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| Date | Chess tournament name | Status |
|---|---|---|
| 2021-04-10 to 2021-04-28 | European Amateur Online Chess Championship - 10-28 April - Group C 1701-2000  |
Finished |
| 2020-10-29 to 2020-11-01 | 2.Heidelberger Schachherbst - Internationales Open - A-Turnier |
Finished |
| Date | Players & Opening | Result | ECO | View |
|---|---|---|---|---|
| No results | No results | No results | No results | No results |
| Date | Players & Opening | Result | ECO | View |
|---|---|---|---|---|
| 1989.01.01 | Schubbe, Bruno vs Arriens, Klaus Landes-Einzelmeister Sicilian |
0-1 | B50 | |
| 1993.01.01 | Schade, Werner vs Arriens, Klaus Landes-Einzelmeister King's Indian Saemisch |
1/2-1/2 | E81 | |
| 1989.01.01 | Kastenbein, Rainer vs Arriens, Klaus Landes-Einzelmeister King's Indian Schwarz |
1-0 | E73 | |
| 1989.01.01 | Maeder, Torsten vs Arriens, Klaus Landes-Einzelmeister Sicilian Alapin |
0-1 | B22 | |
| 1993.01.01 | Haverland, Artur vs Arriens, Klaus Landes-Einzelmeister Indian East Indian |
1/2-1/2 | A48 | |
| 1993.01.01 | Haase, Erich vs Arriens, Klaus Landes-Einzelmeister King's Indian Schwarz - Accelerated Averbakh |
1-0 | E70 | |
| 1989.01.01 | Arriens, Klaus vs Schakel, Ralph Landes-Einzelmeister Sicilian - Labourdonnais |
0-1 | B32 | |
| 1989.01.01 | Arriens, Klaus vs Koster, Frank Landes-Einzelmeister Sicilian |
1/2-1/2 | B33 | |
| 1989.01.01 | Arriens, Klaus vs Potschka, Dieter Landes-Einzelmeister French Classical - Vistaneskis |
0-1 | C13 | |
| 1989.01.01 | Arriens, Klaus vs Harders, Werner Landes-Einzelmeister Sicilian Classical - Two Knights |
0-1 | B58 | |
| 1989.01.01 | Arriens, Klaus vs Coldewey, Brar Landes-Einzelmeister Irregular King's Knight - Latvian |
1-0 | C40 | |
| 1993.01.01 | Arriens, Klaus vs Sprengel, Hans Landes-Einzelmeister Two Knights - Modern Bishop |
0-1 | C55 | |
| 1993.01.01 | Arriens, Klaus vs Skozinski, Gunter Landes-Einzelmeister Caro-Kann Knight Classical |
1/2-1/2 | B18 | |
| 1993.01.01 | Arriens, Klaus vs Semmelhaack, Erwin Landes-Einzelmeister Sicilian |
1/2-1/2 | B33 | |
| 1993.01.01 | Arriens, Klaus vs Hofmann, George Landes-Einzelmeister Spanish Morphy - Anderssen |
1-0 | C77 | |
| 1989.01.01 | Aewerdieck, Udo vs Arriens, Klaus Landes-Einzelmeister English Anglo-Indian (Queen's Knight) |
1/2-1/2 | A16 |