Blackwood Convention

Check Number of Aces & Kings Held by Partnership

Sequences:

  • I:4NT (after various sequences) - asks for Aces
  • I:5NT (after response to 4NT) - asks for Kings

Use Blackwood after a bidding sequence which demonstrates a suitable trump suit and sufficient strength to make a slam. Use Blackwood to verify that there are sufficient Aces and Kings to insure that there are not 1 or 2 quick loosers which will defeat the target slam.

Responses: after 4NT

R:5C0 or 4 Aces
R:5D1 Ace
R:5H2 Aces
R:5S3 Aces

Responses: after 5NT

R:6C0 or 4 Kings
R:6D1 King
R:6H2 Kings
R:6S3 Kings