12 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Halldorsson, Halldor | Petrovskiy, Vadym | 0-1 | B51 | X Open Semana Santa 2026 - Grupo A | 2026-04-01 |
| Halldorsson, Halldor | Steinberg, Nitzan | 0-1 | B51 | Round 1: Halldorsson, Halldor - Steinberg, Nitzan | 2025-10-19 |
| Halldorsson, Halldor | Lascar, Radoslawa | 1-0 | B30 | Round 9: Halldorsson, Halldor - Lascar, Radoslawa | 2025-04-20 |
| Halldorsson, Halldor | Gonzalez Perdomo, Sergio | 0-1 | B30 | Round 7: Halldorsson, Halldor - Gonzalez Perdomo, Sergio | 2025-04-18 |
| Halldorsson, Halldor | Barski, Radoslaw | 0-1 | B30 | Round 5: Halldorsson, Halldor - Barski, Radoslaw | 2025-04-16 |
| Halldorsson, Halldor | Sanchez Ramirez, Gustavo | 1-0 | B01 | Round 3: Halldorsson, Halldor - Sanchez Ramirez, Gustavo | 2025-04-14 |
| Halldorsson, Halldor | Rodriguez Trujillo, Cristian | 1-0 | C86 | Round 1: Halldorsson, Halldor - Rodriguez Trujillo, Cristian | 2025-04-12 |