Overview
Genre
| 2# | 1 | Overview | Omit | Problems |
| 3# | 1 | Overview | Omit | Problems |
Authors
| Heathcote, Godfrey F. | 1 | Overview | Omit | Problems |
| Penrose, Lionel Sharples | 1 | Overview | Omit | Problems |
Sources
| London Observer | 2 | Overview | Omit | Problems |
| Neues Wiener Tagblatt | 1 | Overview | Omit | Problems |
| Simple Two-move Themes | 1 | Overview | Omit | Problems |
| The Problemist | 1 | Overview | Omit | Problems |
| Versunkene Schätze | 1 | Overview | Omit | Problems |
| Het Belgisch Schaakbord | 1 | Overview | Omit | Problems |
Keywords
| Sammlung Brian Stephenson | 2 | Overview | Omit | Problems |
| Echomatt | 1 | Overview | Omit | Problems |
Computer tested
| C+ | 2 | Overview | Omit | Problems |
Cooked
| not cooked | 2 | Overview | Omit | Problems |
https://pdb.dieschwalbe.de/overview.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+NOT+S%3D%27Kudesnik%27+AND+S%3D%27London+Observer%27