| Apr 29, 2026 | Kharita | 0–1 | Tkacenko | Round 8: Kharita, Mohammad - Tkacenko, Kostia | French Defense: Classical Variation, Richter Attack | |
| Apr 29, 2026 | Tkacenko | 0–1 | De Wit | Round 7: Tkacenko, Kostia - De Wit, Jim | Sicilian Defense: O'Kelly Variation, Normal System | |
| Apr 29, 2026 | Ngangbam | 1–0 | Tkacenko | Round 6: Ngangbam, Chingthang - Tkacenko, Kostia | French Defense: Classical Variation, Richter Attack | |
| Apr 27, 2026 | Tkacenko | 1–0 | Brorens | Round 5: Tkacenko, Kostia - Brorens, Victor | Ruy Lopez: Classical Variation, Zukertort Gambit | |
| Apr 27, 2026 | Lalkota | 1–0 | Tkacenko | Round 4: Lalkota, Sai Pranav Tejas - Tkacenko, Kostia | English Opening: King's English Variation, Two Knights Variation, Reversed Dragon | |
| Apr 27, 2026 | Tkacenko | 0–1 | Huang | Round 3: Tkacenko, Kostia - Huang, Vincent | Sicilian Defense: Dragon Variation, Classical Variation, Grigoriev Variation | |
| Apr 25, 2026 | Sosef | 1–0 | Tkacenko | Round 2: Sosef, Noah - Tkacenko, Kostia | French Defense: Winawer Variation, Bogoljubow Variation | |
| Apr 25, 2026 | Tkacenko | 1–0 | Nadrshin | Round 1: Tkacenko, Kostia - Nadrshin, Oleg | Sicilian Defense: Lasker-Pelikan Variation | |
| May 2, 2025 | Tkacenko | 0–1 | Ozbek | Round 9: Tkacenko, Kostia - Ozbek, Ahmet Naim | Nimzo-Indian Defense: Sämisch Variation | |
| May 1, 2025 | Kleinjan | ½–½ | Tkacenko | Round 8: Kleinjan, Thias - Tkacenko, Kostia | Caro-Kann Defense: Main Line | |
| Apr 30, 2025 | Tkacenko | 0–1 | Kudernac | Round 7: Tkacenko, Kostia - Kudernac, Theo | Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense | |
| Apr 29, 2025 | Bajnath | 1–0 | Tkacenko | Round 5: Bajnath, Danesh - Tkacenko, Kostia | Caro-Kann Defense: Advance Variation, Short Variation | |
| Apr 28, 2025 | Tkacenko | 0–1 | Luong | Round 4: Tkacenko, Kostia - Luong, Thao | King's Indian Defense | |
| Apr 28, 2025 | Etienne | 1–0 | Tkacenko | Round 3: Etienne, Ghilon - Tkacenko, Kostia | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Retreat Line | |
| Apr 27, 2025 | Tkacenko | ½–½ | Yantur | Round 2: Tkacenko, Kostia - Yantur, Arda | King's Indian Defense: Semi-Classical Variation | |
| Apr 26, 2025 | Lenting | 1–0 | Tkacenko | Round 1: Lenting, Roan - Tkacenko, Kostia | Caro-Kann Defense: Main Line | |
