|5||0 or 4 aces|
|5||1 or 3 aces|
|5||2 aces of the same color or rank|
|5||2 aces of dissimilar color and rank|
Specifically, the 5 response shows one of the following pairs of aces:
And the 5 response specifically shows either:
A 5NT rebid by the 4NT bidder is king-asking, the responses to which are normal Blackwood responses. 6 shows 0 or 4 kings, 6 shows 1, 6 shows 2 and 6 shows 3.
Roman Blackwood was created by the famous Italian Blue Team in the 1960s.
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