Problem A

Matchpoints
Both sides vulnerable
You, South, hold:

^*BWS: invitational-plus raise
†BWS: 3 ♦ = splinter

What call do you make?

Problem B

Imps
Both sides vulnerable
You, South, hold:

What call do you make?

Problem C

Matchpoints
East-West vulnerable
You, South, hold:

^*BWS: 1 NT = 10-14 HCP

What call do you make?

Problem D

Imps
Neither side vulnerable
You, South, hold:

What is your plan?

(a) 2 ♠ [BWS: five-plus spades, four-plus hearts, invitational]
(b) 1 ♠; then, after (pass) - 2 ♣ - (pass) - ?
(b1) 2 ♥ [BWS: game-force]
(b2) 2 ♠ (b3) 2 NT (b4) 3 ♠

Problem E

Matchpoints
North-South vulnerable
You, South, hold:

^*BWS: three hearts

What call do you make?

Problem F

Imps
Neither side vulnerable
You, South, hold:

^*BWS: game-force
^†BWS: 3 ♠ splinter; 4 ♠ exclusion-key-card ask

What call do you make?

Problem G

Matchpoints
Neither side vulnerable
You, South, hold:

What call do you make?

Problem H

Imps
Neither side vulnerable
You, South, hold:

^*lebensohl

What is your opening lead?