| 30 ago 2026 | Iliev, Hristiyan 2337 | Piorun, Kacper 2539 | ½-½ | B06 Modern Defense: Modern Pterodactyl | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Blitz | 120 | Ver |
| 30 ago 2026 | Aakash Sharadchandra, Dalvi 2248 | Piorun, Kacper 2539 | 1-0 | E90 King's Indian Defense: Normal Variation, Rare Defenses | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Blitz | 34 | Ver |
| 30 ago 2026 | Piorun, Kacper 2539 | Injac, Teodora 2301 | 1-0 | A45 Trompowsky Attack | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Blitz | 67 | Ver |
| 30 ago 2026 | Halkias, Stelios 2465 | Piorun, Kacper 2539 | 1-0 | E90 King's Indian Defense: Normal Variation, Rare Defenses | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Blitz | 70 | Ver |
| 30 ago 2026 | Piorun, Kacper 2539 | Chatalbashev, Boris 2410 | 1-0 | A45 Trompowsky Attack: Classical Defense, Big Center Variation | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Blitz | 70 | Ver |
| 30 ago 2026 | Piorun, Kacper 2539 | Sydoryka, Vladyslav 2425 | 1-0 | A45 Trompowsky Attack: Classical Defense, Big Center Variation | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Blitz | 45 | Ver |
| 30 ago 2026 | Tsolakidou, Stavroula 2403 | Piorun, Kacper 2539 | 0-1 | B06 Modern Defense: Modern Pterodactyl | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Blitz | 23 | Ver |
| 30 ago 2026 | Piorun, Kacper 2539 | Oliinyk, Serafym 2302 | 1-0 | D00 Queen's Pawn Game: Levitsky Attack | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Blitz | 43 | Ver |
| 29 ago 2026 | Sydoryka, Vladyslav 2361 | Piorun, Kacper 2516 | 1-0 | A10 English Opening: Great Snake Variation | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Rapid | 90 | Ver |
| 29 ago 2026 | Piorun, Kacper 2516 | Tsolakidou, Stavroula 2355 | 0-1 | C50 Italian Game: Giuoco Pianissimo | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Rapid | 40 | Ver |
| 29 ago 2026 | Jacobson, Brandon 2493 | Piorun, Kacper 2516 | 1-0 | C25 Vienna Game: Max Lange Defense | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Rapid | 41 | Ver |
| 29 ago 2026 | Piorun, Kacper 2516 | Stoyanov, Tsvetan 2437 | 1-0 | C42 Petrov's Defense: Millennium Attack | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Rapid | 49 | Ver |
| 29 ago 2026 | Piorun, Kacper 2516 | Veljanoski, Andrej 2341 | 1-0 | C50 Italian Game: Giuoco Pianissimo, Italian Four Knights Variation | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Rapid | 22 | Ver |
| 29 ago 2026 | Mamedov, Rauf 2611 | Piorun, Kacper 2516 | 1-0 | C50 Italian Game: Giuoco Pianissimo | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Rapid | 30 | Ver |
| 29 ago 2026 | Ljepic, Andrej 2395 | Piorun, Kacper 2516 | 0-1 | B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Rapid | 65 | Ver |
| 29 ago 2026 | Piorun, Kacper 2516 | Javakhishvili, Lela 2317 | 1-0 | B40 Sicilian Defense: French Variation | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Rapid | 50 | Ver |
| 29 ago 2026 | Georgiev, Biser 2154 | Piorun, Kacper 2516 | 0-1 | B30 Sicilian Defense: Old Sicilian | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Rapid | 36 | Ver |
| 28 ago 2026 | Firouzja, Alireza 2793 | Piorun, Kacper 2539 | 1-0 | D02 Queen's Pawn Game: London System | Sofia Cup 2026 - Balkan Rapid & Blitz Championships | Blitz | 24 | Ver |
| 9 ago 2026 | Piorun, Kacper 2519 | Korchynskyi, Mykola 2408 | 1-0 | C17 French Defense: Winawer Variation, Bogoljubow Variation | Sparkassen Chess Trophy 2026 | Open A | 47 | Ver |
| 8 ago 2026 | Agibileg, Uurtsaikh 2432 | Piorun, Kacper 2519 | ½-½ | A40 Horwitz Defense | Sparkassen Chess Trophy 2026 | Open A | 42 | Ver |