In the 'Board and Card Games' exchange, I have noticed that there are numerous chess questions. Mostly, they're about variants, or a mate-in-n[longest I've seen is 2]. Should these be migrated over to this site, or should they be left there?
In addition to what @HerbWolfe says, questions older than 60 days cannot be migrated, as this footnote to the FAQ on migration says:
1 After 60 days, migrations can only be performed by Stack Exchange employees. These are performed only in very, very rare procedural cases and are usually not done on request.