| Jul 5, 2023 | Jason Liang | 0–1 | Hans Niemann | Round 9: Jason Liang - Hans Niemann | Sicilian Defense: Moscow Variation | |
| Jul 4, 2023 | Hans Niemann | * | Alice Lee | 51st Annual World Open | ? | |
| Jul 2, 2023 | Srivatshav Rahul | 1–0 | Hans Niemann | 51st Annual World Open | King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System | |
| Jul 2, 2023 | Hans Niemann | ½–½ | Nico Chasin | 51st Annual World Open | Indian Defense: Anti-Nimzo-Indian | |
| Jul 1, 2023 | Leiva Gianmarco | 0–1 | Hans Niemann | 51st Annual World Open | King's Indian Defense: Fianchetto Variation, Classical Variation | |
| Jun 30, 2023 | Siddharth Arun | 0–1 | Hans Niemann | 51st Annual World Open | Rapport-Jobava System | |
| Jun 28, 2023 | Zaven Andriasian | 1–0 | Hans Niemann | 16th Annual Philadelphia International | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Jun 27, 2023 | Hans Niemann | ½–½ | Tuan Minh Le | 16th Annual Philadelphia International | Ruy Lopez: Morphy Defense, Classical Defense Deferred | |
| Jun 27, 2023 | Fidel Corrales Jimenenz | ½–½ | Hans Niemann | 16th Annual Philadelphia International | Sicilian Defense: Moscow Variation | |
| Jun 26, 2023 | Hans Niemann | 1–0 | Djurabek Khamrakulov | 16th Annual Philadelphia International | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Jun 26, 2023 | Victor Mikhalevski | 0–1 | Hans Niemann | 16th Annual Philadelphia International | King's Indian Defense: Orthodox Variation | |
| Jun 25, 2023 | Hans Niemann | ½–½ | Emilio Cordova | Round 1: Hans Niemann - Emilio Cordova | Sicilian Defense: O'Kelly Variation, Maróczy Bind, Paulsen Line | |
| Jun 25, 2023 | Srivatshav Rahul | 0–1 | Hans Niemann | 16th Annual Philadelphia International | King's Indian Defense: Petrosian Variation, Stein Defense | |
| Jun 24, 2023 | Hans Niemann | 1–0 | Michael Mulyar | 16th Annual Philadelphia International | Slav Defense: Quiet Variation, Pin Defense | |
| Jun 24, 2023 | Henry Wang | 0–1 | Hans Niemann | 16th Annual Philadelphia International | Queen's Pawn Game: London System | |
| Jun 18, 2023 | Daniel H Fernandez | ½–½ | Hans Niemann | Las Vegas National Open 2023 | Sicilian Defense: Moscow Variation | |
| Jun 18, 2023 | Hans Niemann | ½–½ | Emilio Cordova Daza | Las Vegas National Open 2023 | Queen's Indian Defense: Capablanca Variation | |
| Jun 17, 2023 | Semen Khanin | ½–½ | Hans Niemann | Las Vegas National Open 2023 | Nimzo-Indian Defense: Normal Variation, Classical Defense | |
| Jun 17, 2023 | Hans Niemann | ½–½ | Illia Nyzhnyk | Las Vegas National Open 2023 | Semi-Slav Defense: Quiet Variation | |
| Jun 17, 2023 | Arman Mikaelyan | 0–1 | Hans Niemann | Las Vegas National Open 2023 | Queen's Indian Defense: Fianchetto Variation, Kramnik Variation | |
| Jun 16, 2023 | Hans Niemann | ½–½ | Viktor Matviishen | Las Vegas National Open 2023 | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Jun 16, 2023 | Josiah Stearman | 0–1 | Hans Niemann | Las Vegas National Open 2023 | Sicilian Defense: Najdorf Variation, Freak Attack | |
| Jun 15, 2023 | Hans Niemann | 1–0 | Rochelle Wu | Las Vegas National Open 2023 | Sicilian Defense: Richter-Rauzer Variation | |
| Jun 15, 2023 | Avi Harrison Kaplan | 0–1 | Hans Niemann | Round 1: Avi Harrison Kaplan - Hans Niemann | Nimzo-Indian Defense | |
| Jun 13, 2023 | Mikhail Antipov | ½–½ | Hans Niemann | Playoff 2: Mikhail Antipov - Hans Niemann | Four Knights Game: Spanish Variation, Double Spanish | |
| Jun 13, 2023 | Hans Niemann | 1–0 | Mikhail Antipov | Playoff 1: Hans Niemann - Mikhail Antipov | Ruy Lopez: Berlin Defense, Mortimer Variation | |
| Jun 12, 2023 | Hans Niemann | ½–½ | Semen Khanin | Round 9: Hans Niemann - Semen Khanin | Ruy Lopez: Closed, Anti-Marshall | |
| Jun 12, 2023 | Zaven Andriasian | ½–½ | Hans Niemann | Round 8: GM Zaven Andriasian (2579) - GM Hans Niemann (2695) | Italian Game: Giuoco Pianissimo, Normal | |
| Jun 12, 2023 | Hans Niemann | ½–½ | Mikhail Antipov | Round 7: Hans Niemann - Mikhail Antipov | Sicilian Defense: Moscow Variation | |
| Jun 11, 2023 | Jianchao Zhou | ½–½ | Hans Niemann | Round 6: Jianchao Zhou - Hans Niemann | Semi-Slav Defense: Normal Variation | |
| Jun 11, 2023 | Hans Niemann | 1–0 | Nico Chasin | Round 5: Hans Niemann - Nico Chasin | Petrov's Defense: Classical Attack, Chigorin Variation | |
| Jun 10, 2023 | Daniel Fernandez | 0–1 | Hans Niemann | Round 4: Daniel Fernandez - Hans Niemann | Sicilian Defense: Moscow Variation | |
| Jun 10, 2023 | Hans Niemann | 1–0 | Josiah Stearman | Round 3: Hans Niemann - Josiah Stearman | Sicilian Defense: Moscow Variation | |
| Jun 9, 2023 | Max Lu | 0–1 | Hans Niemann | Round 2: Max Lu - Hans Niemann | Bogo-Indian Defense: Retreat Variation | |
| Jun 9, 2023 | Hans Niemann | 1–0 | Erick Zhao | Round 1: Hans Niemann - Erick Zhao | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Aug 6, 2021 | Hans Niemann | 1–0 | Varuzhan Akobian | Round 6 4-day: Hans Niemann - Varuzhan Akobian | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Aug 6, 2021 | Robert Hungaski | 0–1 | Hans Niemann | Round 5 4-day: Robert Hungaski - Hans Niemann | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Aug 6, 2021 | Hans Niemann | 1–0 | Dov Gorman | Round 4 4-day: Hans Niemann - Dov Gorman | English Opening: Neo-Catalan | |
| Aug 5, 2021 | Andy Dong | 0–1 | Hans Niemann | Round 3 4-day: Andy Dong - Hans Niemann | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Aug 5, 2021 | Hans Niemann | 1–0 | Eric Levin | Round 2 4-day: Hans Niemann - Eric Levin | Queen's Gambit Declined: Harrwitz Attack, Main Line | |
| Aug 5, 2021 | Orren Ravid | 0–1 | Hans Niemann | Round 1 4-day: Orren Ravid - Hans Niemann | English Opening: King's English Variation, Two Knights Variation | |
| Jul 3, 2021 | Hans Niemann | 1–0 | Jason Liang | 49th Annual World Open | Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation | |
| Jul 3, 2021 | Sahil Sinha | 0–1 | Hans Niemann | 49th Annual World Open | Nimzo-Indian Defense: Classical Variation, Noa Variation | |
| Jul 2, 2021 | Hans Niemann | ½–½ | Robert Shlyakhtenko | 49th Annual World Open | Tarrasch Defense: Two Knights Variation | |
| Jul 2, 2021 | William Morrison | 0–1 | Hans Niemann | 49th Annual World Open | Sicilian Defense: Najdorf Variation, Opocensky Variation | |
| Jul 1, 2021 | Hans Niemann | 1–0 | Rushaan Mahajan | 49th Annual World Open | Nimzo-Indian Defense: Normal Variation | |
| Jun 21, 2021 | Hans Niemann | ½–½ | Aram Hakobyan | Round 3.2: Hans Niemann - Aram Hakobyan | Ruy Lopez: Open Berlin Defense, l'Hermet Variation | |
| Jun 21, 2021 | Hong | 0–1 | Hans Niemann | Round 3.1: Hong, Andrew - Hans Niemann | Ruy Lopez: Closed, Anti-Marshall | |
| Jun 21, 2021 | Hans Niemann | 1–0 | Steven Zierk | Round 2.2: Hans Niemann - Steven Zierk | Rapport-Jobava System | |
| Jun 21, 2021 | Jason Wang | 0–1 | Hans Niemann | Round 2.1: Jason Wang - Hans Niemann | Slav Defense: Modern Line | |
| Jun 21, 2021 | Hans Niemann | 1–0 | James Dean | Round 1.2: Hans Niemann - James Dean | Slav Indian | |
| Jun 20, 2021 | Hans Niemann | 0–1 | Illya Nyzhnyk | Round 9: Hans Niemann - Illya Nyzhnyk | King's Indian Defense: Semi-Averbakh System | |
| Jun 20, 2021 | Alexander Katz | 0–1 | Hans Niemann | Round 8: Alexander Katz - Hans Niemann | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Jun 19, 2021 | Hans Niemann | 0–1 | Arthur Guo | Round 7: Hans Niemann - Arthur Guo | Catalan Opening: Closed | |
| Jun 19, 2021 | Aram Hakobyan | ½–½ | Hans Niemann | Round 6: Aram Hakobyan - Hans Niemann | Queen's Gambit Declined | |
| Jun 19, 2021 | Hans Niemann | 1–0 | Atulya Arya Shetty | Round 5: Hans Niemann - Atulya Arya Shetty | Semi-Slav Defense | |
| Jun 18, 2021 | Aleksandr Ostrovskiy | 0–1 | Hans Niemann | Round 4: Aleksandr Ostrovskiy - Hans Niemann | English Opening: Agincourt Defense | |
| Jun 18, 2021 | Hans Niemann | ½–½ | Justin Wang | Round 3: Hans Niemann - Justin Wang | Nimzo-Indian Defense: Normal Variation, Schlechter Defense | |
| Jun 17, 2021 | Joshua Colas | 0–1 | Hans Niemann | Round 2: Joshua Colas - Hans Niemann | Caro-Kann Defense: Panov Attack, Fianchetto Defense, Fianchetto Gambit | |
| Jun 17, 2021 | Hans Niemann | 1–0 | Shelev Oberoi | Round 1: Hans Niemann - Shelev Oberoi | King's Indian Defense: Semi-Averbakh System | |
| Dec 30, 2020 | Luca Moroni | ½–½ | Hans Niemann | Vergani Cup - Round 9: Luca Moroni - Hans Niemann | Queen's Gambit Declined: Janowski Variation | |
| Dec 30, 2020 | Hans Niemann | 1–0 | Pier Luigi Basso | Vergani Cup - Round 8: Hans Niemann - Pier Luigi Basso | Réti Opening | |
| Dec 29, 2020 | Antonio Loiacono | 0–1 | Hans Niemann | Vergani Cup - Round 7: Antonio Loiacono - Hans Niemann | Four Knights Game: Spanish Variation, Rubinstein Variation | |
| Dec 29, 2020 | Hans Niemann | 1–0 | Nicolo Orfini | Vergani Cup - Round 6: Hans Niemann - Nicolo Orfini | King's Indian Defense: Semi-Averbakh System | |
| Dec 28, 2020 | Florent Samoun | ½–½ | Hans Niemann | Vergani Cup - Round 5: Florent Samoun - Hans Niemann | English Opening: King's English Variation, Two Knights Variation, Smyslov System | |
| Dec 28, 2020 | Hans Niemann | 0–1 | Daniel Dardha | Vergani Cup - Round 4: Hans Niemann - Daniel Dardha | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Gurgenidze Variation | |
| Dec 27, 2020 | Vitalj Bernadsky | ½–½ | Hans Niemann | Vergani Cup - Round 3: Vitalj Bernadsky - Hans Niemann | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | |
| Dec 27, 2020 | Anthony Mitran | 0–1 | Hans Niemann | Vergani Cup - Round 2: Anthony Mitran - Hans Niemann | Rapport-Jobava System | |
| Dec 26, 2020 | Hans Niemann | 1–0 | Lorenzo Persico | Vergani Cup - Round 1: Hans Niemann - Lorenzo Persico | Queen's Gambit Declined: Exchange Variation, Reshevsky Variation | |