| Jun 11, 2026 | Talibov | 0–1 | Koziak | Round 9: Talibov, Shiroghlan - Koziak, Vitali | ? | |
| Jun 10, 2026 | Koziak | 1–0 | Shuvalova | Round 8: Koziak, Vitali - Shuvalova, Polina | Nimzo-Indian Defense | |
| Jun 9, 2026 | Xu | 0–1 | Koziak | Round 7: Xu, Ziyuan - Koziak, Vitali | Ruy Lopez: Berlin Defense, Anti-Berlin Variation | |
| Jun 8, 2026 | Koziak | ½–½ | Nazari | Round 6: Koziak, Vitali - Nazari, Arad | Grünfeld Defense: Exchange Variation, Modern Exchange Variation | |
| Jun 7, 2026 | Mamedov | 1–0 | Koziak | Round 5: Mamedov, Edgar - Koziak, Vitali | English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation | |
| Jun 6, 2026 | Koziak | 0–1 | Ansat | Round 4: Koziak, Vitali - Ansat, Aldiyar | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Jun 5, 2026 | Urazayev | ½–½ | Koziak | Round 3: Urazayev, Arystanbek - Koziak, Vitali | Bishop's Opening: Paulsen Defense | |
| Jun 4, 2026 | Koziak | ½–½ | Gholami Orimi | Round 2: Koziak, Vitali - Gholami Orimi, Mahdi | Nimzo-Indian Defense: Normal Variation | |
| Jun 3, 2026 | Nogerbek | 0–1 | Koziak | Round 1: Nogerbek, Kazybek - Koziak, Vitali | King's Indian Attack | |
| Mar 25, 2026 | Koziak | 0–1 | Begmuratov | Round 9: Koziak, Vitali - Begmuratov, Khumoyun | King's Indian Defense: Semi-Averbakh System | |
| Mar 18, 2026 | Kong | 1–0 | Koziak | Round 2: Kong, Xiangrui - Koziak, Vitali | Sicilian Defense: Dragon Variation, Yugoslav Attack | |
| Nov 16, 2025 | Rostovtsev | 1–0 | Koziak | Round 9: Rostovtsev, Dmitry - Koziak, Vitali | Queen's Gambit Declined | |
| Nov 15, 2025 | Koziak | 1–0 | Abdilkhair | Round 8: Koziak, Vitali - Abdilkhair, Abilmansur | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| Nov 14, 2025 | Ayush Sharma | ½–½ | Koziak | Round 7: Ayush Sharma - Koziak, Vitali | Ruy Lopez: Berlin Defense, Rio Gambit Accepted | |
| Nov 14, 2025 | Koziak | ½–½ | Yeganegi | Round 6: Koziak, Vitali - Yeganegi, Barad | Queen's Gambit Declined: Exchange Variation, Sämisch Variation | |
| Nov 13, 2025 | Yang | ½–½ | Koziak | Round 5: Yang, Zilong - Koziak, Vitali | Caro-Kann Defense: Tartakower Variation | |
| Nov 12, 2025 | Koziak | 0–1 | Volodin | Round 3: Koziak, Vitali - Volodin, Alexandr E. | English Opening: Mikenas-Carls Variation | |
| Nov 10, 2025 | Koziak | 0–1 | Sankalp Gupta | Round 1: Koziak, Vitali - Sankalp Gupta | Nimzo-Indian Defense: Normal Variation, Classical Defense | |
| Mar 17, 2025 | Dzhumakanov | 0–1 | Koziak | Round 9: Dzhumakanov, Kuanysh - Koziak, Vitali | French Defense: Tarrasch Variation, Chistyakov Defense | |
| Mar 17, 2025 | Koziak | 0–1 | Baitleu | Round 8: Koziak, Vitali - Baitleu, Syrym | Benko Gambit Accepted: Fianchetto Variation | |
| Mar 17, 2025 | Assylov | ½–½ | Koziak | Round 7: Assylov, Miras - Koziak, Vitali | Nimzo-Larsen Attack: Classical Variation | |
| Mar 17, 2025 | Askarov | 0–1 | Koziak | Round 6: Askarov, Bakhtiyar - Koziak, Vitali | Nimzo-Larsen Attack: Classical Variation | |
| Mar 17, 2025 | Koziak | 0–1 | Shonazarov | Round 5: Koziak, Vitali - Shonazarov, Orash | Old Indian Defense: Normal Variation | |
| Mar 17, 2025 | Koziak | 1–0 | Akhmetov | Round 4: Koziak, Vitali - Akhmetov, Ayan | Queen's Gambit Declined: Three Knights, Vienna Variation | |
| Mar 17, 2025 | Gasparyan | ½–½ | Koziak | Round 3: Gasparyan, Erik R. - Koziak, Vitali | Zukertort Opening: Nimzo-Larsen Variation | |
| Nov 12, 2024 | Koziak | 0–1 | Gareyev | Round of 16 | Game 1: Koziak, Vitali - Gareyev, Timur | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Nov 12, 2024 | Gareyev | 1–0 | Koziak | Round of 16 | Game 2: Gareyev, Timur - Koziak, Vitali | Sicilian Defense: Najdorf Variation, English Attack | |
| Oct 10, 2024 | Ansat | ½–½ | Koziak | Round 10: Ansat, Aldiyar - Koziak, Vitali | Ruy Lopez: Berlin Defense | |
| Oct 9, 2024 | Koziak | 1–0 | Nogerbek | Round 9: Koziak, Vitali - Nogerbek, Kazybek | Scandinavian Defense: Bronstein Variation | |
| Oct 8, 2024 | Gareyev | ½–½ | Koziak | Round 8: Gareyev, Timur - Koziak, Vitali | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Oct 7, 2024 | Shyam | 0–1 | Koziak | Round 7: Shyam, Sundar M. - Koziak, Vitali | Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation | |
| Oct 6, 2024 | Koziak | 0–1 | Bai | Round 6: Koziak, Vitali - Bai, Jinshi | Sicilian Defense: Delayed Alapin Variation | |
| Oct 6, 2024 | Koziak | 1–0 | Iljiushenok | Round 5: Koziak, Vitali - Iljiushenok, Ilia | Queen's Gambit Declined: Three Knights, Vienna Variation | |
| Oct 5, 2024 | Pantsulaia | ½–½ | Koziak | Round 4: Pantsulaia, Levan - Koziak, Vitali | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Oct 4, 2024 | Koziak | 1–0 | Madaminov | Round 3: Koziak, Vitali - Madaminov, Mukhiddin | Four Knights Game: Scotch Variation, Krause Gambit, Leonhardt Defense | |
| Oct 3, 2024 | Zhalmakhanov | ½–½ | Koziak | Round 2: Zhalmakhanov, Ramazan - Koziak, Vitali | Ruy Lopez: Closed | |
| May 25, 2024 | Aditya Mittal | 1–0 | Koziak | Round 1: Aditya Mittal - Koziak, Vitali | Italian Game: Classical Variation, Giuoco Pianissimo, with h6 | |