| Jun 30, 2026 | Leighton | ½–½ | Cummings | Canadian Jr. and Sr. Championship 2026 | English Opening: Neo-Catalan | |
| Jun 29, 2026 | Cummings | 1–0 | Glew | Canadian Jr. and Sr. Championship 2026 | Pirc Defense: Classical Variation, Quiet System | |
| Jun 29, 2026 | McLaren | 0–1 | Cummings | Canadian Jr. and Sr. Championship 2026 | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Jun 28, 2026 | Cummings | 1–0 | McKay | Canadian Jr. and Sr. Championship 2026 | English Opening: Symmetrical Variation, Three Knights Variation | |
| Jun 28, 2026 | Dunn | 0–1 | Cummings | Canadian Jr. and Sr. Championship 2026 | Rapport-Jobava System | |
| Jun 28, 2026 | Yearwood | ½–½ | Cummings | Canadian Jr. and Sr. Championship 2026 | Bird Opening: Dutch Variation | |
| Jun 27, 2026 | Dunn | 0–1 | Cummings | Canadian Jr. and Sr. Championship 2026 | Rapport-Jobava System | |
| Jun 27, 2026 | Dunn | 0–1 | David | Canadian Jr. and Sr. Championship 2026 | Rapport-Jobava System | |
| Jun 27, 2026 | Cummings | 1–0 | Glew | Canadian Jr. and Sr. Championship 2026 | Pirc Defense: Classical Variation, Quiet System | |
| Jun 27, 2026 | McLaren | 0–1 | Cummings | Canadian Jr. and Sr. Championship 2026 | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Jun 27, 2026 | Cummings | 1–0 | Safarzadeh | Canadian Jr. and Sr. Championship 2026 | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| Jun 27, 2026 | Yearwood | ½–½ | Cummings | Canadian Jr. and Sr. Championship 2026 | Bird Opening: Dutch Variation | |
| Jun 27, 2026 | Cummings | 1–0 | McKay | Canadian Jr. and Sr. Championship 2026 | English Opening: Symmetrical Variation, Three Knights Variation | |
| Apr 12, 2026 | Cummings | 0–1 | Rios Gomez | Round 9: Cummings, David H. - Rios Gomez, Cristhian Camilo | King's Indian Defense: Normal Variation, Rare Defenses | |
| Apr 11, 2026 | Zheng | ½–½ | Cummings | 2026 Sydney International Open Championships | Semi-Slav Defense: Normal Variation | |
| Apr 11, 2026 | Cummings | ½–½ | Annapureddy | 2026 Sydney International Open Championships | Rapport-Jobava System | |
| Apr 9, 2026 | Rusakov | ½–½ | Cummings | 2026 Sydney International Open Championships | Caro-Kann Defense: Panov Attack, Modern Defense | |
| Apr 9, 2026 | Cummings | 0–1 | Mitrabha | 2026 Sydney International Open Championships | King's Indian Defense: Makogonov Variation | |
| Apr 8, 2026 | Lane | 0–1 | Cummings | 2026 Sydney International Open Championships | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Apr 8, 2026 | Cummings | 1–0 | Wang | 2026 Sydney International Open Championships | English Opening: Symmetrical Variation | |
| Apr 8, 2026 | Anderson | ½–½ | Cummings | 2026 Sydney International Open Championships | Indian Defense: Dzindzi-Indian Defense | |
| Feb 22, 2026 | Cummings | ½–½ | Mitev | Round 8: Cummings, David H. - Mitev, Valentin | King's Indian Defense: Normal Variation, Rare Defenses | |
| Feb 22, 2026 | Varnam | ½–½ | Cummings | Round 9: Varnam, Liam D - Cummings, David H. | Petrov's Defense: Classical Attack | |
| Feb 21, 2026 | Kendall | 0–1 | Cummings | Round 1: Kendall, Arthur - Cummings, David H. | Queen's Pawn Game: Colle System | |
| Feb 20, 2026 | Gormally | ½–½ | Cummings | Round 7: Gormally, Daniel W - Cummings, David H. | Queen's Gambit Declined: Neo-Orthodox Variation, Main Line | |
| Feb 19, 2026 | Cummings | 1–0 | Vashisht-Pigem | Round 6: Cummings, David H. - Vashisht-Pigem, Raman | King's Indian Defense: Normal Variation, Rare Defenses | |
| Feb 19, 2026 | Burrows | ½–½ | Cummings | Round 5: Burrows, Martin P - Cummings, David H. | Caro-Kann Defense: Advance Variation, Short Variation | |
| Feb 18, 2026 | Cummings | 1–0 | Collyer | Round 4: Cummings, David H. - Collyer, David | King's Indian Defense: Normal Variation, Rare Defenses | |
| Feb 17, 2026 | Cummings | 0–1 | Koelle | Round 2: Cummings, David H. - Koelle, Tobias | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Oct 12, 2025 | Muthaiah AL | 1–0 | Cummings | Fagernes International Autumn 2025 | King's Indian Attack | |
| Oct 11, 2025 | Harish | ½–½ | Cummings | Fagernes International Autumn 2025 | Petrov's Defense: Modern Attack, Center Variation | |
| Oct 10, 2025 | Cummings | ½–½ | Fikh | Fagernes International Autumn 2025 | English Opening: King's English Variation, Four Knights Variation, Quiet Line | |
| Oct 9, 2025 | Hillarp Persson | 1–0 | Cummings | Fagernes International Autumn 2025 | King's Indian Attack | |
| Oct 8, 2025 | Cummings | 1–0 | Mahir Taneja | Fagernes International Autumn 2025 | Zukertort Opening | |
| Oct 8, 2025 | Harshavardhan G B | 1–0 | Cummings | Fagernes International Autumn 2025 | Catalan Opening | |
| Oct 7, 2025 | Cummings | ½–½ | Csonka | Fagernes International Autumn 2025 | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Oct 6, 2025 | Amar | ½–½ | Cummings | Fagernes International Autumn 2025 | Petrov's Defense: Modern Attack, Center Variation | |
| Oct 5, 2025 | Cummings | 1–0 | Sivaparan | Fagernes International Autumn 2025 | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Sep 1, 2025 | Cummings | ½–½ | Gavrilin | 2025 Toronto Open | English Opening: Agincourt Defense, Neo-Catalan Declined | |
| Sep 1, 2025 | Wiebe | 0–1 | Cummings | 2025 Toronto Open | Zukertort Opening | |
| May 31, 2025 | Cummings | ½–½ | Ladron De Guevara Pinto | Round 9: Cummings, David H. - Ladron De Guevara Pinto, Paolo | Zukertort Opening | |
| May 30, 2025 | Fernandez | 1–0 | Cummings | Round 8: Fernandez, Daniel Howard - Cummings, David H. | Vienna Game: Falkbeer Variation | |
| May 30, 2025 | Cummings | 1–0 | Fernandez Garcia | Round 7: Cummings, David H. - Fernandez Garcia, Jose Miguel | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| May 29, 2025 | Lazarus | 0–1 | Cummings | Round 6: Lazarus, Simon E - Cummings, David H. | English Opening: Agincourt Defense | |
| May 28, 2025 | Willow | ½–½ | Cummings | Round 5: Willow, Jonah B - Cummings, David H. | Petrov's Defense: Modern Attack, Center Variation | |
| May 28, 2025 | Cummings | ½–½ | Cuenca Jimenez | Round 4: Cummings, David H. - Cuenca Jimenez, Jose Fernando | English Opening: Agincourt Defense | |
| May 27, 2025 | Cummings | 1–0 | Pai | Round 3: Cummings, David H. - Pai, Sidhanth | English Opening: Symmetrical Variation | |
| May 26, 2025 | Chan | ½–½ | Cummings | Round 2: Chan, Sheng Liang Bernard - Cummings, David H. | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| May 26, 2025 | Cummings | ½–½ | Majeed | Round 1: Cummings, David H. - Majeed, Haroon | Queen's Gambit Declined: Charousek Variation | |
| Feb 26, 2025 | Cummings | 1–0 | Duong | WSTCC | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | |
| Feb 25, 2025 | Cummings | ½–½ | Van Haastert | WSTCC | Zukertort Opening | |
| Feb 23, 2025 | Cummings | ½–½ | Seul | WSTCC | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Feb 20, 2025 | Cummings | 1–0 | Czebe | WSTCC | English Opening: King's English Variation | |
| Feb 18, 2025 | Cummings | 0–1 | Temirbayev | WSTCC | King's Indian Defense: Normal Variation, Rare Defenses | |
| Apr 19, 2025 | Cummings | 0–1 | Noritsyn | Canadian Closed 2025 | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | |
| Apr 18, 2025 | Cummings | ½–½ | Rodrigue-Lemieux | Canadian Closed 2025 | English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation | |
| Nov 27, 2024 | Dimitrijeski | 1–0 | Cummings | World Senior Chess Championship 2024 | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Nov 26, 2024 | Cummings | 0–1 | Glek | World Senior Chess Championship 2024 | English Opening: King's English Variation, Kramnik-Shirov Counterattack | |
| Nov 25, 2024 | Piskov | ½–½ | Cummings | World Senior Chess Championship 2024 | Petrov's Defense: French Attack | |
| Nov 24, 2024 | Cummings | ½–½ | Vinter-Schou | World Senior Chess Championship 2024 | English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto | |
| Nov 22, 2024 | Naimanov | 0–1 | Cummings | World Senior Chess Championship 2024 | Caro-Kann Defense: Panov Attack, Modern Defense | |
| Nov 20, 2024 | Kaidanov | 1–0 | Cummings | World Senior Chess Championship 2024 | Nimzo-Indian Defense: Sämisch Variation | |
| Sep 2, 2024 | Barron | 0–1 | Cummings | Round 6: Barron, Michael - Cummings, David H. | Caro-Kann Defense: Exchange Variation, Rubinstein Variation | |
| Sep 2, 2024 | Cummings | ½–½ | Huang | Round 5: Cummings, David H. - Huang, Youhe | Zukertort Opening | |
| Sep 1, 2024 | Lu | * | Cummings | Round 4: Lu, Eddie - Cummings, David H. | Caro-Kann Defense | |
| Sep 1, 2024 | Cummings | ½–½ | Vettese | Round 3: Cummings, David H. - Vettese, Nicholas | English Opening: Caro-Kann Defensive System | |
| Aug 31, 2024 | Cummings | 1–0 | Yang | Round 1: Cummings, David H. - Yang, Larry | English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation | |
| Aug 31, 2024 | Bora | 1–0 | Cummings | Round 2: Bora, Safal - Cummings, David H. | Semi-Slav Defense: Stoltz Variation, Shabalov Attack | |
| Jul 11, 2024 | Godena | ½–½ | Cummings | 50-1 | Caro-Kann Defense: Tartakower Variation | |
| Jul 10, 2024 | Becker | ½–½ | Cummings | wstcc2024o50 | English Opening: Agincourt Defense | |
| Jul 9, 2024 | Cummings | ½–½ | Kaspi | 50-1 | English Opening: Agincourt Defense | |
| Jul 7, 2024 | Hjartarson | 1–0 | Cummings | 50-1 | Caro-Kann Defense: Advance Variation, Short Variation | |
| Jul 6, 2024 | Cummings | 1–0 | Marinello | wstcc2024o50 | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| Jul 5, 2024 | Davis | 0–1 | Cummings | wstcc2024o50 | Indian Defense: Knights Variation | |
| Jul 4, 2024 | Cummings | 1–0 | Ograbek | wstcc2024o50 | Modern Defense | |
| Jul 4, 2024 | Khachiyan | ½–½ | Cummings | 50-1 | Caro-Kann Defense: Advance Variation | |
| Jul 2, 2024 | Cummings | 1–0 | Norinkeviciute | wstcc2024o50 | Old Indian Defense: Normal Variation | |
| May 19, 2024 | Cummings | ½–½ | Moses | Round 3: Cummings, David H. - Moses, Neil | English Opening: Mikenas-Carls Variation | |
| May 18, 2024 | Campbell | 0–1 | Cummings | Round 1: Campbell, Ryan - Cummings, David H. | Nimzo-Indian Defense: Normal Variation, Botvinnik System | |
| Apr 1, 2024 | Cummings | ½–½ | Yang | Round 8: Cummings, David vs Yang, Jingyun (Ryan) | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Mar 31, 2024 | Sai Krishna G V | 1–0 | Cummings | 2024 Zonals | Caro-Kann Defense: Tartakower Variation | |
| Mar 30, 2024 | Cummings | ½–½ | Lawson | Round 6: Cummings, David H. - Lawson, Eric | Zukertort Opening | |
| Mar 30, 2024 | Vettese | 1–0 | Cummings | Round 5: Vettese, Nicholas - Cummings, David H. | Caro-Kann Defense: Advance Variation, Tal Variation | |
| Mar 29, 2024 | Cummings | 1–0 | Jodar Arias | 2024 Canadian Championship at Hart House, Toronto | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line | |
| Mar 28, 2024 | Clyde | 0–1 | Cummings | Round 1: Clyde, Jordan vs Cummings, David | Bird Opening: Dutch Variation | |
| Oct 30, 2023 | Yves Morin | ½–½ | David H. Cummings | 50+ World Senior Championship | Ponziani Opening: Jaenisch Counterattack | |
| Oct 29, 2023 | Cummings | ½–½ | Nikolaidis | 50+ World Senior Championship | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Oct 28, 2023 | Adams | 1–0 | Cummings | 50+ World Senior Championship | Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense | |
| Oct 27, 2023 | Cummings | 1–0 | Schnelzer | 50+ World Senior Championship | Slav Defense: Exchange Variation, Trifunovic Variation | |
| Oct 26, 2023 | Quijada Carvajal | * | Cummings | 50+ World Senior Championship | ? | |
| Oct 25, 2023 | Cummings | * | Papadimitriou | 50+ World Senior Championship | ? | |
| Apr 9, 2023 | Cummings | ½–½ | Verbin | Fagernes Chess International 2023 | English Opening: Four Knights System, Nimzowitsch Variation | |
| Apr 8, 2023 | Hacker | ½–½ | Cummings | Fagernes Chess International 2023 | Caro-Kann Defense: Endgame Variation | |
| Apr 7, 2023 | Cummings | 1–0 | Pujari | Fagernes Chess International 2023 | Queen's Gambit Declined: Exchange Variation, Positional Variation | |
| Apr 6, 2023 | Doshi | 1–0 | Cummings | Fagernes Chess International 2023 | Catalan Opening | |
| Apr 5, 2023 | Cummings | ½–½ | Panda | Fagernes Chess International 2023 | Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack | |
| Apr 4, 2023 | Cummings | ½–½ | Kulaots | Fagernes Chess International 2023 | English Opening: Adorjan Defense | |
| Apr 3, 2023 | Hillarp | ½–½ | Cummings | Fagernes Chess International 2023 | King's Indian Attack | |
| Apr 2, 2023 | Cummings | ½–½ | Ter-Sahakyan | Fagernes Chess International 2023 | Zukertort Opening | |
| — | Cummings | 1–0 | Yang | 2025 Toronto Open | English Opening: Symmetrical Variation, Four Knights Variation | |