| Apr 6, 2026 | Koykka | 1–0 | Aalto | Round 3: Koykka, Pekka - Aalto, Patrik | Sicilian Defense: Najdorf Variation | |
| Apr 2, 2026 | Norri | 0–1 | Koykka | Round 9: Norri, Joose - Koykka, Pekka | Queen's Gambit Accepted: Old Variation | |
| Apr 2, 2026 | Koykka | ½–½ | Wartiovaara | Round 8: Koykka, Pekka - Wartiovaara, Oliver | Ruy Lopez: Closed, Delayed Exchange | |
| Apr 2, 2026 | Ronka | ½–½ | Koykka | Round 6: Ronka, Erik - Koykka, Pekka | English Opening: King's English, Mazedonisch | |
| Apr 2, 2026 | Koykka | 0–1 | Keinanen | Round 5: Koykka, Pekka - Keinanen, Toivo | French Defense: Rubinstein Variation, Blackburne Defense | |
| Apr 2, 2026 | Agopov | ½–½ | Koykka | Round 4: Agopov, Mikael - Koykka, Pekka | Caro-Kann Defense: Advance Variation, Short Variation | |
| Apr 2, 2026 | Lahdelma | 1–0 | Koykka | Round 2: Lahdelma, Henri - Koykka, Pekka | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | |
| Apr 2, 2026 | Koykka | 1–0 | Maki-Uuro | Round 1: Koykka, Pekka - Maki-Uuro, Miikka | French Defense: Rubinstein Variation, Blackburne Defense | |
| Mar 26, 2026 | Koykka | 0–1 | Luukkonen | Round 7: Koykka, Pekka - Luukkonen, Tommi | Sicilian Defense: Najdorf Variation | |
| Oct 21, 2025 | Koykka | 0–1 | Feuerstack | Round 3: Koykka, Pekka - Feuerstack, Aljoscha | Sicilian Defense: Taimanov Variation | |
| Oct 19, 2025 | Koykka | 0–1 | Gledura | Round 1: Koykka, Pekka - Gledura, Benjamin | King's Indian Defense: Makogonov Variation | |
| Jul 20, 2025 | Koykka | 1–0 | Borsos | Round 9: Koykka, Pekka - Borsos, Bogdan | English Opening: Symmetrical Variation | |
| Jul 18, 2025 | Mustonen | 0–1 | Koykka | Round 8: Mustonen, Niko - Koykka, Pekka | Slav Defense: Exchange Variation | |
| Jul 18, 2025 | Kuznecova | 1–0 | Koykka | Round 7: Kuznecova, Marija - Koykka, Pekka | Philidor Defense: Lion Variation | |
| Jul 17, 2025 | Koykka | ½–½ | Komulainen | Round 6: Koykka, Pekka - Komulainen, Lauri | Caro-Kann Defense: Classical Variation | |
| Jul 17, 2025 | Koykka | 1–0 | Seppala | Round 5: Koykka, Pekka - Seppala, Joni | English Opening: Agincourt Defense | |
| Jul 15, 2025 | Heino | 1–0 | Koykka | Round 4: Heino, Pessi - Koykka, Pekka | Nimzowitsch Defense: Williams Variation | |
| Jul 15, 2025 | Koykka | ½–½ | Jeyanth R | Round 3: Koykka, Pekka - Jeyanth R | Queen's Pawn Game: Symmetrical Variation | |
| Jul 14, 2025 | Mashhadi Aghajan | 0–1 | Koykka | Round 2: Mashhadi Aghajan, Rayan - Koykka, Pekka | Sicilian Defense: Smith-Morra Gambit | |
| Jul 14, 2025 | Koykka | 1–0 | Hintikka | Round 1: Koykka, Pekka - Hintikka, Eero | Trompowsky Attack: Borg Variation | |
| Apr 26, 2025 | Koykka | 0–1 | Wartiovaara | Uusinta, peli 2: Koykka, Pekka - Wartiovaara, Oliver | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Apr 26, 2025 | Ronka | ½–½ | Koykka | Round 9: Ronka, Erik - Koykka, Pekka | Pirc Defense | |
| Apr 26, 2025 | Wartiovaara | 1–0 | Koykka | Uusinta, peli 1: Wartiovaara, Oliver - Koykka, Pekka | Benoni Defense: Classical Variation, New York Variation | |
| Apr 25, 2025 | Koykka | 1–0 | Lahdelma | Round 8: Koykka, Pekka - Lahdelma, Henri | French Defense: Steinitz Variation, Boleslavsky Variation | |
| Apr 24, 2025 | Wartiovaara | 1–0 | Koykka | Round 7: Wartiovaara, Oliver - Koykka, Pekka | Queen's Gambit Declined | |
| Apr 23, 2025 | Koykka | ½–½ | Nyysti | Round 6: Koykka, Pekka - Nyysti, Sampsa | King's Indian Attack: Keres Variation | |
| Apr 22, 2025 | Luukkonen | 0–1 | Koykka | Round 5: Luukkonen, Tommi - Koykka, Pekka | Pirc Defense | |
| Apr 21, 2025 | Koykka | ½–½ | Keinanen | Round 4: Koykka, Pekka - Keinanen, Toivo | English Opening: Agincourt Defense | |
| Apr 20, 2025 | Agopov | 0–1 | Koykka | Round 3: Agopov, Mikael - Koykka, Pekka | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Apr 19, 2025 | Koykka | 0–1 | Sipila | Round 2: Koykka, Pekka - Sipila, Vilka | Four Knights Game | |
| Apr 18, 2025 | Koykka | 1–0 | Pitkanen | Round 1: Koykka, Pekka - Pitkanen, Artturi | Pseudo Queen's Indian Defense | |
| Jun 18, 2024 | Koykka | 1–0 | Luukkonen | Round 9: Koykka, Pekka - Luukkonen, Tommi | Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line | |
| Jun 17, 2024 | Flom | 1–0 | Koykka | Round 8: Flom, Gabriel - Koykka, Pekka | Dutch Defense: Hopton Attack | |
| Jun 16, 2024 | Krivenko | 0–1 | Koykka | Round 7: Krivenko, Dion - Koykka, Pekka | King's Indian Attack | |
| Jun 15, 2024 | Koykka | ½–½ | Mirzoev | Round 6: Koykka, Pekka - Mirzoev, Azer | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jun 14, 2024 | Koykka | 1–0 | Kokkila | Round 5: Koykka, Pekka - Kokkila, Tero | English Opening: Four Knights System, Nimzowitsch Variation | |
| Jun 13, 2024 | Maki-Uuro | ½–½ | Koykka | Round 4: Maki-Uuro, Miikka - Koykka, Pekka | Nimzo-Larsen Attack: Modern Variation | |
| Jun 12, 2024 | Koykka | 0–1 | Bilguun | Round 3: Koykka, Pekka - Bilguun, Sumiya | Queen's Gambit Declined: Tartakower Defense | |
| Jun 11, 2024 | Keinanen | ½–½ | Koykka | Round 2: Keinanen, Toivo - Koykka, Pekka | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Apr 3, 2024 | Agopov | ½–½ | Koykka | Round 6: Agopov, Mikael - Koykka, Pekka | Sicilian Defense: Dragon Variation | |
| Mar 29, 2024 | Keinanen | ½–½ | Koykka | Round 2: Keinanen, Toivo - Koykka, Pekka | Indian Defense: Anti-Nimzo-Indian | |
| Mar 28, 2024 | Koykka | 0–1 | Wartiovaara | Round 9: Koykka, Pekka - Wartiovaara, Oliver | Rapport-Jobava System | |
| Mar 28, 2024 | Sipila | 1–0 | Koykka | Round 8: Sipila, Vilka - Koykka, Pekka | French Defense: Advance Variation, Milner-Barry Gambit, Main Line | |
| Mar 28, 2024 | Koykka | 1–0 | Lahdelma | Round 7: Koykka, Pekka - Lahdelma, Henri | English Opening: Four Knights System, Nimzowitsch Variation | |
| Mar 28, 2024 | Koykka | 1–0 | Maki-Uuro | Round 5: Koykka, Pekka - Maki-Uuro, Miikka | Scandinavian Defense: Classical Variation | |
| Mar 28, 2024 | Kallunki | 0–1 | Koykka | Round 4: Kallunki, Konsta - Koykka, Pekka | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Mar 28, 2024 | Koykka | 0–1 | Valkama | Round 3: Koykka, Pekka - Valkama, Eero | Ruy Lopez: Closed, Zaitsev System | |
| Mar 28, 2024 | Luukkonen | 1–0 | Koykka | Round 1: Luukkonen, Tommi - Koykka, Pekka | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Sep 22, 2024 | Schwarz | 1–0 | Koykka | exe:Slovakia Open 24 | Benoni Defense: Knight's Tour Variation | |
| Sep 21, 2024 | Koykka | 0–1 | Ftacnik | exe:Slovakia Open 24 | Sicilian Defense: Najdorf Variation, English Attack | |
| Sep 20, 2024 | Tancsa | 0–1 | Koykka | exe:Slovakia Open 24 | Alekhine Defense: Scandinavian Variation | |
| Sep 19, 2024 | Koykka | ½–½ | Vandan Alankar Sawai | exe:Slovakia Open 24 | Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | |
| Sep 18, 2024 | Shturman | ½–½ | Koykka | exe:Slovakia Open 24 | French Defense: Winawer Variation, Portisch-Hook Variation | |
| Sep 17, 2024 | Koykka | 1–0 | Butenandt | exe:Slovakia Open 24 | Benoni Defense: Classical Variation, New York Variation | |
| Sep 16, 2024 | Filindash | ½–½ | Koykka | exe:Slovakia Open 24 | Slav Defense: Exchange Variation | |
| Sep 15, 2024 | Koykka | 1–0 | Bartos | exe:Slovakia Open 24 | Nimzo-Larsen Attack | |
| Sep 14, 2024 | Seker | 0–1 | Koykka | exe:Slovakia Open 24 | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Dec 30, 2023 | Koykka | 0–1 | Bailet | 51st Rilton Cup | Nimzo-Indian Defense: Kmoch Variation | |
| Dec 29, 2023 | Sokolovsky | 1–0 | Koykka | 51st Rilton Cup | Ruy Lopez: Schliemann Defense | |
| Dec 28, 2023 | Koykka | 1–0 | Subelj | 51st Rilton Cup | Sicilian Defense: Scheveningen Variation, Keres Attack | |
| Dec 30, 2022 | Koykka | 0–1 | Abdrlauf | 50th Rilton Cup | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Dec 28, 2022 | Koykka | 0–1 | Sardana | 50th Rilton Cup | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Nov 20, 2021 | Dragnev | 1–0 | Koykka | 23rd European Team Chess Championship 2021 - Open | Caro-Kann Defense: Two Knights Attack | |
| Nov 19, 2021 | Mikhalevski | 1–0 | Koykka | 23rd European Team Chess Championship 2021 - Open | Slav Defense: Czech Variation, Krause Attack | |
| Nov 18, 2021 | Koykka | 0–1 | Ivic | 23rd European Team Chess Championship 2021 - Open | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Nov 16, 2021 | Koykka | 1–0 | Valsecchi | 23rd European Team Chess Championship 2021 - Open | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Nov 14, 2021 | Borisek | 1–0 | Koykka | 23rd European Team Chess Championship 2021 - Open | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Nov 13, 2021 | Koykka | 0–1 | Hjartarson | 23rd European Team Chess Championship 2021 - Open | Nimzo-Indian Defense: Kmoch Variation | |
| Nov 12, 2021 | Koykka | 0–1 | Parligras | 23rd European Team Chess Championship 2021 - Open | Scotch Game: Schmidt Variation | |
| Aug 24, 2021 | Koykka | ½–½ | Gomez Jurado | Barcelona City | ? | |
| Aug 20, 2021 | Peralta | 1–0 | Koykka | Barcelona City | Dutch Defense: Semi-Leningrad Variation | |
| Aug 19, 2021 | Koykka | * | Izagirre Alsua | Barcelona City | ? | |
| Aug 18, 2021 | Ros Alonso | * | Koykka | Barcelona City | ? | |
