| 1 ago 2026 | Delgerdalai, Bayarjavkhlan 2385 | Klaska, Philipp Leon 2315 | ½-½ | A61 Defensa Benoni | European Youth Team Chess Championship - Open18 | 43 | Ver |
| 24 jul 2026 | Heinrich, John 2356 | Klaska, Philipp Leon 2315 | 1-0 | A23 Apertura Inglesa: King's English Variation, Two Knights Variation, Keres Variation | German Chess Championship 2026 | Candidates Men | 40 | Ver |
| 23 jul 2026 | Klaska, Philipp Leon 2315 | Neuhoff, Laertes 2306 | 1-0 | C78 Apertura Española (Ruy López): Morphy Defense, Neo-Arkhangelsk Variation | German Chess Championship 2026 | Candidates Men | 23 | Ver |
| 22 jul 2026 | Wagner, Benjamin 2285 | Klaska, Philipp Leon 2315 | 0-1 | C41 Defensa Philidor: Lion Variation | German Chess Championship 2026 | Candidates Men | 53 | Ver |
| 22 jul 2026 | Klaska, Philipp Leon 2315 | Dahl, Christoph 2393 | ½-½ | B50 Defensa Siciliana: Modern Variations | German Chess Championship 2026 | Candidates Men | 63 | Ver |
| 21 jul 2026 | Klaska, Philipp Leon 2315 | Uphoff, Lennart 2288 | 1-0 | A48 Sistema Londres | German Chess Championship 2026 | Candidates Men | 67 | Ver |
| 20 jul 2026 | Poetsch, Hagen 2444 | Klaska, Philipp Leon 2315 | ½-½ | B66 Defensa Siciliana: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations | German Chess Championship 2026 | Candidates Men | 60 | Ver |
| 20 jul 2026 | Herrmann, Arthur 2208 | Klaska, Philipp Leon 2315 | 0-1 | C41 Defensa Philidor: Lion Variation | German Chess Championship 2026 | Candidates Men | 36 | Ver |
| 19 jul 2026 | Klaska, Philipp Leon 2315 | Keyser, Robin 2181 | ½-½ | C07 Defensa Francesa: Tarrasch Variation, Chistyakov Defense | German Chess Championship 2026 | Candidates Men | 43 | Ver |
| 26 jun 2026 | Klaska, Philipp Leon 2298 | Sukiasyan, Vahe A. 2409 | 1-0 | C88 Apertura Española (Ruy López): Closed | FIDE World Youth Chess Championships 2026 | O18 | 21 | Ver |
| 25 jun 2026 | Molitor, Milo 2164 | Klaska, Philipp Leon 2298 | 0-1 | A30 Apertura Inglesa: Symmetrical Variation, Hedgehog Defense | FIDE World Youth Chess Championships 2026 | O18 | 50 | Ver |
| 24 jun 2026 | Klaska, Philipp Leon 2298 | Vommaro, Stanislao 2126 | 1-0 | B50 Defensa Siciliana: Modern Variations | FIDE World Youth Chess Championships 2026 | O18 | 27 | Ver |
| 23 jun 2026 | Topuz, Mirac Melih 2082 | Klaska, Philipp Leon 2298 | 1-0 | E61 Defensa India de Rey: Smyslov Variation | World Youth Chess Championship 2026 U18 Open | 31 | Ver |
| 22 jun 2026 | Klaska, Philipp Leon 2298 | Camps Abadia, Arnau 2159 | 1-0 | B15 Defensa Caro-Kann: Tartakower Variation | FIDE World Youth Chess Championships 2026 | O18 | 30 | Ver |
| 20 jun 2026 | Magold, Filip 2501 | Klaska, Philipp Leon 2298 | 1-0 | B56 Defensa Siciliana: Classical Variation | FIDE World Youth Chess Championships 2026 | O18 | 30 | Ver |
| 19 jun 2026 | Adilbekuly, Altair 2105 | Klaska, Philipp Leon 2298 | 0-1 | B62 Defensa Siciliana: Richter-Rauzer Variation | FIDE World Youth Chess Championships 2026 | O18 | 52 | Ver |
| 18 jun 2026 | Klaska, Philipp Leon 2298 | Mamedov, Edgar 2464 | 0-1 | C60 Apertura Española (Ruy López): Cozio Defense | FIDE World Youth Chess Championships 2026 | O18 | 51 | Ver |
| 17 jun 2026 | Klaska, Philipp Leon 2298 | Vijay, Rege 2111 | 1-0 | B15 Defensa Caro-Kann: Tartakower Variation | FIDE World Youth Chess Championships 2026 | O18 | 28 | Ver |
| 16 jun 2026 | Habans Aguerrea, Javier 2433 | Klaska, Philipp Leon 2298 | 1-0 | A20 Apertura Inglesa: King's English Variation, Nimzowitsch Variation | FIDE World Youth Chess Championships 2026 | O18 | 22 | Ver |
| 29 may 2026 | Klaska, Philipp Leon 2298 | Walter, Richard 2126 | 1-0 | B18 Defensa Caro-Kann: Classical Variation, Main Line | DEM U18 2026 | 42 | Ver |
