| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 1. W Olsson vs E Blomqvist |
| 0-1 | 20 | 2017 | Hasselbacken Open | A04 Reti Opening |
| 2. W Olsson vs A Ziegler |
| 0-1 | 31 | 2019 | Gothenburg op | A04 Reti Opening |
| 3. W Olsson vs A Falkevall |
| 1-0 | 50 | 2021 | ch-SWE Junior U20 | E06 Catalan, Closed, 5.Nf3 |
| 4. T Ernst vs W Olsson |
| 0-1 | 54 | 2021 | Uppsala IM Gp2 | B77 Sicilian, Dragon, Yugoslav Attack |
| 5. J M Seo vs W Olsson |
| ½-½ | 43 | 2022 | 50th Rilton Cup | D12 Queen's Gambit Declined Slav |
| 6. W Olsson vs M Wiedenkeller |
| 1-0 | 63 | 2022 | 50th Rilton Cup | A20 English |
| 7. P Galperin vs W Olsson |
| ½-½ | 30 | 2022 | 50th Rilton Cup | A06 Reti Opening |
| 8. W Olsson vs I Gorshtein |
| ½-½ | 42 | 2023 | 50th Rilton Cup | A11 English, Caro-Kann Defensive System |
| 9. N Meshkovs vs W Olsson |
| 1-0 | 61 | 2023 | 50th Rilton Cup | D43 Queen's Gambit Declined Semi-Slav |
| 10. W Olsson vs H Sorensen |
| 1-0 | 66 | 2023 | 50th Rilton Cup | A20 English |
| 11. T Hillarp Persson vs W Olsson |
| ½-½ | 51 | 2023 | Swedish Championship | A09 Reti Opening |
| 12. W Olsson vs V Sivuk |
| 0-1 | 28 | 2023 | Swedish Championship | E04 Catalan, Open, 5.Nf3 |
| 13. K Kucuksari vs W Olsson |
| 1-0 | 27 | 2023 | Swedish Championship | D10 Queen's Gambit Declined Slav |
| 14. W Olsson vs L Johansson |
| 1-0 | 59 | 2023 | Swedish Championship | A25 English |
| 15. J M Seo vs W Olsson |
| 1-0 | 49 | 2023 | Swedish Championship | B76 Sicilian, Dragon, Yugoslav Attack |
| 16. E Blomqvist vs W Olsson |
| 0-1 | 65 | 2023 | Swedish Championship | B78 Sicilian, Dragon, Yugoslav Attack, 10.castle long |
| 17. W Olsson vs J Hector |
| 1-0 | 40 | 2023 | Swedish Championship | A20 English |
| 18. T Ernst vs W Olsson |
| ½-½ | 47 | 2023 | Swedish Championship | C54 Giuoco Piano |
| 19. W Olsson vs M Pantzar |
| ½-½ | 52 | 2023 | Swedish Championship | A13 English |
| 20. J Hector vs W Olsson |
| 1-0 | 57 | 2023 | SS Manhem IM | B22 Sicilian, Alapin |
| 21. B de Boer vs W Olsson |
| 0-1 | 33 | 2023 | Rilton Cup 2023/24 | D12 Queen's Gambit Declined Slav |
| 22. W Olsson vs J Sai Agni Jeevitesh |
| ½-½ | 39 | 2023 | Rilton Cup 2023/24 | A13 English |
| 23. Z Lim vs W Olsson |
| ½-½ | 38 | 2023 | Rilton Cup 2023/24 | D43 Queen's Gambit Declined Semi-Slav |
| 24. W Olsson vs J Marn |
| 1-0 | 52 | 2023 | Rilton Cup 2023/24 | E01 Catalan, Closed |
| 25. P Bailet vs W Olsson |
| 0-1 | 51 | 2023 | Rilton Cup 2023/24 | A07 King's Indian Attack |
Kibitzing
