|2♥-2♠||A forcing enquiry to find our more about Opener's strength and distribution:|
|-2NT||shows minimum range, any distribution. 4♣ is Beta, but rarely used.|
|-3♣||shows a Diamond shortage, max range. 3♦ is Beta
|-3♦||shows a Spade shortage, max range. 3♠ is Beta|
|-3♥||shows a Club shortage, max range. 4♣ is Beta|
|-3♠||shows a 4+-card Spade suit, max range. 4♣ is Beta|
|-3NT||shows a max range 6322-shape hand with scattered values.
|-4♣||shows a 4+-card Club suit, max range. 4♦ is Beta
|-4♦||shows a 4+-card Diamond suit, max range. 4♠ is Beta|
|Once a shortage has been shown the short suit can be used for a Beta Ask, but no Epsilons are permitted. If Opener shows a second suit then a relay in the next suit up (not including 3NT or 4♥) is Beta. Epsilons are still not permitted.
|2♥||-2NT||is Lebensohl forcing a 3♣ bid from Opener, after which any bid is natural and strictly a sign-off unless obviously invitational
eg: 2♥-2NT-3♣-2♥ is mildly invitational in Hearts, probably wanting good Hearts as well as upper range (a hand worth a strong invitation would go via 2♠)
|2♥||-3♣||Is Gamma in Hearts. Asking Bids are established.
|2♥||-3♥||is purely pre-emptive and not invitational.
|2♥||-4♥||is purely pre-emptive but may well conceal strong vales.|