Actual auction was - 1♣ (Precision) - 2♠ - p (<6 HCP) - p X (takeout) - p - 3♥ - p 3♠ (Nominally asking for a stopper) - p - 4♣ (Natural, denying a stop) 6♥ (Hey, I've got play if p has as little as xxxx xxxx xx Kxx, and partner knows I have hearts here, so 4♣ should show a non-bust hand)