| — | Nissinen | 1–0 | Cizmar | exe:Slovakia Open | French Defense: Advance Variation, Milner-Barry Gambit, Hector Variation | |
| Jun 20, 2026 | Nissinen | 1–0 | Lam | Round 10: Nissinen, Niilo Man - Lam, Chun Yung Samuel | Queen's Gambit Declined: Modern Variation | |
| Jun 20, 2026 | Van Foreest | 1–0 | Nissinen | Round 9: Van Foreest, Jorden - Nissinen, Niilo Man | Nimzo-Larsen Attack: Modern Variation | |
| Jun 20, 2026 | Nissinen | 1–0 | Jumabayev | Round 8: Nissinen, Niilo Man - Jumabayev, Rinat | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Jun 20, 2026 | Duda | 1–0 | Nissinen | Round 7: Duda, Jan-Krzysztof - Nissinen, Niilo Man | Trompowsky Attack | |
| Jun 20, 2026 | Gonzalvez Tamarit | 0–1 | Nissinen | Round 6: Gonzalvez Tamarit, Ruben - Nissinen, Niilo Man | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| Jun 20, 2026 | Rodriguez Redondo | 1–0 | Nissinen | Round 5: Rodriguez Redondo, Adhara - Nissinen, Niilo Man | Caro-Kann Defense: Exchange Variation | |
| Jun 20, 2026 | Nissinen | 0–1 | Li | Round 4: Nissinen, Niilo Man - Li, Di | French Defense: St. George Defense | |
| Jun 20, 2026 | Peng | 1–0 | Nissinen | Round 3: Peng, Xiongjian - Nissinen, Niilo Man | Zukertort Opening | |
| Jun 20, 2026 | Nissinen | 1–0 | Yu | Round 2: Nissinen, Niilo Man - Yu, Tianxiang Carlos | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jun 19, 2026 | Zhou | 0–1 | Nissinen | Round 12: Zhou, Yuxu - Nissinen, Niilo Man | Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation | |
| Jun 19, 2026 | Zhang | 0–1 | Nissinen | Round 11: Zhang, Xiaopeng - Nissinen, Niilo Man | Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation | |
| Jun 19, 2026 | Mas | 1–0 | Nissinen | Round 9: Mas, Hafizulhelmi - Nissinen, Niilo Man | Sicilian Defense: McDonnell Attack | |
| Jun 18, 2026 | Nissinen | 0–1 | Al-Mudahka | Round 8: Nissinen, Niilo Man - Al-Mudahka, Mohd | Indian Defense: Budapest Defense, Adler Variation | |
| Jun 18, 2026 | Ding | 0–1 | Nissinen | Round 7: Ding, Jun - Nissinen, Niilo Man | Sicilian Defense: Old Sicilian | |
| Jun 18, 2026 | Agarwal | 0–1 | Nissinen | Round 6: Agarwal, Amartya Shiv - Nissinen, Niilo Man | Ruy Lopez: Exchange Variation, Normal Variation | |
| Jun 18, 2026 | Nissinen | 1–0 | Genkeswaran | Round 5: Nissinen, Niilo Man - Genkeswaran, Genivan | Queen's Gambit Declined | |
| Jun 17, 2026 | Garcia Ramos | 1–0 | Nissinen | Round 4: Garcia Ramos, Daniel - Nissinen, Niilo Man | King's Indian Attack: Spassky Variation | |
| Jun 17, 2026 | Nissinen | 0–1 | Chinguun | Round 3: Nissinen, Niilo Man - Chinguun, Sumiya | Sicilian Defense: Najdorf Variation, Opocensky Variation, Modern Line | |
| Jun 17, 2026 | Silva | 0–1 | Nissinen | Round 2: Silva, Winston Joseph R - Nissinen, Niilo Man | ? | |
| Jun 17, 2026 | Nissinen | ½–½ | Suleimen | FIDE WTRC 2026 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jun 6, 2026 | Nissinen | 1–0 | Agibileg | Round 9: Nissinen, Niilo Man - Agibileg, Uurtsaikh | French Defense: Advance Variation, Wade Variation | |
| Jun 5, 2026 | Atakhan | ½–½ | Nissinen | Round 8: Atakhan, Abtin - Nissinen, Niilo Man | Nimzo-Indian Defense: Normal Variation, Schlechter Defense | |
| Jun 4, 2026 | Nissinen | 1–0 | Itgelt | Round 7: Nissinen, Niilo Man - Itgelt, Khuyagtsogt | Caro-Kann Defense: Gurgenidze System | |
| Jun 3, 2026 | Bayarmandakh | 0–1 | Nissinen | Round 6: Bayarmandakh, Balgan - Nissinen, Niilo Man | Bogo-Indian Defense: Retreat Variation | |
| Jun 2, 2026 | Nissinen | 0–1 | Laohawirapap | Round 5: Nissinen, Niilo Man - Laohawirapap, Prin | Ruy Lopez: Closed, Martinez Variation | |
| Jun 1, 2026 | Amartuvshin | 1–0 | Nissinen | Round 4: Amartuvshin, Ganzorig - Nissinen, Niilo Man | Queen's Gambit Declined: Harrwitz Attack | |
| May 31, 2026 | Nissinen | 1–0 | Batchuluun | Round 3: Nissinen, Niilo Man - Batchuluun, Tsegmed | French Defense: Classical Variation, Shirov-Anand Variation | |
| May 30, 2026 | Erdene | 0–1 | Nissinen | Round 2: Erdene, Chinzorig - Nissinen, Niilo Man | Zukertort Opening: Nimzo-Larsen Variation | |
| May 29, 2026 | Nissinen | 0–1 | Ilamparthi A R | Round 1: Nissinen, Niilo Man - Ilamparthi A R | Italian Game: Scotch Invitation Declined | |
| May 23, 2026 | Nagy | 1–0 | Nissinen | VII Coop Saaremaa Chess Festival Rapid | English Opening: King's English Variation | |
| May 9, 2026 | Nissinen | 1–0 | Sterns | rated rapid game | Sicilian Defense: Kan Variation, Modern Variation | |
| May 9, 2026 | Kodikara | 0–1 | Nissinen | rated rapid game | Yusupov-Rubinstein System | |
| May 9, 2026 | Nissinen | ½–½ | Quirhuayo Chumbe | rated rapid game | Sicilian Defense: Scheveningen Variation, Keres Attack | |
| May 9, 2026 | Velarde | 0–1 | Nissinen | rated rapid game | Indian Defense: Gibbins-Weidenhagen Gambit Accepted | |
| May 9, 2026 | Nissinen | 1–0 | Menzi | rated rapid game | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| May 9, 2026 | Rainio | 0–1 | Nissinen | rated rapid game | Sicilian Defense: Alapin Variation | |
| May 9, 2026 | Nissinen | 1–0 | Bosa Keipidile | rated rapid game | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Mar 1, 2026 | Nissinen | 1–0 | Salonen | new tournament description | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Mar 1, 2026 | Wartiovaara | 0–1 | Nissinen | new tournament description | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Feb 28, 2026 | Nyysti | ½–½ | Nissinen | new tournament description | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Feb 28, 2026 | Nissinen | 1–0 | Vesa | new tournament description | Italian Game: Giuoco Pianissimo, Normal | |
| Feb 27, 2026 | Hakulinen | 0–1 | Nissinen | new tournament description | English Opening: Agincourt Defense | |
| Feb 24, 2026 | Agopov | 1–0 | Nissinen | new tournament description | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Feb 24, 2026 | Nissinen | 1–0 | Sipila | new tournament description | Italian Game: Classical Variation, Giuoco Pianissimo, Albin Variation | |
| Feb 23, 2026 | Nissinen | 1–0 | Nguyen | Samarkand Olympiad Selection 2026 - finals | Sicilian Defense: Najdorf Variation, Opocensky Variation, Modern Line | |
| Feb 23, 2026 | Nguyen | 0–1 | Nissinen | Samarkand Olympiad Selection 2026 - finals | Sicilian Defense: Lasker-Pelikan Variation | |
| Feb 22, 2026 | Tong | 0–1 | Nissinen | Samarkand Olympiad Selection 2026 | Sicilian Defense: Closed, Traditional | |
| Feb 22, 2026 | Nissinen | 1–0 | Tong | Samarkand Olympiad Selection 2026 | Pirc Defense | |
| Feb 21, 2026 | Nissinen | 1–0 | Chan | Samarkand Olympiad Selection 2026 | French Defense: Winawer Variation, Retreat Variation | |
| Feb 21, 2026 | Nissinen | 1–0 | Nguyen | Samarkand Olympiad Selection 2026 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Feb 20, 2026 | Nissinen | 1–0 | Jin | Samarkand Olympiad Selection 2026 | Sicilian Defense: Scheveningen Variation, Classical Variation | |
| Feb 20, 2026 | Nissinen | 1–0 | Shah | Samarkand Olympiad Selection 2026 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Feb 20, 2026 | Zhang | 0–1 | Nissinen | Samarkand Olympiad Selection 2026 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Feb 20, 2026 | Li | 1–0 | Nissinen | Samarkand Olympiad Selection 2026 | Sicilian Defense: Lasker-Dunne Attack | |
| Dec 29, 2025 | Kyaw Myat Aung | 0–1 | Nissinen | HKIO 2025 | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation | |
| Dec 28, 2025 | Chong | 0–1 | Nissinen | HKIO 2025 | Indian Defense: London System | |
| Dec 27, 2025 | Nissinen | ½–½ | Zhou | HKIO 2025 | Zukertort Opening: Nimzo-Larsen Variation | |
| Dec 26, 2025 | Tran Vo Quoc Bao | 1–0 | Nissinen | HKIO 2025 | Sicilian Defense: Classical Variation | |
| Dec 26, 2025 | Nissinen | ½–½ | Wang | HKIO 2025 | Sicilian Defense: Four Knights Variation, Cobra Variation | |
| Dec 25, 2025 | Alriyami | 0–1 | Nissinen | HKIO 2025 | Sicilian Defense: Dragon Variation, Classical Variation | |
| Dec 24, 2025 | Nissinen | 0–1 | Sung | HKIO 2025 | Caro-Kann Defense: Exchange Variation | |
| Dec 24, 2025 | Kavin Mohan | 1–0 | Nissinen | HKIO 2025 | Indian Defense | |
| Dec 23, 2025 | Nissinen | 1–0 | Wei | HKIO 2025 | French Defense: Advance Variation, Milner-Barry Gambit, Hector Variation | |
| Jul 18, 2025 | Nissinen | 0–1 | Seppala | Round 7: Nissinen, Niilo Man - Seppala, Joni | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Jul 17, 2025 | Kulkarni Bhakti | 1–0 | Nissinen | Round 6: Kulkarni Bhakti - Nissinen, Niilo Man | English Opening: Agincourt Defense | |
| Jul 15, 2025 | Deuer | 1–0 | Nissinen | Round 4: Deuer, Marius - Nissinen, Niilo Man | English Opening: Mikenas-Carls Variation | |
| Jul 15, 2025 | Nissinen | 1–0 | Soppela | Round 3: Nissinen, Niilo Man - Soppela, Jouni | Pirc Defense | |
| Jul 14, 2025 | Collander | * | Nissinen | Round 1: Collander, David - Nissinen, Niilo Man | ? | |
| Jun 8, 2025 | Nissinen | * | Daksh Jain | Round 1: Nissinen, Niilo Man - Daksh Jain | ? | |
| Jun 8, 2025 | Kadam Arnav | 1–0 | Nissinen | Round 2: Kadam Arnav - Nissinen, Niilo Man | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Jun 1, 2025 | Pragnya H G | ½–½ | Nissinen | Norway Chess Open 2025 | Sicilian Defense: Four Knights Variation, Exchange Variation | |
| May 31, 2025 | Nissinen | 1–0 | Charvi A | Norway Chess Open 2025 | Sicilian Defense: Najdorf Variation, Adams Attack | |
| May 30, 2025 | Machin | 0–1 | Nissinen | Norway Chess Open 2025 | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| May 30, 2025 | Nissinen | 0–1 | Advaitt Srikant Koduri | Norway Chess Open 2025 | Caro-Kann Defense: Advance Variation | |
| May 29, 2025 | Johansson | 1–0 | Nissinen | Norway Chess Open 2025 | English Opening: King's English Variation, Adhiban Gambit | |
| May 29, 2025 | Nissinen | ½–½ | Fu | Norway Chess Open 2025 | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| May 28, 2025 | Aravindhan | 0–1 | Nissinen | Norway Chess Open 2025 | Sicilian Defense: Godiva Variation | |
| May 27, 2025 | Nissinen | 0–1 | Urkedal | Norway Chess Open 2025 | Ruy Lopez: Closed, Martinez Variation | |
| May 27, 2025 | Pintor | 0–1 | Nissinen | Norway Chess Open 2025 | ? | |
| Apr 21, 2025 | Nissinen | 0–1 | Sorensen | Freestyle Chess Open A | ? | |
| Apr 21, 2025 | Kilic | 1–0 | Nissinen | Freestyle Chess Open A | ? | |
| Apr 20, 2025 | Nissinen | 1–0 | Injac | Freestyle Chess Open A | ? | |
| Apr 19, 2025 | Nissinen | 0–1 | Livaic | Freestyle Chess Open A | ? | |
| Apr 19, 2025 | Dardha | 1–0 | Nissinen | Freestyle Chess Open A | ? | |
| Apr 18, 2025 | Nissinen | 1–0 | Basso | Round 3: Nissinen, Niilo Man - Basso, Pier Luigi | ? | |
| Apr 18, 2025 | Yoo | ½–½ | Nissinen | Round 2: Yoo, Christopher Woojin - Nissinen, Niilo Man | ? | |
| Apr 13, 2025 | Nissinen | 0–1 | Friedel | Reykjavik Open 2025 | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Apr 13, 2025 | Adhiban | 1–0 | Nissinen | Reykjavik Open 2025 | English Opening: Anglo-Indian Defense, Zvjaginsev-Krasenkow Attack | |
| Apr 12, 2025 | Nissinen | 1–0 | Niermann | Reykjavik Open 2025 | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Apr 11, 2025 | Valtysson | 0–1 | Nissinen | Reykjavik Open 2025 | Queen's Pawn Game: London System | |
| Apr 10, 2025 | Nissinen | ½–½ | Bailet | Reykjavik Open 2025 | Four Knights Game: Spanish Variation, Classical Variation | |
| Apr 10, 2025 | Papp | ½–½ | Nissinen | Reykjavik Open 2025 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Mar 7, 2025 | Adireddy Arjun | ½–½ | Nissinen | Round 11: Adireddy Arjun - Nissinen, Niilo Man | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation | |
| Mar 6, 2025 | Nissinen | 1–0 | Belkaid | Round 10: Nissinen, Niilo Man - Belkaid, Sohan | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Mar 5, 2025 | Nissinen | 0–1 | Dyachuk | Round 9: Nissinen, Niilo Man - Dyachuk, Artem | Caro-Kann Defense: Advance Variation, Short Variation | |
| Mar 4, 2025 | Omonov | 0–1 | Nissinen | Round 8: Omonov, Asrorjon - Nissinen, Niilo Man | Nimzo-Indian Defense: Reshevsky Variation | |
| Mar 3, 2025 | Nissinen | 0–1 | Goroshkov | Round 7: Nissinen, Niilo Man - Goroshkov, Maksym | French Defense: Advance Variation, Euwe Variation | |
| Mar 2, 2025 | Palczert | 1–0 | Nissinen | Round 6: Palczert, Matyas - Nissinen, Niilo Man | Sicilian Defense: Old Sicilian | |
| Mar 1, 2025 | Nissinen | 1–0 | Novosel | Round 5: Nissinen, Niilo Man - Novosel, Lovro | Sicilian Defense: Najdorf Variation, Adams Attack | |