Roman Blackwood
A
variation in responding to
Blackwood
that will sometimes determine which ace is missing (when the partnership holds three aces.) The responses are:
5
shows 0 or 3 aces;
5
shows 1 or 4 aces;
5
shows 2 aces of the same color or adjacent in rank;
5
shows two other aces than for 5
.
See
Roman Key-Card Blackwood
for a more popular variant.