Problem A

Matchpoints
North-South vulnerable
You, South, hold:

^*BWS: 2 ♦, 4 ♣ game-force

What call do you make?

Problem B

Imps
Neither side vulnerable
You, South, hold:

What call do you make?

Problem C

Matchpoints
Neither side vulnerable
You, South, hold:

^*BWS: 2 ♠ forcing for one round

What call do you make?

Problem D

Matchpoints
Neither side vulnerable
You, South, hold:

^*BWS: artificial game-force; 1 ♠ would have shown four-plus spades, any strength.

What call do you make?

Problem E

Matchpoints
Neither side vulnerable
You, South, hold:

^*BWS: three spades

What call do you make?

Problem F

Imps
Both sides vulnerable
You, South, hold:

What call do you make?

Problem G

Imps
Neither side vulnerable
You, South, hold:

^*three spades

What call do you make?

Problem H

Imps
Both sides vulnerable
You, South, hold:

^*East has shown a game-force with fewer than four spades

What is your opening lead?