| Leiden 1909 (2) |
Leiden Hauptturnier |
5 | / | 9 |
| | | |
| Hamburg 1910 (8) |
17th German Chess Federation Congress - Hauptturnier B, Section 6 |
6.5 | / | 9 |
| | | |
| Amsterdam 1910 (1) |
Amsterdam Tournament - Section 1 |
3 | / | 7 |
| | | |
| Cologne 1911 (1) |
Cologne Congress - Hauptturnier A |
8.5 | / | 16 |
| | | |
| Tunbridge Wells 1912 |
14th Kent County Chess Association Tournament - 1st Class Open |
5 | / | 8 |
| | | |
| London 1912 (1) |
England - Netherlands Team Match |
| | | | | | |
|
Schelfhout, W.A.T. - Macdonald, E.E. |
1.5 - 0.5 |
| | | |
| Scheveningen 1913 (1) |
Scheveningen Tournament |
1 | / | 12 |
| | | |
| Cheltenham 1913 (2) |
10th British Chess Federation Tournament - Major Open |
4.5 | / | 10 |
| | | |
| Mannheim 1914 (2) |
19th German Chess Federation Congress - Hauptturnier A |
5.5 | / | 10 |
| | | |
| Amsterdam 1915 |
Amsterdam Tournament |
1.5 | / | 5 |
| | | |
| Amsterdam 1916 |
Netherland Chess Federation Congress - Championship |
6 | / | 11 |
| | | |
| Amsterdam 1917 |
Amsterdam Tournament |
2 | / | 3 |
| | | |
| Utrecht 1917 (1) |
Netherlands Chess Federation Tournament |
2 | / | 5 |
| | | |
| Arnhem 1918 (1) |
Netherlands Chess Federation Congress - Hauptturnier A |
2.5 | / | 5 |
| | | |
| Rotterdam 1919 |
Rotterdam Tournament |
2 | / | 7 |
| | | |
| The Hague 1919 |
4th Netherlands Championship |
2.5 | / | 7 |
| | | |
| Amsterdam 1919 (1) |
1st Silver Queen Tournament |
5 | / | 9 |
| | | |
| Amsterdam 1919 (2) |
United Amsterdam Chess Club Tournament |
1.5 | / | 5 |
| | | |
| Amsterdam 1920 (1) |
Amsterdam Tournament |
0.5 | / | 6 |
| | | |
| The Hague 1920 |
Netherland Chess Federation Congress - Section A |
4.5 | / | 7 |
| | | |
| Amsterdam 1920 (3) |
United Amsterdam Chess Club Winter Tournament |
8 | / | 11 |
| | | |
| Amsterdam 1920 (4) |
3rd Silver Queen Tournament |
3 | / | 6 |
| | | |
| Nijmegen 1921 (1) |
5th Netherland Chess Federation Congress - Championship A |
2.5 | / | 7 |
| | | |
| Bussum 1921 |
Bussum Tournament |
1.5 | / | 3 |
| | | |
| Utrecht 1921 |
Utrecht Tournament |
2 | / | 3 |
| | | |
| Amsterdam 1921 (2) |
United Amsterdam Chess Club Winter Tournament |
5 | / | 9 |
| | | |
| Amsterdam 1922 |
United Amsterdam Chess Club Winter Tournament |
5 | / | 10 |
| | | |
| Berlin 1922 (2) |
Germany - Holland Match |
| | | | | | |
|
Schelfhout, W.A.T. - Wegemund, O. |
0.5 - 1.5 |
| | | |
| Brussels 1924 (1) |
Belgium - Holland Team Match |
| | | | | | |
|
Schelfhout, W.A.T. - Verschueren, E. |
0.5 - 0.5 |
| | | |
| Rotterdam 1924 (1) |
Rotterdam Tournament |
3.5 | / | 5 |
| | | |
| Amsterdam 1924 (2) |
United Amsterdam Chess Club Winter Tournament |
6.5 | / | 16 |
| | | |
| Amsterdam 1926 (1) |
Amsterdam Tournament |
0.5 | / | 3 |
| | | |
| Utrecht 1926 |
7th Netherlands Championship |
6 | / | 11 |
| | | |
| Brussels 1926 |
Belgium - Holland Team Match |
| | | | | | |
|
Schelfhout, W.A.T. - Louviau, A. |
1 - 0 |
| | | |
| Amsterdam 1926 (3) |
United Amsterdam Chess Club Winter Tournament |
4 | / | 8 |
| | | |
| London 1927 (3) |
1st Olympiad |
1.5 | / | 2 |
| | | |
