Overview
Genre
| Fairies | 2 | Overview | Omit | Problems |
| n# | 2 | Overview | Omit | Problems |
| s# | 2 | Overview | Omit | Problems |
| h# | 1 | Overview | Omit | Problems |
Authors
| Johandl, Alois | 1 | Overview | Omit | Problems |
| Sphicas, George P. | 1 | Overview | Omit | Problems |
| Ettl, Gerald | 1 | Overview | Omit | Problems |
| Malcom, James | 1 | Overview | Omit | Problems |
| Boyer, Jean-Pierre | 1 | Overview | Omit | Problems |
| Babic, Milomir | 1 | Overview | Omit | Problems |
| Jordan, Raúl | 1 | Overview | Omit | Problems |
| Dietrich, Stephan | 1 | Overview | Omit | Problems |
Sources
| Phenix | 2 | Overview | Omit | Problems |
| Schach-Echo | 2 | Overview | Omit | Problems |
| feenschach | 2 | Overview | Omit | Problems |
| Mat Plus | 1 | Overview | Omit | Problems |
| Memorial J. Oudot | 1 | Overview | Omit | Problems |
| Die Schwalbe | 1 | Overview | Omit | Problems |
| Schachexpress (DBSB) | 1 | Overview | Omit | Problems |
| StrateGems | 1 | Overview | Omit | Problems |
Keywords
Computer tested
| not C+ | 4 | Overview | Omit | Problems |
| C+ | 4 | Overview | Omit | Problems |
Cooked
| not cooked | 8 | Overview | Omit | Problems |
https://pdb.dieschwalbe.de/overview.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+K%3D%27Unterverwandlung+im+Schl%C3%BCsselzug%27+AND+K%3D%27konsekutive+Umwandlungen+4%27