Ex.1       Bidding : 1♦ - 1♠ - 1NT - 2♣ - 2♥* - 4♥ - Pass
Opener ♠ 8 5 ♥ A Q 9 7 ♦ K 9 3 2 ♣ A 6 4		Responder ♠ A Q 7 6 3 ♥ K 10 5 4 ♦ 8 6 ♣ K 8
* Opener's 2♥ reply to Crowhurst shows 12-13 points and a 4-card heart suit (which he was unable to bid up the line). With 14½ points and 4 hearts himself Responder raises to 4♥.
Ex.2       Bidding : 1♦ - 1♠ - 1NT - 2♣ - 3♠* - 4♠ - Pass
Opener ♠ K 8 5 ♥ A 9 7 ♦ K 9 7 3 2 ♣ A 6		Responder ♠ A Q 7 6 3 ♥ K 10 5 4 ♦ 8 6 ♣ K 8
* Opener's 3♠ shows 15-16 points and 3-card support for Responder's spades.   Responder, with 5 spades, bids 4♠.
Ex.3       Bidding : 1♦ - 1♠ - 1NT - 2♣ - 2♠* - 2NT - Pass
Opener ♠ 9 8 5 ♥ A Q 9 ♦ K 9 7 3 ♣ A 6 5		Responder ♠ A J 10 6 ♥ K 5 ♦ 8 6 2 ♣ K 8 7 3
* Opener's 2♠ shows 12-13 points and 3-card spade support. Responder, with only 4 spades himself and a minimum hand bids 2NT. This is not an invitation bid, Opener must pass !
Ex.4       Bidding : 1♦ - 1♥ - 1NT - 2♣ - 2NT* - 3♣ - 3NT
Opener ♠ K Q 9 ♥ 7 6 ♦ A J 9 2 ♣ A 8 5 4		Responder ♠ 8 6 ♥ K Q J 5 ♦ K 4 3 ♣ K 10 9
* Opener's 2NT shows 14 points exactly.   Responder's 3♣ asks for stoppers. Opener has stoppers in three suits and bids 3NT
Ex.5       Bidding : 1♦ - 1♠ - 1NT - 2♣ - 2NT* - 3♣ - 3♠ - 4♠
Opener ♠ 7 6 4 ♥ K Q 9 ♦ A J 9 7 2 ♣ K 8		Responder ♠ K Q 9 5 3 ♥ 10 6 ♦ K 4 ♣ A 10 9
Opener has exactly 14 points (13 HCP + 1LP !) and therefore replies 2NT. Responder's 3♣ is a repeat Crowhurst enquiry after which Opener shows his 3-card ♠ support.
© 2016 Michael Furstner