The Next Step: Key Card Blackwood

Quick Tips

  • Roman Key Card Blackwood is a big improvement on ordinary Blackwood (and easy to learn)

  • Use Blackwood only when a trump suit has clearly been agreed

  • The King of the agreed trump suit is upgraded and considered the same as an ace

  • There are five key cards to consider: the four aces and the trump king

  • The most popular Key card is “1430” (same as the score for a vulnerable major slam)

  • After the 4NT ask, 5♣️ shows 1 or 4 key cards (could be aces or the trump king)

  • After the 4NT ask, 5♦️ shows 3 or 0 key cards (could be aces or the trump king)

  • After the 4NT ask, 5♥️ shows 2 key cards (without the trump queen)

  • After the 4NT ask, 5♠️ shows 2 key cards (with the trump queen)

  • It’s ok to bid slam missing one control but not two (ie A, A or AK of a suit)

  • If your side has all the first round controls, you may ask for second round with Grand Slam in mind

  • 5NT asks for kings, and the most effective answers are specific kings (ie which king you hold)

Here’s a video from an earlier lesson if you would like to do more revision on Slam Bidding & Blackwood