A support double, when used, is made when RHO overcalls partner's response, which may show only 4 cards. Here is an example: The double shows exactly 3 ♥s, then opener can decide whether to go on or do something else.
| Identifier (URI) | Rank |
|---|---|
| dbkwik:resource/HV_UAk9_IDK0YX5NjL8Wsw== | 5.88129e-14 |
| dbr:Support_double | 5.88129e-14 |
![[RDF Data]](/fct/images/sw-rdf-blue.png)
