Slam bidding

Question 1

Gerber vs. Blackwood, which one?

Answer 1

Blackwood when trump suit is agreed or implied.
Gerber after a natural 1NT or 2NT
After Stayman / Jacoby transfer
- 4♣️ is Gerber
- 4 NT is invitational (31+ points combined)

Question 2

Blackwood responses (4NT)

Answer 2

5♣️ = 0 aces
5♦️ = 1 ace
5♥️ = 2 aces
5♠️ = 3 aces
5NT = 4 aces

Question 3

Gerber responses (4♣️)

Answer 3

4♦️ = 0 or 4 aces
4♥️ = 1 ace
4♠️ = 2 aces
4NT = 3 aces

Question 4

Roman Key Card responses (4NT)

Answer 4

5♣️ = 0 or 3 key cards
5♦️ = 1 or 4 key cards
5♥️ = 2 key cards, and no trump queen
5♠️ = 2 key cards, and trump queen
Key cards are the 4 aces and king of trumps.