak, Adam - Iwan, Patryk | King's Indian Attack: Symmetrical Defense | |
| Jun 27, 2026 | Aishwin Daniel | ½–½ | Kozak | Round 2: Aishwin Daniel - Kozak, Adam | Italian Game: Classical Variation, Giuoco Pianissimo, Albin Variation | |
| Jun 27, 2026 | Kozak | 1–0 | Cesar Maestre | Round 1: Kozak, Adam - Cesar Maestre, Eduardo | English Opening: Anglo-Indian Defense, Queen's Indian Formation | |
| Jun 23, 2026 | Kozak | ½–½ | Antoniewski | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | King's Indian Defense: Orthodox Variation | |
| Jun 21, 2026 | Kozak | ½–½ | Malek | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jun 20, 2026 | Kozak | 1–0 | Sabuk | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jun 19, 2026 | Heberla | ½–½ | Kozak | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Jun 18, 2026 | Kantans | 0–1 | Kozak | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Scotch Game: Mieses Variation | |
| Jun 16, 2026 | Cieslak | 1–0 | Kozak | Druzynowe Mistrzostwa Polski - Ekstraliga 2026 | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| May 24, 2026 | Pultinevicius | 1–0 | Kozak | VII Coop Saaremaa Chess Festival Rapid | Zukertort Opening: Queenside Fianchetto Variation | |
| May 24, 2026 | Kozak | 1–0 | Rychagov | VII Coop Saaremaa Chess Festival Rapid | King's Indian Attack: Sicilian Variation | |
| May 24, 2026 | Shirov | 1–0 | Kozak | VII Coop Saaremaa Chess Festival Rapid | Indian Defense: Anti-Nimzo-Indian | |
| May 24, 2026 | Rogule | 0–1 | Kozak | VII Coop Saaremaa Chess Festival Rapid | Catalan Opening: Open Defense | |
| May 23, 2026 | Kozak | 0–1 | Fridman | VII Coop Saaremaa Chess Festival Rapid | Nimzo-Larsen Attack: Classical Variation | |
| May 23, 2026 | Kozak | 1–0 | Keinanen | VII Coop Saaremaa Chess Festival Rapid | Nimzo-Larsen Attack: Classical Variation | |
| May 23, 2026 | Bacrot | ½–½ | Kozak | VII Coop Saaremaa Chess Festival Rapid | Sicilian Defense: Moscow Variation, Main Line | |
| May 23, 2026 | Kozak | 1–0 | Dubrovin | VII Coop Saaremaa Chess Festival Rapid | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| May 23, 2026 | Krivenko | 0–1 | Kozak | VII Coop Saaremaa Chess Festival Rapid | Sicilian Defense: Chekhover Variation | |
| May 23, 2026 | Kozak | 1–0 | Barinova | VII Coop Saaremaa Chess Festival Rapid | Queen's Gambit Declined: Charousek Variation | |
| May 21, 2026 | Ponomariov | ½–½ | Kozak | VII Coop Saaremaa Chess Festival Rapid | Italian Game: Classical Variation, Giuoco Pianissimo | |
| May 10, 2026 | Kozak | ½–½ | Eljanov | Hungarian Superleague 2025/26 | Nimzo-Larsen Attack: Classical Variation | |
| May 9, 2026 | Mihok | ½–½ | Kozak | Hungarian Superleague 2025/26 | Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation | |
| May 8, 2026 | Kozak | ½–½ | Sarana | Hungarian Superleague 2025/26 | King's Indian Attack: Double Fianchetto | |
| Apr 19, 2026 | Vogel | 0–1 | Kozak | stveit | Queen's Indian Defense: Fianchetto Variation, Kramnik Variation | |
| Apr 18, 2026 | Kozak | ½–½ | Oberhofer | stveit | Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line | |
| Apr 17, 2026 | Kozak | ½–½ | Halvax | stveit | Nimzo-Larsen Attack: Classical Variation | |
| Apr 17, 2026 | Sankalp Gupta | 1–0 | Kozak | stveit | Sicilian Defense: Old Sicilian | |
| Apr 16, 2026 | Kozak | ½–½ | Parligras | stveit | Italian Game: Giuoco Pianissimo, Normal | |
| Apr 15, 2026 | Antal | ½–½ | Kozak | stveit | Four Knights Game: Scotch Variation Accepted | |
| Apr 6, 2026 | Kozak | ½–½ | Baasansuren | X Open Semana Santa 2026 - Grupo A | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Apr 5, 2026 | Griffith | 0–1 | Kozak | X Open Semana Santa 2026 - Grupo A | Sicilian Defense: Kan Variation, Wing Attack | |
| Apr 5, 2026 | Gan-Erdene | ½–½ | Kozak | X Open Semana Santa 2026 - Grupo A | Sicilian Defense: Classical Variation, Sozin Attack | |
| Apr 4, 2026 | Kozak | ½–½ | Bogdanov | X Open Semana Santa 2026 - Grupo A | Indian Defense: Normal Variation | |
| Apr 3, 2026 | Przybylski | ½–½ | Kozak | X Open Semana Santa 2026 - Grupo A | Ruy Lopez: Closed, Flohr System | |
| Apr 3, 2026 | Domingo Nunez | 0–1 | Kozak | X Open Semana Santa 2026 - Grupo A | ? | |
| Apr 2, 2026 | Kozak | 1–0 | Singh | X Open Semana Santa 2026 - Grupo A | Zukertort Opening: Nimzo-Larsen Variation | |
| Apr 2, 2026 | Bozinakis | 0–1 | Kozak | X Open Semana Santa 2026 - Grupo A | Ruy Lopez: Exchange Variation, Keres Variation | |
| Apr 1, 2026 | Kozak | 1–0 | Myrmus | X Open Semana Santa 2026 - Grupo A | King's Indian Attack: Symmetrical Defense | |
| Mar 29, 2026 | Kozak | ½–½ | Dotzer | Round 11: Kozak, Adam - Dotzer, Lukas | English Opening: Mikenas-Carls Variation | |
| Mar 28, 2026 | Van Foreest | 1–0 | Kozak | Round 10: Van Foreest, Jorden - Kozak, Adam | Italian Game: Giuoco Piano | |
| Mar 27, 2026 | Alekseenko | ½–½ | Kozak | Round 9: Alekseenko, Kirill - Kozak, Adam | Ruy Lopez: Berlin Defense, Anti-Berlin Variation | |
| Mar 23, 2026 | Hogyinszki | 1–0 | Kozak | Hungarian Youth Championship 2026, Boys | French Defense: Hecht-Reefschläger Variation | |
| Mar 7, 2026 | Kozak | 1–0 | Begmuratov | Budapest Spring Festival | King's Indian Attack: Symmetrical Defense | |
| Mar 6, 2026 | Kozak | 1–0 | Yordanov | Budapest Spring Festival | King's Indian Attack: Keres Variation | |
| Mar 5, 2026 | Lalit Babu M R | 1–0 | Kozak | Budapest Spring Festival | Bogo-Indian Defense: Exchange Variation | |
| Mar 4, 2026 | Kozak | 1–0 | Dehtiarov | Budapest Spring Festival | King's Indian Attack | |
| Mar 3, 2026 | Geher | 0–1 | Kozak | Budapest Spring Festival | Ruy Lopez: Closed, Martinez Variation | |
| Mar 2, 2026 | Kozak | 0–1 | Saydaliev | Budapest Spring Festival | Italian Game: Giuoco Pianissimo, Normal | |
| Mar 1, 2026 | Nguyen | 0–1 | Kozak | Budapest Spring Festival | English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation | |
| Feb 28, 2026 | Kozak | 1–0 | Shatil | Budapest Spring Festival | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Feb 27, 2026 | Senthil Maran K | ½–½ | Kozak | Budapest Spring Festival | King's Indian Attack, with e6 | |
| Feb 22, 2026 | Kozak | ½–½ | Dardha | Round 8: Kozak, Adam - Dardha, Daniel | Pirc Defense | |
| Feb 21, 2026 | Michalik | ½–½ | Kozak | Round 7: Michalik, Peter - Kozak, Adam | Four Knights Game: Spanish Variation, Classical Variation | |
| Feb 8, 2026 | Kempinski | ½–½ | Kozak | 1. BL Pauli | Queen's Indian Defense: Spassky System | |
| Feb 7, 2026 | Kozak | ½–½ | Nielsen | 1. BL Pauli | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Jan 11, 2026 | Ftacnik | ½–½ | Kozak | Round 6: Ftacnik, Lubomir - Kozak, Adam | English Opening: Symmetrical Variation | |
| Jan 10, 2026 | Kozak | 0–1 | Finek | Round 5: Kozak, Adam - Finek, Vaclav | Italian Game: Giuoco Pianissimo, Normal | |
| Dec 30, 2025 | Svane | 1–0 | Kozak | World Blitz 2025 Open | King's Indian Attack | |
| Dec 30, 2025 | Kozak | 1–0 | Dardha | World Blitz 2025 Open | Nimzo-Larsen Attack: Classical Variation | |
| Dec 30, 2025 | Ivanchuk | 1–0 | Kozak | World Blitz 2025 Open | Queen's Gambit Declined: Harrwitz Attack | |
| Dec 30, 2025 | Kozak | 1–0 | Kevlishvili | World Blitz 2025 Open | Nimzo-Larsen Attack: Classical Variation | |
| Dec 30, 2025 | Andreikin | 1–0 | Kozak | World Blitz 2025 Open | Four Knights Game: Scotch Variation Accepted | |
| Dec 30, 2025 | Kozak | 1–0 | Smirnov | World Blitz 2025 Open | Nimzo-Indian Defense: St. Petersburg Variation | |
| Dec 29, 2025 | Alekseenko | 1–0 | Kozak | World Blitz 2025 Open | Ruy Lopez: Berlin Defense | |
| Dec 29, 2025 | Kozak | 1–0 | Rakotomaharo | World Blitz 2025 Open | Nimzo-Larsen Attack: Classical Variation | |
| Dec 29, 2025 | Mamedov | 1–0 | Kozak | World Blitz 2025 Open | French Defense: Advance Variation, Euwe Variation | |
| Dec 29, 2025 | Kozak | 1–0 | Agmanov | World Blitz 2025 Open | Nimzo-Larsen Attack: Classical Variation | |
| Dec 29, 2025 | Nepomniachtchi | 1–0 | Kozak | World Blitz 2025 Open | Center Game: Berger Variation | |
| Dec 29, 2025 | Martinez Alcantara | 0–1 | Kozak | World Blitz 2025 Open | Four Knights Game: Spanish Variation, Janowski Variation | |
| Dec 29, 2025 | Kozak | ½–½ | Rapport | World Blitz 2025 Open | Zukertort Opening: Nimzo-Larsen Variation | |
| Dec 29, 2025 | Kuandykuly | 0–1 | Kozak | World Blitz 2025 Open | Bishop's Opening: Vienna Hybrid | |
| Dec 29, 2025 | Kozak | 0–1 | Narayanan S L | World Blitz 2025 Open | Zukertort Opening: Sicilian Invitation | |
| Dec 29, 2025 | AlJamaat | 0–1 | Kozak | World Blitz 2025 Open | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Dec 29, 2025 | Kozak | 0–1 | Murzin | World Blitz 2025 Open | Zukertort Opening: Nimzo-Larsen Variation | |
| Dec 28, 2025 | Blackwood | 0–1 | Kozak | World Blitz 2025 Open | Caro-Kann Defense: Exchange Variation | |
| Dec 28, 2025 | Oro | 0–1 | Kozak | WRBC 2025 Rapid Open | Ruy Lopez: Berlin Defense | |
| Dec 28, 2025 | Kozak | ½–½ | Movahed | WRBC 2025 Rapid Open | Indian Defense: Przepiorka Variation | |
| Dec 28, 2025 | Peyrer | 0–1 | Kozak | WRBC 2025 Rapid Open | Queen's Gambit Declined: Barmen Variation | |
| Dec 28, 2025 | Kozak | 0–1 | Dudin | WRBC 2025 Rapid Open | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Dec 27, 2025 | Madaminov | ½–½ | Kozak | WRBC 2025 Rapid Open | Ruy Lopez: Closed, Martinez Variation | |
| Dec 27, 2025 | Kozak | ½–½ | Ahmad | WRBC 2025 Rapid Open | Zukertort Opening: Sicilian Invitation | |
| Dec 27, 2025 | Adhiban | ½–½ | Kozak | WRBC 2025 Rapid Open | Queen's Indian Defense: Miles Variation | |
| Dec 27, 2025 | Kozak | ½–½ | Caruana | WRBC 2025 Rapid Open | Nimzo-Larsen Attack: Classical Variation | |
| Dec 26, 2025 | Meng | ½–½ | Kozak | WRBC 2025 Rapid Open | Italian Game: Giuoco Pianissimo, Normal | |
| Dec 26, 2025 | Kozak | ½–½ | Robson | WRBC 2025 Rapid Open | Nimzo-Larsen Attack: Classical Variation | |
| Dec 26, 2025 | Sklokin | 0–1 | Kozak | WRBC 2025 Rapid Open | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Dec 26, 2025 | Kozak | 1–0 | Ohanyan | WRBC 2025 Rapid Open | Nimzo-Larsen Attack: Classical Variation | |
| Dec 26, 2025 | Zverev | ½–½ | Kozak | WRBC 2025 Rapid Open | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Dec 18, 2025 | Kozak | 0–1 | Dominguez Perez | World Blitz 2025 Open | Zukertort Opening: Nimzo-Larsen Variation | |
| Dec 14, 2025 | Brkic | 1–0 | Kozak | Round 5: Brkic, Ante - Kozak, Adam | Ruy Lopez: Berlin Defense, Rio Gambit Accepted | |
| Dec 13, 2025 | Kozak | ½–½ | Wagner | Round 4: Kozak, Adam - Wagner, Dennis | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Dec 12, 2025 | Dragnev | ½–½ | Kozak | Round 3: Dragnev, Valentin - Kozak, Adam | Ruy Lopez: Berlin Defense, Rio Gambit Accepted | |
| Dec 11, 2025 | Kozak | ½–½ | Postny | Round 2: Kozak, Adam - Postny, Evgeny | Italian Game: Two Knights Defense | |
| Dec 10, 2025 | Idani | ½–½ | Kozak | Round 1: Idani, Pouya - Kozak, Adam | Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense | |
| Nov 30, 2025 | Kozak | 1–0 | Dankhazi | SuperLeagueRound3_MSSZ | Italian Game: Two Knights Defense | |