| 14 ago 2026 | Tarasenka, Aliaksandra 2235 | Kobak, Polina 2223 | 1-0 | C11 Defensa Francesa: Classical Variation, Burn Variation | European Junior Chess Championship 2026 | Girls | 41 | Ver |
| 13 ago 2026 | Kobak, Polina 2223 | Piddubna, Bozhena 2266 | 0-1 | E11 Defensa Bogoindia: Vitolins Variation | European Junior Chess Championship 2026 | Girls | 56 | Ver |
| 8 ago 2026 | Kobak, Polina 2223 | Blokhin, Sofia 2118 | 1-0 | A80 Defensa Holandesa: Hopton Attack | European Junior Chess Championship 2026 | Girls | 48 | Ver |
| 7 ago 2026 | Sipos, Stefania 2041 | Kobak, Polina 2223 | ½-½ | B33 Defensa Siciliana: Lasker-Pelikan Variation | European Junior Chess Championship 2026 | Girls | 51 | Ver |
| 4 ago 2026 | Kobak, Polina 2223 | Roebers, Eline 2371 | 0-1 | E71 Defensa India de Rey: Makogonov Variation | European Junior Chess Championship 2026 | Girls | 44 | Ver |
| 7 nov 2025 | Kobak, Polina 2129 | Negre, Emilie 2208 | 0-1 | E06 Apertura Catalana: Closed | European Youth Chess Championship 2025 | G18 | 66 | Ver |
| 25 sep 2025 | Agasarov, Benik 2416 | Kobak, Polina 2082 | 1-0 | A14 Apertura Inglesa: Agincourt Defense, Neo-Catalan Declined | Tsaghkadzor Open 2025 | 39 | Ver |
| 21 sep 2025 | Kobak, Polina 2082 | Ohanyan, Emin 2491 | 0-1 | D37 Gambito de Dama rehusado: Barmen Variation | Tsaghkadzor Open 2025 | 48 | Ver |