| 26 jun 2026 | Zambrana, Osvaldo 2444 | Hernandez Ojeda, Garry Anatholy 2173 | 1-0 | C03 Defensa Francesa: Tarrasch Variation, Morozevich Variation | WR Chess Marathon Perú 2026 | Rapid #1 | 39 | Ver |
| 26 jun 2026 | Quirhuayo Chumbe, German Gonzalo 2354 | Zambrana, Osvaldo 2444 | 1-0 | B33 Defensa Siciliana: Lasker-Pelikan Variation | WR Chess Marathon Perú 2026 | Rapid #1 | 43 | Ver |
| 26 jun 2026 | Zambrana, Osvaldo 2444 | Cabezas Solano, David Alejandro 2197 | 1-0 | B94 Defensa Siciliana: Najdorf Variation | WR Chess Marathon Perú 2026 | Rapid #1 | 45 | Ver |
| 26 jun 2026 | Zambrana, Osvaldo 2444 | Ouellet, Maili-Jade 2214 | ½-½ | B33 Defensa Siciliana: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation | WR Chess Marathon Perú 2026 | Rapid #1 | 40 | Ver |
| 29 mar 2026 | Monroy G., Javier A. 2015 | Zambrana, Osvaldo 2365 | 0-1 | A46 Defensa India: Knights Variation | Final del Campeonato Nacional Mayores BOLIVIA 2026 | Absoluto | 40 | Ver |
| 28 mar 2026 | Zambrana, Osvaldo 2365 | Montevilla Cahuasa, Jonathan I. 2182 | 1-0 | B35 Defensa Siciliana: Accelerated Dragon, Modern Bc4 Variation | Final del Campeonato Nacional Mayores BOLIVIA 2026 | Absoluto | 36 | Ver |
| 28 mar 2026 | Zambrana, Osvaldo 2365 | Claure Verastegui, Rene David 2190 | ½-½ | B92 Defensa Siciliana: Najdorf Variation, Opocensky Variation, Traditional Line | Final del Campeonato Nacional Mayores BOLIVIA 2026 | Absoluto | 25 | Ver |
| 27 mar 2026 | Ticona Rocabado, Licael Roderick 2399 | Zambrana, Osvaldo 2365 | ½-½ | E10 Defensa India: Anti-Nimzo-Indian | Final del Campeonato Nacional Mayores BOLIVIA 2026 | Absoluto | 30 | Ver |
| 26 mar 2026 | Zambrana, Osvaldo 2365 | Gemy, Jose Daniel 2333 | ½-½ | C54 Apertura Italiana: Classical Variation, Giuoco Pianissimo | Final del Campeonato Nacional Mayores BOLIVIA 2026 | Absoluto | 12 | Ver |
| 25 mar 2026 | Zambrana, Osvaldo 2365 | Titichoca Daza, Daniel 2090 | ½-½ | B77 Defensa Siciliana: Dragon Variation, Yugoslav Attack, Czerniak Variation | Final del Campeonato Nacional Mayores BOLIVIA 2026 | Absoluto | 30 | Ver |
| 25 mar 2026 | Mayta Aiza, Maveric 2200 | Zambrana, Osvaldo 2365 | ½-½ | B22 Defensa Siciliana: Alapin Variation, Barmen Defense | Final del Campeonato Nacional Mayores BOLIVIA 2026 | Absoluto | 48 | Ver |
| 24 mar 2026 | Zambrana, Osvaldo 2365 | Bolanos, Fernando 2202 | 1-0 | C54 Apertura Italiana: Classical Variation, Giuoco Pianissimo | Final del Campeonato Nacional Mayores BOLIVIA 2026 | Absoluto | 53 | Ver |