2D: Game forcing and asking for Aces

Responses

• 2H: No Aces, fewer than 2 Kings and fewer than 8 HCP. In his next turn to bid responder can bid the most economical suit (never NT) as a double negative.
• 2S: 1 Ace, No Kings, 4-7 HCP
• 2NT: No Aces, but at least 2 Kings or 8+ HCP
• 3C/D: 1 black/red Ace with at least another King or 2 Queens
• 3H/S: KQxxxx in a black/red suit
• 3NT: 2 Aces
• 4C/D/H/S: AKQJxxx

When opener re-bids 2NT the developments are as after 2NT opening.

After a response of 2NT or higher, the principle of fast arrival applies. For example 2D-2NT-3H-3NT-4H is stronger than 2D-2NT-4H.

When opener re-bids 3NT it is round forcing (if the response was 2NT or higher) initiating a Baron-type bidding continuation. He can instead jump to 4NT to sign-off indicating that there are 2 missing Aces…

Responses after opponent's DBL

• Pass: Weak (Double negative)
• RDBL: Business (let's play 2D)
• Others: Unchanged

Responses after opponent's overcall

• Pass: Weak
• DBL: The overcall cut out my "normal" bid
• Others: Unchanged