[shevek]

I recall the ideal arrowswtich arrangements are something like once for up to 8 tables, twice for 9-12. Whatever.
Next week I'm running a social 12-table competition between 2 clubs. They expect to play pairs from the other club so Club A will take NS & Club B EW. I think they'll play 11 x 2.
Does it make sense to have more arrowswitched rounds?

[helene_t]

Depends. If your objective is to compare performance of pairs regardless of which club the belong to then you should stick to the normal guidelines.

If your objective is to make internal comparison for each of the two clubs separately then you should not arrow switch.

If your objective is to compare the two clubs then you could make two mitchells of equal size, one with club A players NS and the other with club A players EW, and then for each board convert the difference between the average total points in the two mitchells to IMPs. You can do this twice with the club A players from mitchell 1 swapping with the club A players from mitchell 2 after the coffee break so everyone gets to play everyone from the other club.

If you chose the latter solution then there is no arrow switch.

[Hanoi5]

I'd recommend using a Howell movement instead of an arrow switch.

[blackshoe]

Coffee break? What's a coffee break?