Overview
Genre
| s# | 24 | Overview | Omit | Problems |
Authors
| Petkow, Petko A. | 13 | Overview | Omit | Problems |
| Herzberg, Michael | 5 | Overview | Omit | Problems |
| Petkov, Petko A. | 4 | Overview | Omit | Problems |
| Gamnitzer, Camillo | 1 | Overview | Omit | Problems |
| Swindley, Cyril P. | 1 | Overview | Omit | Problems |
Sources
| Schach | 5 | Overview | Omit | Problems |
| Schach-Aktiv | 2 | Overview | Omit | Problems |
| Schweizerische Schachzeitung | 2 | Overview | Omit | Problems |
| The Problemist | 2 | Overview | Omit | Problems |
| Die Schwalbe | 2 | Overview | Omit | Problems |
| feenschach | 2 | Overview | Omit | Problems |
| FIDE Album 1989-1991 | 1 | Overview | Omit | Problems |
| idee & form | 1 | Overview | Omit | Problems |
| Int. GM und M für Schachkompositionen | 1 | Overview | Omit | Problems |
| Länderkampf Bulgarien-DDR | 1 | Overview | Omit | Problems |
| Petkov Selected Compositions | 1 | Overview | Omit | Problems |
| Phenix | 1 | Overview | Omit | Problems |
| Probleemblad | 1 | Overview | Omit | Problems |
| Rex Multiplex | 1 | Overview | Omit | Problems |
| Sakkelet | 1 | Overview | Omit | Problems |
| Springaren | 1 | Overview | Omit | Problems |
| Suomen Shakki | 1 | Overview | Omit | Problems |
| Schach-Echo | 1 | Overview | Omit | Problems |
| Schachmatna Misl | 1 | Overview | Omit | Problems |
Keywords
Computer tested
| C+ | 24 | Overview | Omit | Problems |
Cooked
| not cooked | 24 | 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+K%3D%27Unterverwandlung%27+AND+K%3D%27Batterie+Typ+Siers%27