| Jun 26, 2026 | Klaska | 1–0 | Sukiasyan | Round 11: Klaska, Philipp Leon - Sukiasyan, Vahe A. | Ruy Lopez: Closed | |
| Jun 25, 2026 | Molitor | 0–1 | Klaska | Round 10: Molitor, Milo - Klaska, Philipp Leon | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Jun 24, 2026 | Klaska | 1–0 | Vommaro | Round 9: Klaska, Philipp Leon - Vommaro, Stanislao | Sicilian Defense: Modern Variations | |
| Jun 23, 2026 | Topuz | 1–0 | Klaska | World Youth Chess Championship 2026 U18 Open | King's Indian Defense: Smyslov Variation | |
| Jun 22, 2026 | Klaska | 1–0 | Camps Abadia | Round 7: Klaska, Philipp Leon - Camps Abadia, Arnau | Caro-Kann Defense: Tartakower Variation | |
| Jun 20, 2026 | Magold | 1–0 | Klaska | Round 6: Magold, Filip - Klaska, Philipp Leon | Sicilian Defense: Classical Variation | |
| Jun 19, 2026 | Adilbekuly | 0–1 | Klaska | Round 5: Adilbekuly, Altair - Klaska, Philipp Leon | Sicilian Defense: Richter-Rauzer Variation | |
| Jun 18, 2026 | Klaska | 0–1 | Mamedov | Round 4: Klaska, Philipp Leon - Mamedov, Edgar | Ruy Lopez: Cozio Defense | |
| Jun 17, 2026 | Klaska | 1–0 | Vijay | Round 3: Klaska, Philipp Leon - Vijay, Rege | Caro-Kann Defense: Tartakower Variation | |
| Jun 16, 2026 | Habans Aguerrea | 1–0 | Klaska | Round 2: Habans Aguerrea, Javier - Klaska, Philipp Leon | English Opening: King's English Variation, Nimzowitsch Variation | |
| Jun 15, 2026 | Klaska | 1–0 | Amangeldinov | Round 1: Klaska, Philipp Leon - Amangeldinov, Alkey | Ruy Lopez: Closed | |
| May 29, 2026 | Klaska | 1–0 | Walter | DEM U18 2026 | Caro-Kann Defense: Classical Variation, Main Line | |
| May 28, 2026 | Deschler | 0–1 | Klaska | DEM U18 2026 | Sicilian Defense: Classical Variation | |
| May 27, 2026 | Klaska | ½–½ | Moeller | DEM U18 2026 | French Defense: King's Indian Attack | |
| May 27, 2026 | Atoyan | ½–½ | Klaska | DEM U18 2026 | Sicilian Defense: Closed | |
| May 26, 2026 | Klaska | 1–0 | Peilert | DEM U18 2026 | Caro-Kann Defense: Endgame Offer | |
| May 25, 2026 | Sommer | 1–0 | Klaska | DEM U18 2026 | Sicilian Defense: Richter-Rauzer Variation | |
| May 24, 2026 | Klaska | ½–½ | Musiienko | DEM U18 2026 | Ruy Lopez: Morphy Defense | |
| May 24, 2026 | Holzwarth | 0–1 | Klaska | DEM U18 2026 | Benko Gambit Declined: Sosonko Variation | |
| May 15, 2026 | Klaska | 1–0 | Strehse | DEM U18 2026 | Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation | |
| Apr 11, 2026 | Klaska | ½–½ | Boeren | Round 9: Klaska, Philipp Leon - Boeren, Jurriaan | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Apr 6, 2026 | Klaska | 0–1 | Giorgadze | Grenke Chess Festival 2026 Open | French Defense: King's Indian Attack | |
| Apr 5, 2026 | Klaska | ½–½ | Cantin | Grenke Chess Festival 2026 Open | French Defense: King's Indian Attack | |
| Apr 4, 2026 | Klaska | 0–1 | Degraeve | Grenke Chess Festival 2026 Open | Ruy Lopez: Closed, Anti-Marshall | |
| Apr 4, 2026 | Oz | 0–1 | Klaska | Grenke Chess Festival 2026 Open | Philidor Defense: Lion Variation | |
| Feb 8, 2026 | Klaska | 0–1 | Amin | Deutsche Schach-Bundesliga | Ruy Lopez: Morphy Defense, Steinitz Deferred | |
| Feb 7, 2026 | Onyshchuk | 1–0 | Klaska | Deutsche Schach-Bundesliga | Sicilian Defense: Classical Variation, Fianchetto Variation | |
| Jan 6, 2026 | Holtel | 1–0 | Klaska | 36. Staufer Open 2026 A | English Opening: King's English Variation | |
| Jan 5, 2026 | Klaska | ½–½ | Kolb | 36. Staufer Open 2026 A | Caro-Kann Defense: Endgame Offer | |
| Jan 5, 2026 | Lumachi | ½–½ | Klaska | 36. Staufer Open 2026 A | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Jan 4, 2026 | Klaska | 1–0 | Stork | 36. Staufer Open 2026 A | Sicilian Defense: French Variation | |
| Jan 4, 2026 | Harsh Suresh | ½–½ | Klaska | 36. Staufer Open 2026 A | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Jan 3, 2026 | Klaska | 1–0 | Chassard | 36. Staufer Open 2026 A | Sicilian Defense: Moscow Variation | |
| Jan 3, 2026 | Fiekers | 0–1 | Klaska | 36. Staufer Open 2026 A | Caro-Kann Defense: Panov Attack, Modern Defense | |
| Jan 2, 2026 | Lange | ½–½ | Klaska | 36. Staufer Open 2026 A | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Dec 30, 2025 | Klaska | ½–½ | Turel | DVM U16 2025 | Rapport-Jobava System | |
| Dec 29, 2025 | Matiashvili | 0–1 | Klaska | DVM U16 2025 | Sicilian Defense: Prins Variation | |
| Dec 29, 2025 | Klaska | ½–½ | Brau | DVM U16 2025 | Pirc Defense | |
| Dec 28, 2025 | Klaska | 1–0 | Fruth | DVM U16 2025 | Trompowsky Attack: Classical Defense | |
| Dec 28, 2025 | Kellner | 0–1 | Klaska | DVM U16 2025 | Bird Opening: Horsefly Defense | |
| Dec 27, 2025 | Klaska | 1–0 | Zhang | DVM U16 2025 | Ruy Lopez: Closed | |
| Dec 27, 2025 | Bemmann | 0–1 | Klaska | DVM U16 2025 | Sicilian Defense: Delayed Alapin Variation, with d6 | |
| Dec 26, 2025 | Bosch | 1–0 | Klaska | Round 5: Bosch, Jeroen - Klaska, Philipp Leon | Queen's Gambit Declined: Chigorin Defense, Main Line | |
| Dec 21, 2025 | Tiarks | 0–1 | Klaska | Round 5: Tiarks, Jann-Christian - Klaska, Philipp Leon | Sicilian Defense: Smith-Morra Gambit | |
| Dec 12, 2025 | Klaska | ½–½ | Menzel | Round 4: Klaska, Philipp Leon - Menzel, Maximilian | Trompowsky Attack | |
| Dec 12, 2025 | Riemay | ½–½ | Klaska | Round 3: Riemay, David - Klaska, Philipp Leon | Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | |
| Dec 12, 2025 | Klaska | 1–0 | Schmitz | Round 2: Klaska, Philipp Leon - Schmitz, Philipp | Sicilian Defense: Moscow Variation, Main Line | |
| Dec 12, 2025 | Gramb | 0–1 | Klaska | Round 1: Gramb, Marius - Klaska, Philipp Leon | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Dec 7, 2025 | Stevic | 1–0 | Klaska | Deutsche Schach-Bundesliga | Sicilian Defense: Moscow Variation, Main Line | |
| Dec 6, 2025 | Klaska | 0–1 | Babula | Deutsche Schach-Bundesliga | Sicilian Defense: Open | |
| Nov 22, 2025 | Klaska | 0–1 | L'Ami | Round 4: Klaska, Philipp Leon - L'Ami, Erwin | Sicilian Defense: Moscow Variation, Main Line | |
| Nov 7, 2025 | Klaska | 1–0 | Grooten | KNSB competitie 2025/2026 | Sicilian Defense: French Variation | |
| Oct 15, 2025 | Klaska | 0–1 | Tran Ngoc Minh Duy | Round 11: Klaska, Philipp Leon - Tran Ngoc Minh Duy | Caro-Kann Defense: Endgame Variation | |
| Oct 13, 2025 | Tamas | ½–½ | Klaska | Round 9: Tamas, Christian-Arrydan - Klaska, Philipp Leon | Benko Gambit Accepted: Fully Accepted Variation | |
| Oct 12, 2025 | Klaska | ½–½ | Puzyrevsky | Round 8: Klaska, Philipp Leon - Puzyrevsky, Semyon | Ruy Lopez: Closed | |
| Oct 11, 2025 | Klaska | ½–½ | Rustamov | Round 7: Klaska, Philipp Leon - Rustamov, Rustam | Sicilian Defense: Moscow Variation | |
| Oct 9, 2025 | Dotzer | ½–½ | Klaska | Round 6: Dotzer, Lukas - Klaska, Philipp Leon | Sicilian Defense: Richter-Rauzer Variation | |
| Sep 28, 2025 | Klaska | 1–0 | Lindgren | SBL | Ruy Lopez: Closed | |
| Sep 27, 2025 | Wisnet | 0–1 | Klaska | SBL | English Opening: Symmetrical Variation, Rubinstein Variation | |
| Jul 11, 2025 | Ivancic | 0–1 | Klaska | Round 7: Ivancic, Ivan - Klaska, Philipp Leon | Sicilian Defense: Richter-Rauzer Variation | |
| Jul 10, 2025 | Klaska | 0–1 | Mulawa | Round 6: Klaska, Philipp Leon - Mulawa, Cyprian | Sicilian Defense: Alapin Variation | |
| Jul 9, 2025 | Klaska | 1–0 | Morkunas | Round 5: Klaska, Philipp Leon - Morkunas, Gustas | Ruy Lopez: Morphy Defense, Modern Steinitz Defense | |
| Jul 8, 2025 | Kolimar | 1–0 | Klaska | Round 4: Kolimar, Kristof Pal - Klaska, Philipp Leon | Benoni Defense: Fianchetto Variation | |
| Jul 7, 2025 | Negrean | 0–1 | Klaska | Round 3: Negrean, Andrei - Klaska, Philipp Leon | English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3 | |
| Jul 6, 2025 | Klaska | 1–0 | Hlebec | Round 2: Klaska, Philipp Leon - Hlebec, Jure | French Defense: Winawer Variation, Alekhine-Maróczy Gambit | |
| Jul 5, 2025 | Leitgeb | 0–1 | Klaska | Round 1: Leitgeb, Julian - Klaska, Philipp Leon | Sicilian Defense: Kan Variation, Polugaevsky Variation | |
| Jun 14, 2025 | Klaska | ½–½ | Nunez Gregoire | DEM U16 2025 | Ruy Lopez: Morphy Defense | |
| Jun 13, 2025 | Atoyan | ½–½ | Klaska | DEM U16 2025 | Benko Gambit Accepted: King Walk Variation | |
| Jun 12, 2025 | Klaska | 1–0 | Mester | DEM U16 2025 | Dutch Defense: Staunton Gambit, Alekhine Variation | |
| Jun 11, 2025 | Sauer | ½–½ | Klaska | DEM U16 2025 | Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack | |
| Jun 10, 2025 | Skembris | 0–1 | Klaska | DEM U16 2025 | Sicilian Defense: Accelerated Dragon | |
| Jun 9, 2025 | Klaska | ½–½ | Zobel | DEM U16 2025 | Nimzo-Indian Defense: St. Petersburg Variation | |
| Jun 8, 2025 | Fruth | ½–½ | Klaska | DEM U16 2025 | Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation | |
| Jun 8, 2025 | Klaska | 1–0 | Blodig | DEM U16 2025 | Rapport-Jobava System | |
| Jun 6, 2025 | Klaska | ½–½ | Korchynskyi | DEM U16 2025 | Nimzo-Indian Defense: Reshevsky Variation | |
| May 13, 2025 | Ernst | 1–0 | Klaska | KNSB Meesterklasse 2024-2025 | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Apr 20, 2025 | Merario Alarcon | 1–0 | Klaska | Round 6: Merario Alarcon, Andres - Klaska, Philipp Leon | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Apr 18, 2025 | Klaska | 0–1 | Di Nicolantonio | Round 3: Klaska, Philipp Leon - Di Nicolantonio, Lucas | Semi-Slav Defense: Meran Variation | |
| Mar 8, 2025 | Klaska | 1–0 | Elgersma | Round 7: Klaska, Philipp Leon - Elgersma, Onno | French Defense: Classical Variation, Burn Variation, Morozevich Line | |
| Jan 6, 2025 | Klaska | 0–1 | Gut | 35. Staufer Open 2025 | Sicilian Defense: Najdorf Variation, Adams Attack | |
| Jan 5, 2025 | Klaska | ½–½ | Rindhiya V | 35. Staufer Open 2025 | Ruy Lopez: Closed | |
| Feb 8, 2025 | Klaska | ½–½ | Bokorovics | Round 6: Klaska, Philipp Leon - Bokorovics, Bertalan | Sicilian Defense: Modern Variations | |
| Nov 23, 2024 | Klaska | ½–½ | Lombaers | KNSB Meesterklasse 2024-2025 | Sicilian Defense: Nyezhmetdinov-Rossolimo Attack | |
| Oct 6, 2024 | Bornholdt | 0–1 | Klaska | Deutsche Ländermeisterschaft 2024 | English Opening: Symmetrical Variation, Hedgehog Defense | |
| Oct 5, 2024 | Klaska | 1–0 | Sauer | Deutsche Ländermeisterschaft 2024 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Oct 5, 2024 | Goldmann | 0–1 | Klaska | Deutsche Ländermeisterschaft 2024 | Sicilian Defense: Hyperaccelerated Fianchetto | |
| Oct 4, 2024 | Klaska | ½–½ | Baranyai-Molnar | Deutsche Ländermeisterschaft 2024 | Sicilian Defense: French Variation | |
| Oct 4, 2024 | Mohylnyi | 0–1 | Klaska | Deutsche Ländermeisterschaft 2024 | Sicilian Defense: Hyperaccelerated Fianchetto | |
| Oct 3, 2024 | Klaska | ½–½ | Fruth | Deutsche Ländermeisterschaft 2024 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| Oct 3, 2024 | Groeschel | 0–1 | Klaska | Deutsche Ländermeisterschaft 2024 | Sicilian Defense: Hyperaccelerated Dragon | |
| Sep 28, 2024 | Dordevic | ½–½ | Klaska | Deutsche Schachbundesliga 24-25 | Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation | |
| Sep 21, 2024 | Klaska | ½–½ | Geirnaert | KNSB Meesterklasse 2024-2025 | Ruy Lopez: Open, Howell Attack | |
| May 25, 2024 | Braeutigam | ½–½ | Klaska | DEM U16 2024 | English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6 | |
| May 24, 2024 | Klaska | 1–0 | Deschler | DEM U16 2024 | Caro-Kann Defense: Classical Variation, Spassky Variation | |
| May 23, 2024 | Semling | ½–½ | Klaska | DEM U16 2024 | Sicilian Defense: Hyperaccelerated Dragon | |
| May 22, 2024 | Klaska | ½–½ | Sauer | DEM U16 2024 | Sicilian Defense: Taimanov Variation | |
| May 22, 2024 | von Mettenheim | ½–½ | Klaska | DEM U16 2024 | Yusupov-Rubinstein System | |
| May 21, 2024 | Klaska | 1–0 | Lutze | DEM U16 2024 | Sicilian Defense: Accelerated Dragon, Maróczy Bind | |
| May 20, 2024 | Sommer | ½–½ | Klaska | DEM U16 2024 | Caro-Kann Defense: Accelerated Panov Attack, Modern Variation | |
| May 19, 2024 | Klaska | ½–½ | Torosyan | DEM U16 2024 | Sicilian Defense: French Variation | |