For example, when a bid is interpreted as '5- 8421 HCP in S', this means the bidder is expected to have 5 or fewer points in spades, counting an ace as 8 points, etc.
8421 Counting points by way of 8421 means counting an ace for 8 points, a king for 4, a queen for 2, and a jack for 1 point. If 2 ♣ is a strong, artificial force, 2 ♥ is natural. 2-under preempts A 2 or 3-level conventional opening bid made two steps below the opener's suit: for example, 2 ♦ to show a weak two bid in spades or 3 ♣ to show a three-level preempt in hearts. It represents '1 or 4' and '3 or 0', meaning that the lowest step response (5 ♣) to the 4NT key card asking bid shows responder has one or four keycards and the next step (5 ♦) shows three or zero. 1430 or 1430 RKCB A mnemonic for a variant response structure to the Roman Key Card Blackwood convention. It represents '3 or 0' and '1 or 4', meaning that the lowest step response (5 ♣) to the 4NT key card asking bid shows responder has three or zero keycards and the next step (5 ♦) shows one or four. 0–9 3014 or 3014 RKCB A mnemonic for the original (Roman) response structure to the Roman Key Card Blackwood convention.
