| May 9, 2026 | Demchenko | 0–1 | Fecker | rated rapid game | Zukertort Opening: Sicilian Invitation | |
| May 9, 2026 | Leung | 1–0 | Demchenko | rated rapid game | King's Indian Attack: Symmetrical Defense | |
| May 9, 2026 | Demchenko | 1–0 | Magdy | rated rapid game | King's Indian Attack: Double Fianchetto | |
| May 9, 2026 | Demchenko | 0–1 | Cappelletto | rated rapid game | Zukertort Opening: Sicilian Invitation | |
| May 9, 2026 | Shruti Arvind Rathi | 0–1 | Demchenko | rated rapid game | King's Indian Defense: Smyslov Variation | |
| May 9, 2026 | Demchenko | 1–0 | Pacan-Milej | rated rapid game | King's Indian Attack: Symmetrical Defense | |
| May 8, 2026 | Laptii | 1–0 | Demchenko | rated rapid game | Sicilian Defense: O'Kelly Variation, Réti System | |
| Apr 7, 2026 | Demchenko | 1–0 | Li | Round 9: Demchenko, Svitlana - Li, Yunshan | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Apr 6, 2026 | Demchenko | 0–1 | Ouellet | Round 7: Demchenko, Svitlana - Ouellet, Maili-Jade | Bishop's Opening: Vienna Hybrid, Spielmann Attack | |
| Apr 4, 2026 | Demchenko | 1–0 | Zhao | Round 5: Demchenko, Svitlana - Zhao, Erin | Queen's Pawn Game: Symmetrical Variation | |
| Jan 18, 2026 | Huang | 1–0 | Demchenko | CUCC 2026 | Catalan Opening: Closed | |
| Jan 8, 2026 | Demchenko | ½–½ | Vettese | CUCC 2026 | Pirc Defense: Classical Variation | |
| Apr 22, 2025 | Li | 1–0 | Demchenko | Round 9: Li, Yunshan - Demchenko, Svitlana | Slav Defense: Exchange Variation | |
| Apr 21, 2025 | Demchenko | 1–0 | Mills | Round 8: Demchenko, Svitlana - Mills, Morgen | Queen's Pawn Game: Symmetrical Variation | |
| Apr 21, 2025 | Qian | 0–1 | Demchenko | Round 7: Qian, Ashley - Demchenko, Svitlana | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Apr 20, 2025 | Jiang | 0–1 | Demchenko | Round 6: Jiang, Hanxi (Hancy) - Demchenko, Svitlana | Zukertort Opening: Dutch Variation | |
| Apr 19, 2025 | Demchenko | 1–0 | Poorna Prakash | Round 5: Demchenko, Svitlana - Poorna Prakash, Roshini | Indian Defense: London System | |
| Apr 19, 2025 | Xie | 0–1 | Demchenko | Canadian Closed 2025 | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Apr 18, 2025 | Demchenko | ½–½ | Ruchinskaya | Canadian Closed 2025 | Sicilian Defense: French Variation | |
| Apr 18, 2025 | de la Torre | 0–1 | Demchenko | Canadian Closed 2025 | Sicilian Defense: French Variation | |
| Apr 17, 2025 | Demchenko | 1–0 | Koop | Canadian Closed 2025 | Slav Defense: Quiet Variation, Pin Defense | |
| Jan 26, 2025 | Kang | ½–½ | Demchenko | Round 4: Kang, Dorian - Demchenko, Svitlana | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Jan 26, 2025 | Vettese | 1–0 | Demchenko | Round 5: Vettese, Nicholas - Demchenko, Svitlana | Scotch Game: Potter Variation | |
| Sep 22, 2024 | Demchenko | ½–½ | Baginskaite | 45th FIDE Women's Chess Olympiad | Queen's Pawn Game: Symmetrical Variation | |
| Sep 20, 2024 | Lazarne Vajda | 1–0 | Demchenko | 45th FIDE Women's Chess Olympiad | Indian Defense: Przepiorka Variation | |
| Sep 19, 2024 | Shen | 0–1 | Demchenko | 45th FIDE Women's Chess Olympiad | Scandinavian Defense: Gubinsky-Melts Defense | |
| Sep 18, 2024 | Demchenko | 0–1 | Radeva | 45th FIDE Women's Chess Olympiad | Indian Defense: London System | |
| Sep 15, 2024 | Berezovska | ½–½ | Demchenko | 45th FIDE Women's Chess Olympiad | Sicilian Defense: Godiva Variation | |
| Sep 14, 2024 | Giulian | ½–½ | Demchenko | 45th FIDE Women's Chess Olympiad | Sicilian Defense: Alapin Variation | |
| Sep 12, 2024 | Demchenko | 0–1 | Jorquera Cabello | 45th FIDE Women's Chess Olympiad | King's Indian Defense: Makogonov Variation | |
| Sep 11, 2024 | Demchenko | 1–0 | Tsai | 45th FIDE Women's Chess Olympiad | Sicilian Defense: Hyperaccelerated Dragon | |
| Jul 25, 2024 | Demchenko | 0–1 | Smeets | Biel Chess Festival MTO | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Jul 24, 2024 | Mata | 0–1 | Demchenko | Biel Chess Festival MTO | English Opening: Anglo-Dutch Defense | |
| Jul 23, 2024 | Demchenko | 1–0 | Haugner | Biel Chess Festival MTO | Queen's Pawn Game: London System, with e6 | |
| Jul 22, 2024 | Padmini | 1–0 | Demchenko | Biel Chess Festival MTO | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Jul 20, 2024 | Demchenko | 1–0 | Perreard | Biel Chess Festival MTO | Petrov's Defense: Nimzowitsch Attack | |
| Jul 19, 2024 | Smirnov | 1–0 | Demchenko | Biel Chess Festival MTO | Vienna Game: Mieses Variation, Erben Gambit | |
| Jul 18, 2024 | Demchenko | 1–0 | Monteverde | Biel Chess Festival MTO | Sicilian Defense: Moscow Variation | |
| Jul 16, 2024 | Demchenko | 0–1 | Chen | Biel Chess Festival MTO | Sicilian Defense: Alapin Variation, Barmen Defense | |
| Jul 15, 2024 | Kobo | 1–0 | Demchenko | Biel Chess Festival MTO | Queen's Gambit Declined: Queen's Knight Variation | |
| Apr 2, 2024 | Sreekumar | 0–1 | Demchenko | 2024 Zonals | Dutch Defense: Raphael Variation | |
| Apr 1, 2024 | Demchenko | 1–0 | Jiang | 2024 Zonals | Queen's Pawn Game: Symmetrical Variation | |
| Apr 1, 2024 | Li | 1–0 | Demchenko | 2024 Zonals | Dutch Defense: Leningrad Variation, Warsaw Variation | |
| Apr 1, 2024 | Deepak | 0–1 | Demchenko | 2024 Zonals | Zukertort Opening: Dutch Variation | |
| Mar 30, 2024 | Demchenko | 1–0 | Pham | Round 5: Demchenko, Svitlana - Pham, Bich Ngoc | Indian Defense: London System | |
| Mar 30, 2024 | Mills Morgen | 0–1 | Demchenko | Round 4: Mills Morgen - Demchenko, Svitlana | Scandinavian Defense: Gubinsky-Melts Defense | |
| Mar 29, 2024 | Demchenko | ½–½ | Ouellet | 2024 Canadian Championship at Hart House, Toronto | Sicilian Defense: Alapin Variation, Smith-Morra Declined | |
| Mar 29, 2024 | Demchenko | 1–0 | Fiset | 2024 Canadian Championship at Hart House, Toronto | Queen's Pawn Game: Symmetrical Variation | |
| Mar 28, 2024 | Gavrileva | 0–1 | Demchenko | Round 1: Gavrileva, Anna - Demchenko, Svitlana | Benoni Defense: Old Benoni | |
| Jul 17, 2024 | Douguet | 0–1 | Demchenko | Biel Chess Festival - MTO | Scandinavian Defense: Portuguese Gambit, Wuss Variation | |
| Jul 24, 2022 | Markidis | 1–0 | Demchenko | 15th Paleochora Open | ? | |
| Jul 23, 2022 | Demchenko | * | Spyratos | 15th Paleochora Open | ? | |
| Jul 22, 2022 | Mitsis | * | Demchenko | 15th Paleochora Open | ? | |
| Jul 21, 2022 | Demchenko | 0–1 | Pap | 15th Paleochora Open | Indian Defense: London System | |
| Jul 20, 2022 | Giannoulakis | ½–½ | Demchenko | 15th Paleochora Open | Tarrasch Defense: Two Knights Variation | |
| Jul 19, 2022 | Demchenko | ½–½ | Barbot | 15th Paleochora Open | Nimzo-Indian Defense: Normal Variation | |
| Jul 18, 2022 | Demchenko | 1–0 | Barp | 15th Paleochora Open | Queen's Pawn Game: London System | |
| Jul 17, 2022 | Katsanis | 0–1 | Demchenko | 15th Paleochora Open | ? | |
| Sep 10, 2021 | Demchenko | 1–0 | Obregon Garcia | Online_Olympiad_Div1_PoolD | Sicilian Defense: Old Sicilian | |
| Sep 10, 2021 | Caballero Quijano | 1–0 | Demchenko | Online_Olympiad_Div1_PoolD | Indian Defense: Knights Variation | |
| Sep 10, 2021 | Malicka | 0–1 | Demchenko | Online_Olympiad_Div1_PoolD | Sicilian Defense: Paulsen-Basman Defense | |
| Sep 9, 2021 | Demchenko | 0–1 | Roebers | Online_Olympiad_Div1_PoolD | Sicilian Defense: Lasker-Pelikan Variation | |
| Sep 9, 2021 | Demchenko | 1–0 | Duran | Online_Olympiad_Div1_PoolD | French Defense: Tarrasch Variation, Closed Variation | |
| Sep 9, 2021 | shaya01 | 1–0 | Demchenko | Online_Olympiad_Div1_PoolD | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Sep 8, 2021 | Demchenko | 0–1 | Cervantes Landeiro | Online_Olympiad_Div1_PoolD | Sicilian Defense: Najdorf Variation, Zagreb Variation | |
| Sep 8, 2021 | Demchenko | 1–0 | Manuela004 | Online_Olympiad_Div1_PoolD | Queen's Pawn Game: Barry Attack | |
| Sep 8, 2021 | De Freitas | 1–0 | Demchenko | Online_Olympiad_Div1_PoolD | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Aug 1, 2021 | Demchenko | 1–0 | Chua | World Youth Cup 2021 O10-G18 - Girls 18 | Sicilian Defense: Najdorf Variation, Zagreb Variation | |
| Aug 1, 2021 | Demchenko | 1–0 | Allahverdiyeva | World Youth Cup 2021 O10-G18 - Girls 18 | King's Indian Defense: Normal Variation, Standard Development | |
| Aug 1, 2021 | Demchenko | 1–0 | Singgih | World Youth Cup 2021 O10-G18 - Girls 18 | Queen's Pawn Game: London System | |
| Aug 1, 2021 | Demchenko | ½–½ | Zeliantsova | World Youth Cup 2021 O10-G18 - Girls 18 | Pirc Defense | |
| Aug 1, 2021 | Demchenko | 1–0 | Kotwal | World Youth Cup 2021 O10-G18 - Girls 18 | French Defense: Tarrasch Variation, Closed Variation | |
| Aug 1, 2021 | Pham | 0–1 | Demchenko | World Youth Cup 2021 O10-G18 - Girls 18 | Nimzo-Larsen Attack: Classical Variation | |
| Aug 1, 2021 | Raghunath | ½–½ | Demchenko | World Youth Cup 2021 O10-G18 - Girls 18 | London System: Poisoned Pawn Variation | |
| Aug 1, 2021 | Esadze | ½–½ | Demchenko | World Youth Cup 2021 O10-G18 - Girls 18 | Alekhine Defense: Exchange Variation | |
| Aug 1, 2021 | Bach | 1–0 | Demchenko | World Youth Cup 2021 O10-G18 - Girls 18 | King's Indian Defense: Orthodox Variation, Bayonet Attack | |
| Aug 1, 2021 | Mukherjee | 1–0 | Demchenko | World Youth Cup 2021 O10-G18 - Girls 18 | Trompowsky Attack | |
| Jul 14, 2021 | Demchenko | ½–½ | Cyfka | FIDE Women's World Cup | Sicilian Defense: Delayed Alapin Variation, with e6 | |
| Jul 14, 2021 | Demchenko | ½–½ | Cyfka | FIDE Women's World Cup | Four Knights Game: Scotch Variation Accepted | |
| Jul 14, 2021 | Cyfka | ½–½ | Demchenko | FIDE Women's World Cup | Bogo-Indian Defense: Grünfeld Variation | |
| Jul 14, 2021 | Cyfka | 1–0 | Demchenko | FIDE Women's World Cup | Indian Defense: Knights Variation | |
| Jul 13, 2021 | Demchenko | ½–½ | Cyfka | World Cup (women) | Petrov's Defense: Nimzowitsch Attack | |
| Jul 12, 2021 | Cyfka | ½–½ | Demchenko | World Cup (women) | Bogo-Indian Defense: Grünfeld Variation | |
| Jul 8, 2021 | Ojas Kulkarni | ½–½ | Demchenko | Serbia Chess Open | Masters | ? | |
| Jun 1, 2021 | Chiu | 1–0 | Demchenko | 8th Cherry Blossom Classic - Open | King's Indian Defense: Fianchetto Variation, Panno Variation | |
| May 31, 2021 | Demchenko | ½–½ | Yu | 8th Cherry Blossom Classic - Open | Queen's Pawn Game: London System | |
| May 30, 2021 | Belous | 1–0 | Demchenko | 8th Cherry Blossom Classic - Open | English Opening: Symmetrical Variation | |
| May 28, 2021 | Demchenko | 0–1 | Kraai | 8th Cherry Blossom Classic - Open | French Defense: Tarrasch Variation, Chistyakov Defense | |
| May 28, 2021 | Panchanathan | ½–½ | Demchenko | 8th Cherry Blossom Classic - Open | King's Indian Attack: Symmetrical Defense | |
| Dec 19, 2020 | Demchenko | ½–½ | Priyanka | FIDE World Youth Rapid Champ - Finals - U18 - Girls | French Defense: Tarrasch Variation, Closed Variation | |
| Dec 19, 2020 | Priyanka | 1–0 | Demchenko | FIDE World Youth Rapid Champ - Finals - U18 - Girls | Zukertort Opening: Quiet System | |