| Relationship | Method(s) |
|---|---|
| Leadend/halflead variant | Reverse Paradox Doubles |
| Reverse | Phoenix Doubles |
| EP1-3 | [Unnamed] Triples, Caters, Cinques, Sextuples, Septuples, Octuples, Nonuples, Decuples, Twenty-Three |
| EP4-1/0:0:1 | [Unnamed] Triples, Caters, Cinques, Sextuples, Septuples, Octuples, Nonuples, Decuples, Twenty-Three |
| EP4-1/0:0:2 | [Unnamed] Triples, Caters, Cinques, Sextuples, Septuples, Octuples, Nonuples, Decuples, Twenty-Three |
| EP4-1/0:0:3 | [Unnamed] Triples, Caters, Cinques, Sextuples, Septuples, Octuples, Nonuples, Decuples, Twenty-Three |