These bids tell absolutely nothing about the . . . . . . . . . , but only indicate the . . . . . . . . . . . . held in Partner's hand.
When the 4NT bidder discovers his side holds . . . . . . . . . . . . . . . . . ., he me follow on with a bid of :

• - this shows that the side holds . . . . . . . . . . . and conveys the message :
  "Partner, . . . . . . . . . . . . . . . . . . . . ?"
  
  
• Partner replies :

The Blackwood convention is used in trump contracts where some of the 33 points required for a Small Slam may include 4 or more shortages points, and the Opponents may therefore hold 2 Aces. The Blackwood Convention guards against this.

The bid of 4NT is not Blackwood when it is a response to a . . . . opening bid. In such case it is an . . . . . . . . . . . bid for . . . . . . . .

Enemy Interference
When the enemy tries to spoil the party with an interference bid over Partner's Blackwood 4 NT responses follow the so called . . . . . . . . . . procedure.
For example after 4NT - (5D) - You ?

Double Pass (5 in next suit) 5H (5 in suit after that) 5S

= . . . . . . . . . = . . . . . . . . . = . . . . . . . . . = . . . . . . . . .

Roman Keycard Blackwood is a useful variation on the standard Blackwood conventions and includes asking for the . . . . . . and . . . . . . . of the . . . . . . . suit. if no . . . . . . suit has been agreed upon the last bid suit counts as the . . . . . . suit.

The key cards are the . . . . . . . . . plus the . . . . . . . . .
The responses to 4NT then are :

After a 5C or 5D response the . . . . . . . bid (excluding the trump suit) asks for the . . . . . . . . . The . . . . . . . . . response to that denies the . . . . . . . . . . . . The next higher bid promises the . . . . . . . . . . .

A subsequent bid of 5NT asks for the . . . . . . as in standard Blackwood, but the . . . . . . . is not shown again.

Against enemy interference use . . . . . . . . .
For example after 4NT - (5D) - You ?

Double Pass 5 in next suit 5 in suit after that

= . . . . . . . . . key cards   = . . . . . . . . . . key cards   = . . . . . . . . . . key cards . . . . . . . . . . . . . = . . . . . . . . . . key cards . . . . . . . . . . . . .

Blackwood and Roman keycard Blackwood are useful tools for investigating the possibility of a Slam contract for many hands. However for some unbalanced hands these conventions may not produce the required answers.
Take this hand for example :

1. When a . . . . . . . suit has been found
   
   
2. and . . . . . . has been reached or a . . . . . . . . . . . . . . . . . . situation exists
   
   
3. any bid of a new suit is a . . . . . . bid, showing . . . . . . . . . . . . . . . in that suit
   
   First round control is either . . . . . . . . . . or a . . . . . . .
   Second round control is a . . . . . . . . or a . . . . . . . . . .
   

The auction, using cue bids, goes like this :

A 5NT bid, not preceded by a Blackwood 4NT, is a . . . . . . . . . . . . bid, asking Partner how many of the . . . . . . . . Honours he holds in the . . . . . suit.
Replies are :

This is a most useful Convention when used in conjunction with cue bidding, where the . . . . . . controls are not being investigated.

Answer