Choose the exact base edition you own and the candidate expansion. A compatible result requires an evidenced relationship with a source and date; a similar title or matching artwork is not sufficient.
Check a documented relationship between an exact base edition and expansion. A similar name does not establish compatibility.
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Before relying on a match
Read every condition in the result, including language, edition, player count, and other required products. If the source only establishes a relationship for one language or print family, a different version remains unverified until a suitable source confirms it.
Unknown means the available evidence does not settle the question. It is different from a documented incompatibility. A physical fit also does not establish rules compatibility, and a rules update does not necessarily replace components.
If your exact edition is absent, use the publisher’s compatibility guidance and the identifiers on your box. Send a correction or additional official source when you can establish a missing relationship.