Where partner opens a major (say S), and overcaller doubles, responder bids 2S with a minimum hand, 3S preemptively, and a Jordan 2NT as a limit raise or better. XX in this position shows 10+ points, and tends to deny opener's suit.
S: Qxx H: Qxx D: KQxx C: Axx S: AKxxx H: x D: Axx C: KJxx W N E S 1S X 2N P 4S P/OResponder would bid 2S with Qxx/Qxx/Kxxx/xxx, 3S with Qxxx/xxx/Kxxxx/x, and XX with Qx/Qxxx/KQx/Axx.