| Apr 8, 2026 | Bogner | 1–0 | Katz | Round 3: Bogner, Sebastian - Katz, Alexander | Queen's Gambit Declined: Three Knights Variation | |
| Apr 6, 2026 | Katz | ½–½ | Sivuk | X Open Semana Santa 2026 - Grupo A | Sicilian Defense: Richter-Rauzer Variation, Modern Variation | |
| Apr 5, 2026 | Safarov | 0–1 | Katz | X Open Semana Santa 2026 - Grupo A | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Apr 4, 2026 | Piorun | 1–0 | Katz | X Open Semana Santa 2026 - Grupo A | English Opening: Agincourt Defense, Catalan Defense Accepted | |
| Apr 3, 2026 | Katz | ½–½ | Chen | X Open Semana Santa 2026 - Grupo A | Philidor Defense: Lion Variation | |
| Apr 3, 2026 | Fedorchuk | ½–½ | Katz | X Open Semana Santa 2026 - Grupo A | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Apr 2, 2026 | Katz | 1–0 | Sala Esquiva | X Open Semana Santa 2026 - Grupo A | Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation | |
| Oct 12, 2025 | Katz | ½–½ | Adewumi | Round 8: Katz, Alexander - Adewumi, Tanitoluwa | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Oct 12, 2025 | Brodsky | ½–½ | Katz | Round 7: Brodsky, David - Katz, Alexander | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Oct 12, 2025 | Katz | 1–0 | Zhu | Round 6: Katz, Alexander - Zhu, Linxi | Sicilian Defense: Moscow Variation | |
| Oct 12, 2025 | Katz | 1–0 | Kozlek | Round 5: Katz, Alexander - Kozlek, Tommy | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Oct 12, 2025 | Nasta | ½–½ | Katz | Round 4: Nasta, Kiren Vivek - Katz, Alexander | Pirc Defense: Classical Variation, Quiet System | |
| Oct 12, 2025 | Smith | 0–1 | Katz | Round 2: Smith, Daniel - Katz, Alexander | Pirc Defense: Classical Variation, Quiet System | |
| Oct 12, 2025 | Katz | 1–0 | Lee | Round 1: Katz, Alexander - Lee, Rohan | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Oct 12, 2025 | George | ½–½ | Katz | Round 7: George, Kevin - Katz, Alexander | Catalan Opening: Open Defense, Classical Line | |
| Oct 11, 2025 | Katz | 0–1 | Nasta | Round 6: Katz, Alexander - Nasta, Kiren Vivek | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Oct 11, 2025 | Dixit | 0–1 | Katz | Round 5: Dixit, Arun - Katz, Alexander | Pirc Defense: Byrne Variation | |
| Oct 11, 2025 | Katz | 1–0 | Ulloa Centeno | Round 2: Katz, Alexander - Ulloa Centeno, Leandro Nicolas | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | |
| Oct 11, 2025 | Smith | 0–1 | Katz | Round 1: Smith, Daniel - Katz, Alexander | Rapport-Jobava System | |
| Oct 9, 2025 | Bortnyk | 1–0 | Katz | Round 9: Bortnyk, Mykola - Katz, Alexander | Pirc Defense | |
| Oct 9, 2025 | Katz | 0–1 | Chasin | Round 3: Katz, Alexander - Chasin, Nico | Sicilian Defense: Najdorf Variation | |
| Oct 9, 2025 | Katz | 0–1 | Bortnyk | Round 4: Katz, Alexander - Bortnyk, Mykola | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Oct 9, 2025 | Chasin | 0–1 | Katz | Round 3: Chasin, Nico - Katz, Alexander | Nimzo-Indian Defense: Kmoch Variation | |
| Jul 13, 2025 | Katz | ½–½ | Nagy | Round 9: Katz, Alexander - Nagy, Gabor | Four Knights Game: Scotch Variation Accepted | |
| Jul 12, 2025 | Stearman | ½–½ | Katz | Round 8: Stearman, Josiah - Katz, Alexander | Ruy Lopez: Morphy Defense | |
| Jul 12, 2025 | Katz | 1–0 | Sun | Round 7: Katz, Alexander - Sun, Ryan | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Jul 10, 2025 | Sheehan | 0–1 | Katz | Round 5: Sheehan, Ethan - Katz, Alexander | Indian Defense: London System | |
| Jul 10, 2025 | Katz | ½–½ | Gauri | Round 4: Katz, Alexander - Gauri, Shankar | Ruy Lopez: Open Berlin Defense, Showalter Variation | |
| Jul 9, 2025 | Kaplan | 1–0 | Katz | Round 3: Kaplan, Avi Harrison - Katz, Alexander | Zukertort Opening: Nimzo-Larsen Variation | |
| Jul 9, 2025 | Katz | 0–1 | Plat | Round 2: Katz, Alexander - Plat, Vojtech | Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred | |
| Jul 8, 2025 | Cruz | 1–0 | Katz | Round 1: Cruz, Cristhian - Katz, Alexander | English Opening: King's English Variation | |
| Jul 7, 2025 | Lin | ½–½ | Katz | Round 6: Lin, Bryan Enming - Katz, Alexander | Ruy Lopez: Morphy Defense | |
| May 26, 2025 | Brady | ½–½ | Katz | 12th Cherry Blossom Classic | French Defense: Tarrasch Variation, Chistyakov Defense | |
| May 26, 2025 | Wang | ½–½ | Katz | 12th Cherry Blossom Classic | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| May 25, 2025 | Katz | ½–½ | Popilski | 12th Cherry Blossom Classic | French Defense: Burn Variation | |
| May 25, 2025 | Katz | 1–0 | Samuelson | 12th Cherry Blossom Classic | Sicilian Defense: Moscow Variation | |
| May 24, 2025 | Stremavicius | 1–0 | Katz | 12th Cherry Blossom Classic | Indian Defense: Knights Variation | |
| May 24, 2025 | Katz | 1–0 | Semenov | 12th Cherry Blossom Classic | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| May 23, 2025 | Diao | ½–½ | Katz | 12th Cherry Blossom Classic | Indian Defense: Dzindzi-Indian Defense | |
| May 23, 2025 | Katz | ½–½ | Slade | 12th Cherry Blossom Classic | Ruy Lopez: Berlin Defense | |
| May 22, 2025 | Li | 0–1 | Katz | 12th Cherry Blossom Classic | Pirc Defense: 150 Attack, Sveshnikov-Jansa Attack | |
| Apr 27, 2025 | Katz | 0–1 | Macias Pino | Round 9: Katz, Alexander - Macias Pino, Diego | Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | |
| Apr 25, 2025 | Katz | 1–0 | Zanan | Round 6: Katz, Alexander - Zanan, Evgeny | Scotch Game: Scotch Gambit, Advance Variation | |
| Apr 25, 2025 | Katz | ½–½ | Royal | Round 8: Katz, Alexander - Royal, Shreyas | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| Apr 25, 2025 | Bharath Subramaniyam H | 1–0 | Katz | Round 7: Bharath Subramaniyam H - Katz, Alexander | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Apr 24, 2025 | Katz | ½–½ | Dragnev | Round 4: Katz, Alexander - Dragnev, Valentin | Saragossa Opening | |
| Apr 23, 2025 | Ivanchuk | 1–0 | Katz | Round 2: Ivanchuk, Vasyl - Katz, Alexander | Bird Opening: Dutch Variation | |
| Apr 21, 2025 | Katz | ½–½ | Berdayes Ason | Semana Santa A. 2025 | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Jan 20, 2025 | Katz | ½–½ | Mardov | Round 9: Katz, Alexander - Mardov, Dimitar | Four Knights Game: Scotch Variation Accepted | |
| Jan 20, 2025 | Shlyakhtenko | 1–0 | Katz | Round 8: Shlyakhtenko, Robert - Katz, Alexander | Nimzo-Indian Defense: Sämisch Variation | |
| Jan 19, 2025 | Katz | 0–1 | Chasin | Round 7: Katz, Alexander - Chasin, Nico | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation | |
| Jan 19, 2025 | Schnaider | ½–½ | Katz | Round 6: Schnaider, Ilan - Katz, Alexander | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Jan 18, 2025 | Katz | 0–1 | Kevlishvili | Round 5: Katz, Alexander - Kevlishvili, Robby | Ruy Lopez: Closed, Smyslov Defense | |
| Jan 18, 2025 | Cordova | ½–½ | Katz | Round 4: Cordova, Emilio - Katz, Alexander | English Opening: Anglo-Indian Defense, King's Knight Variation | |
| Jan 17, 2025 | Katz | 1–0 | Ostrovskiy | Round 3: Katz, Alexander - Ostrovskiy, Aleksandr | Caro-Kann Defense: Advance Variation | |
| Jan 17, 2025 | Escobar Forero | 0–1 | Katz | Round 2: Escobar Forero, Alder - Katz, Alexander | Caro-Kann Defense: Breyer Variation | |
| Jan 16, 2025 | Katz | 0–1 | Park | Round 1: Katz, Alexander - Park, Evan | Ruy Lopez: Morphy Defense, Schliemann Defense Deferred | |
| Mar 21, 2024 | Yilmazyerli | ½–½ | Katz | Reykjavik Open 2024 | Queen's Gambit Declined: Cambridge Springs Defense, Rubinstein Variation | |
| Mar 20, 2024 | Katz | 1–0 | Li | Reykjavik Open 2024 | Ruy Lopez: Closed | |
| Mar 19, 2024 | Ptacnikova | 0–1 | Katz | Reykjavik Open 2024 | Rapport-Jobava System | |
| Mar 18, 2024 | Katz | 1–0 | Pourkashiyan | Reykjavik Open 2024 | Italian Game: Classical Variation, Giuoco Pianissimo | |
| Mar 18, 2024 | Katz | 0–1 | Pultinevicius | Reykjavik Open 2024 | Caro-Kann Defense: Advance Variation, Short Variation | |
| Mar 17, 2024 | Gikas | 0–1 | Katz | Reykjavik Open 2024 | Sicilian Defense: Dragon Variation, Yugoslav Attack | |
| Mar 16, 2024 | Katz | 0–1 | Sanal | Reykjavik Open 2024 | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| Mar 16, 2024 | Mai | 0–1 | Katz | Reykjavik Open 2024 | Nimzowitsch Defense: Williams Variation | |
| Mar 15, 2024 | Katz | 1–0 | Kolka | Reykjavik Open 2024 | Italian Game: Classical Variation, Giuoco Pianissimo, with d6 | |
| Dec 29, 2024 | Yim | 1–0 | Katz | 34th Annual North American Open | Slav Defense: Quiet Variation | |
| Dec 28, 2024 | Katz | 0–1 | Quesada Perez | Round 5: Katz, Alexander - Quesada Perez, Yasser | Italian Game: Two Knights Defense, Modern Bishop's Opening | |
| Dec 27, 2024 | Katz | 1–0 | Gutla | 34th Annual North American Open | Italian Game: Classical Variation, Giuoco Pianissimo, with h6 | |
| Dec 27, 2024 | Lee | ½–½ | Katz | 34th Annual North American Open | Petrov's Defense: Modern Attack, Center Variation | |
| Dec 27, 2024 | Atwell | ½–½ | Katz | Round 4: Atwell, Rose - Katz, Alexander | Tarrasch Defense: Classical Variation, Réti Variation | |
| Oct 13, 2024 | Katz | 1–0 | Weisz | Round 1: Katz, Alexander - Weisz, Bryan | Zukertort Opening: Kingside Fianchetto | |
| Oct 13, 2024 | Katz | 1–0 | Meduri | Round 4: Katz, Alexander - Meduri, Aakaash | Pirc Defense | |
| Oct 13, 2024 | Katz | 1–0 | Gaw | Round 6: Katz, Alexander - Gaw, Chloe | Scandinavian Defense: Valencian Variation, Main Line | |
| Oct 13, 2024 | Katz | 0–1 | Bortnyk | Round 7: Katz, Alexander - Bortnyk, Mykola | Alekhine Defense: Exchange Variation | |
| Oct 13, 2024 | Katz | ½–½ | Morris-Suzuki | Round 10: Katz, Alexander - Morris-Suzuki, Alan H | Sicilian Defense: Najdorf Variation, English Attack | |
| Oct 13, 2024 | Katz | 0–1 | Chasin | Round 12: Katz, Alexander - Chasin, Nico | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Oct 13, 2024 | Weisz | ½–½ | Katz | Round 2: Weisz, Bryan - Katz, Alexander | Tarrasch Defense: Classical Variation, Advance Variation | |
| Oct 13, 2024 | Meduri | ½–½ | Katz | Round 3: Meduri, Aakaash - Katz, Alexander | Indian Defense | |
| Oct 13, 2024 | Gaw | 0–1 | Katz | Round 5: Gaw, Chloe - Katz, Alexander | Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation | |
| Oct 13, 2024 | Bortnyk | 1–0 | Katz | Round 8: Bortnyk, Mykola - Katz, Alexander | Pirc Defense | |
| Oct 13, 2024 | Morris-Suzuki | 0–1 | Katz | Round 9: Morris-Suzuki, Alan H - Katz, Alexander | King's Indian Attack | |
| Oct 13, 2024 | Chasin | ½–½ | Katz | Round 11: Chasin, Nico - Katz, Alexander | English Opening: Mikenas-Carls Variation | |
| Oct 13, 2024 | Hoffmann | 0–1 | Katz | Round 13: Hoffmann, Asa - Katz, Alexander | Trompowsky Attack | |
| Oct 12, 2024 | Katz | 1–0 | Chen | Round 1: Katz, Alexander - Chen, Alex | Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line | |
| Oct 12, 2024 | Katz | 1–0 | Chasin | Round 3: Katz, Alexander - Chasin, Nico | Sicilian Defense: Taimanov Variation, Bastrikov Variation | |
| Oct 12, 2024 | Katz | 1–0 | Bortnyk | Round 4: Katz, Alexander - Bortnyk, Mykola | Alekhine Defense | |
| Oct 12, 2024 | Katz | ½–½ | Hardaway | Round 7: Katz, Alexander - Hardaway, Brewington | Ruy Lopez: Morphy Defense, Cozio Defense | |
| Oct 12, 2024 | Bonin | 0–1 | Katz | Round 2: Bonin, Jay - Katz, Alexander | Van Geet Opening | |
| Oct 12, 2024 | Tang | 0–1 | Katz | Round 5: Tang, Andrew - Katz, Alexander | Indian Defense: London System | |
| Oct 12, 2024 | George Micheal | ½–½ | Katz | Round 6: George Micheal, Kevin - Katz, Alexander | Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line | |
| Aug 23, 2022 | Levin | ½–½ | Katz | Mirandela2022 | Neo-Grünfeld Defense: Classical Variation, Original Defense | |
| Aug 22, 2022 | Katz | ½–½ | Prusikin | Mirandela2022 | Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid | |
| Aug 21, 2022 | Katz | 1–0 | Pinto | Mirandela2022 | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | |
| Aug 21, 2022 | Checa | ½–½ | Katz | Mirandela2022 | Bogo-Indian Defense: Retreat Variation | |
| Aug 20, 2022 | Seo | ½–½ | Katz | Mirandela2022 | Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line | |
| Aug 19, 2022 | Katz | ½–½ | Quesada Perez | Mirandela2022 | Sicilian Defense: Taimanov Variation | |
| Aug 19, 2022 | Silva | 0–1 | Katz | Mirandela2022 | Catalan Opening: Open Defense | |
| Aug 18, 2022 | Katz | 1–0 | Grezels | Mirandela2022 | Sicilian Defense: Taimanov Variation | |
| Aug 18, 2022 | Huber | 0–1 | Katz | Mirandela2022 | Sicilian Defense: Alapin Variation, Barmen Defense | |