Responder's bid on a 2♦ opening

Your P has 24HCP or more (or the number of tricks except one for Game)
This bid is Game forcing.
The bids to this opening are conventional and aim to show Opener your strength and number of aces. Opener will know immediately if Game or Slam can be bid.

1) No aces

2♥ : no aces and less than 8HCP
2NT :no aces and more than 8HCP (or 2 kings)

S	W	N	E

Problem E4530 2♥ showing a negative responding bid : weak (0-7HCP) no aces.

S	W	N	E

Problem E4532 2NT Responding to a 2♦ Game forcing bid, here 2 kings are easily worth 8 HCP. This is an exception.

2)The responding bids with 1 or 2 aces on a 2♦ opening :

2♠ : 1 ace in a major suit
3♣ : ace of ♣
3♦ : ace of ♦
3NT : 2 aces
4NT : 3 aces

S	W	N	E

Problem E4534 2♠ response bid : meaning 1 ace in a major suit. This bid doesn't describe the strength of Responder's hand... the follow on bid will ..