Overview
Genre
| s# | 1 | Overview | Omit | Problems |
Authors
| Keller, Michael | 1 | Overview | Omit | Problems |
Sources
| British Chess Magazine | 1 | Overview | Omit | Problems |
| Michael Keller. Ein Meister der Schachkomposition [Chlubna] | 1 | Overview | Omit | Problems |
Keywords
| Reziproker Fortsetzungswechsel | 1 | Overview | Omit | Problems |
Computer tested
| C+ | 1 | Overview | Omit | Problems |
Cooked
| not cooked | 1 | Overview | Omit | Problems |
https://pdb.dieschwalbe.de/overview.jsp?expression=COMMENTDATE%3E%3D20200919+AND+NOT+K%3D%27Hilfsr%C3%BCckz%C3%BCger%27+AND+A%3D%27Keller%2C+Michael%27+AND+NOT+K%3D%27Nowotny%27+AND+CPLUS++AND+K%3D%27Reziproker+Fortsetzungswechsel%27