At matchpoints, with no one vulnerable, there were two passes before North opened one club. Partner (East) doubled. South bid one heart, and I (West) passed, since I was "off the hook.
North rebid two clubs. Partner doubled that. I thought, "she must be really short in clubs, and probably in hearts. Therefore loaded in the "pointed" suits. I bid two diamonds with Q986 of the suit, with no other high card points in a 3-3-4-3 distribution. Partner bid two spades, we went down one, and got an average score.
Partner said, the second double was for penalty and that her first double showed strength in the majors. I have trouble seeing that.
I've seen a sequence of one club, pass, one heart, pass,, two clubs, double for penalty. The doubler passed and did NOT declare club shortness on the first bid.
But here, partner declared shortness by doubling the one club bid, and then based her double of the two club bid on "strength." Is there a plausible holding that can support both calls, say AK of clubs? (She actually had AT72 of clubs).