| Date | Chess tournament name | Status | 
|---|---|---|
| 2022-04-03 to 2022-04-09 | SSS - Weggis 1 ![]()  | 
                                                                                                Finished | 
| 2022-02-14 to 2022-02-24 | SSS - Zürich 2 ![]()  | 
                                                                                                Finished | 
| 2019-04-21 to 2019-04-28 | Group D - ACO World Amateur Chess Championship Rhodes 2019 ![]()  | 
                                                                                                Finished | 
| 2018-07-23 to 2018-08-01 | Main Tournament (ATO) ![]()  | 
                                                                                                Finished | 
| 2018-07-23 to 2018-08-01 | Main Tournament (ATO) ![]()  | 
                                                                                                Finished | 
| 2017-07-24 to 2017-08-02 | Main Tournament Tournoi général Allgemeines Turnier ![]()  | 
                                                                                                Finished | 
| 2014-09-28 to 2014-10-04 | SEM 2014: Hauptturnier II ![]()  | 
                                                                                                Finished | 
| 2013-11-22 to 2013-11-24 | 11e Open du Jura ![]()  | 
                                                                                                Finished | 
| Date | Players & Opening | Result | ECO | View | 
|---|---|---|---|---|
| No results | No results | No results | No results | No results | 
| Date | Players & Opening | Result | ECO | View | 
|---|---|---|---|---|
| 1990.01.01 | Svendsen vs Hadorn, Marcel Zurich French Closed Tarrasch - Pawn Center  | 
                                                                                                                                                1-0 | C05 | |
| 1991.04.01 | Salov, S. (2255) vs Hadorn, D. Bad Ragaz m French Closed Tarrasch - Pawn Center  | 
                                                                                                                                                1-0 | C05 | |
| 1991.04.01 | Salov, S. (2255) vs Hadorn, D. Bad Ragaz m French Open Tarrasch (Exchange)  | 
                                                                                                                                                1-0 | C09 | |
| 1990.01.01 | Meier vs Hadorn, Marcel Zurich French Advance Winawer - Franco-Indian  | 
                                                                                                                                                0-1 | C16 | |
| 1991.04.01 | Hadorn, D. vs (2255) Salov, S. Bad Ragaz m King's Indian Yugoslav  | 
                                                                                                                                                1-0 | E97 | |
| 1991.04.01 | Hadorn, D. vs (2255) Salov, S. Bad Ragaz m King's Indian Fianchetto (Classical) - Classical  | 
                                                                                                                                                1/2-1/2 | E69 | |
| 1990.01.01 | Hadorn vs Hoffmann Hungary Indian East Indian  | 
                                                                                                                                                1-0 | A48 | |
| 1992.01.01 | Hadorn vs Ambroz, J. Bern Old Benoni Pawn Thrust - Blockade  | 
                                                                                                                                                0-1 | A44 | |
| 1988.01.01 | Bakros, I. vs Hadorn Varmdo King's Indian Schwarz - Kramer  | 
                                                                                                                                                0-1 | E70 |