| Apr 27, 2026 | Theon | 1–0 | Lewis | Round 8: Theon, Pierre - Lewis, Andrew P | King's Indian Defense: Normal Variation, Standard Development | |
| Apr 23, 2026 | Gazik | ½–½ | Theon | Round 5: Gazik, Igor - Theon, Pierre | Sicilian Defense: Grand Prix Attack | |
| Apr 22, 2026 | Vukovic | 1–0 | Theon | Round 4: Vukovic, Zdravko - Theon, Pierre | Sicilian Defense: Snyder Variation | |
| Apr 20, 2026 | Roos | ½–½ | Theon | Round 2: Roos, Jean-Luc - Theon, Pierre | English Opening: Anglo-Indian Defense, King's Indian Formation | |
| Nov 1, 2025 | Pomes Marcet | ½–½ | Theon | Round 11: Pomes Marcet, Joan - Theon, Pierre | English Defense | |
| Oct 31, 2025 | Theon | 1–0 | Hartung-Nielsen | Round 10: Theon, Pierre - Hartung-Nielsen, Jens | Sicilian Defense: Hyperaccelerated Fianchetto | |
| Oct 30, 2025 | Bakalar | 0–1 | Theon | Round 9: Bakalar, Jan - Theon, Pierre | Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line | |
| Oct 29, 2025 | Theon | ½–½ | Fischer | Round 8: Theon, Pierre - Fischer, Robert J | Vienna Game: Falkbeer Variation | |
| Oct 28, 2025 | Orpinas Konig | 1–0 | Theon | Round 7: Orpinas Konig, Claudio Javier - Theon, Pierre | Catalan Opening | |
| Oct 26, 2025 | Theon | 1–0 | Kaldis | Round 6: Theon, Pierre - Kaldis, Georgios | Lion Defense: Bayonet Attack | |
| Oct 25, 2025 | Evertsson | ½–½ | Theon | Round 5: Evertsson, Rune - Theon, Pierre | English Opening: Symmetrical Variation, Anti-Benoni Variation | |
| Oct 24, 2025 | Theon | 0–1 | Nasybullin | Round 4: Theon, Pierre - Nasybullin, Vladislav | Sicilian Defense: Najdorf Variation | |
| Oct 23, 2025 | Miltner | ½–½ | Theon | Round 3: Miltner, Arndt - Theon, Pierre | East Indian Defense | |
| Oct 22, 2025 | Theon | 1–0 | Renaud | Round 2: Theon, Pierre - Renaud, Jacques | French Defense: Advance Variation, Milner-Barry Gambit, Hector Variation | |
| Oct 21, 2025 | Fontanesi | ½–½ | Theon | Round 1: Fontanesi, Riccardo - Theon, Pierre | King's Indian Defense: Sämisch Variation, Normal Defense | |
| Feb 25, 2025 | Theon | 1–0 | Karnaukh | World Senior Team 2025 S65 | Czech Defense | |
| Feb 24, 2025 | Theon | 0–1 | Baum | World Senior Team 2025 S65 | French Defense: Advance Variation, Milner-Barry Gambit, Main Line | |
| Feb 23, 2025 | Pregl | ½–½ | Theon | World Senior Team 2025 S65 | Sicilian Defense: Dragon Variation | |
| Feb 21, 2025 | Theon | ½–½ | Baker | World Senior Team 2025 S65 | Scotch Game: Scotch Gambit, Advance Variation | |
| Feb 19, 2025 | Frisen | 0–1 | Theon | World Senior Team 2025 S65 | Nimzo-Indian Defense: Classical Variation | |
| Feb 18, 2025 | Roos | 1–0 | Theon | World Senior Team 2025 S65 | Zukertort Opening: Reversed Grünfeld | |
