+1 for control asks. The scheme I prefer is as follows: A=2, K=1 2♦ = 0-1 controls 2♥ = 2 controls 2♠ = AK 2N = KKK (Likely right siding any NT contract) 3♣ = 4+ controls, 3♦ relays for count if desired, then 3♥=4,3♠=5, etc 3♦-3♠ show a decent 6 card with no more than one control. Something like KQxxxx xx xx xxx type hand. After 2♣, we are 99% GF...the only passable auction is 2♣-2♦-2N, and then only with 0 controls.