Byzantine

A form of Key Card Blackwood in which there are 1 or 2 key suits.  A key suit is any suit bid and supported, or any suit bid by the partner of a NT opener.  A 1/2 key suit is one which is bid and not supported, and we can have 1 half key suit only when we have 1 key suit (not when we have 2).  Queens will be counted as key when they have the king as well.  So, the responses are:

5      - 0 or 3 key cards

5      - 1 or 4 key cards

5      - 2 or 3 key cards

5      - 4 key cards

5NT   - 5 key cards

Compiled by Lorne Russell 2005