Partial bidding sequences only shown depending on the bidding system used.

1. 1♥ - Open 1♥ 
2. 2♥  - CRO, the black suits.

or

Final Contract : 3 Hearts

1. 2♥ - 9 LTC, ok to open a Weak2 nonvulnerable against vulnerable, other vulnerabilities Pass.
2. 3♥ - 4 Hearts & 7 LTC hand, but do not jump to 4H as it is likely that partner will have a LTC of at least 8.

1.  2NT - CRO showing the majors. Vulnerable so must be up to strength. (Cue bid = Colour; 2NT = Rank – Majors over minor)
2. 3♦  - Forcing bid showing equal length in both majors & asking partner to choose. Passed in the first round, so must have 10-11 HCP

O/L ♣ A. Ruff, but do not draw trumps immediately. Play Ace and another spade to North, who must return other than a club. Win, and give up another spade. Contract now safe – 1 spade + 2 long spades, 4 trumps, 3 diamonds = 10 tricks. South will make a trump whenever.

or

Both of North’s responses are equally valid.

1. 3♦ - Weak Jump Overcall
2. Dble - Shows 4 Spades
3. 4♦ - The more you pre-empt the harder it is for your opponents

3♥ - Worth a jump with 6 Hearts, 6 LTC & the King in partner’s suit

1.  West's opening Pass - 10HCP 7 meets the Rule of 19, but if opponents win the auction you don’t want your partner to lead a Heart.
2. 2NT - Better bid than a double as you don’t have 4 Spades.
3. 3♣  - System is on after a NT overcall, i.e. Always use Stayman
4. 3♦  - Denies a 4-card major

1. Double - 5 Spades so could have over called 1S, but the double also shows a Diamond suit.
2. Redouble - Shows a strong hand with stop(s) in the unbid suits & some support for partner.

1. 3♦ - 7-3-2-1 is the ideal shape, butyou would only make this bid non-vulnerable against vulnerable.
2. ? It’s a guess, any bid may well be right or wrong. Shows, once again, how difficult Pre-empts make it for the Opposition. Best bid is possibly 3♥.

1. 2♠ - Jump shift. Partner has responded at the 1-level showing 6 points so you must have at least 19 to make this bid, and it is forcing to game.

Contract should have chances on a non- club lead.

1. 2♥  - WJO
2. Dble - Take out double, could be as little as 7 or so points, but will normally have 4 card spade suit,especially if weak. West must jump to game.