Against Strong 1C

(1C) - X strong hand
(1C) - 1D/1H/1S nature
(1C) - 1NT , single suit, 6+
(1C) - 2C, C+ higher suit
(1C) - 2D, D+ higher suit
(1C) - 2H, H+ S suit
(1C) - 2S, S suit
(1C) - 2NT, 5-5 minors


Only valid in direct seat after 1C opener