Roman Keycard Blackwood (4 Clubs)

Rev: December 27, 1997

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When opener opens with a weak two-bid or a preemptive 3-bid. Responder’s 4C (or 4D) is a keycard asking bid. Responder has slam interest in opener’s suit. Purpose is to inquire about opener’s key cards without the risk of passing the five-level with only 11 tricks.

1. If partner opens with a weak-two bid, you must first bid 2NT. After partner’s rebid, you make a rebid of 4C.

2. If partner opens with a three-bid, you respond with 4C (if partner’s suit is clubs then you bid 4D).

Responses (up the line starting with 4D or 4H):