System (gasp) Notes

I've been learning a strong club recently, and we've sort of figured out a way to deal with intervention over our 1C openings. There's so little literature on this out there.

Our 1C is 16+, 17+ if balanced.

After 1C - (x) - ?
Redouble shows a semipositive (5-7) with three clubs. 1D is a semipositive without 3 clubs. All other bids are the same as if they hadn't come in.

After 1C - (1x) - ?
Double is any semipositive, all other bids natural. A cuebid shows a balanced GF with no stopper.

After 1C - (2x) - ?
Rubensohl applies. Responder assumes 1C opener has the 17-19 balanced. Cheapest new suit bids up to 2N are natural GF, otherwise 2N is a transfer to clubs, 3C transfer to 3D, etc. A transfer to their suit is a GF takeout. Cuebid shows a balanced GF with no stopper.

After 1C - (3x) - ?
Double is basically 6+ game forcing. This is a nightmare, but it's pretty much a nightmare in any system when the opps preempt to 3.

Some meta rules:
When responder shows a semipositive, we are in a force to 2NT. If the opps get to game after responder has shown a semipositive, we are in a force.

If we are in a force and neither player has shown any shape (1C - 2S - x - 4S), our first double is takeout. We invert standard forcing pass agreements.

If responder has shown some shape and we are in a force (1C - 2S - 3S - 4S, 1C - 2S - 3H - 4S), standard forcing pass agreements apply. Double is defensive, pass is offensive.

It's only happened twice, but so far we've gotten rich just by doubling when the opponents go crazy over our 1C opening and violate the law. We had one auction where I opened 1C with 5-5 majors, and it went 1C - 3C - x - 5C. I shrugged and doubled for takeout, which of course partner left in. It went down 3 against air. I especially love responder's cuebid (balanced GF, no stopper), since every time it's happened, they bid to the 4 level, I'm looking at 2 small, and I shrug and double.

Right now, the 1D (2+) opening is actually giving us the most headache.