Problem A

Matchpoints
East-West vulnerable
You, South, hold:

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

What call do you make?

Problem B

Imps
North-South vulnerable
You, South, hold:

What call do you make?

Problem C

Matchpoints
East-West vulnerable
You, South, hold:

What call do you make?

Problem D

Matchpoints
Both sides vulnerable
You, South, hold:

^*BWS: 2 ♦ = Bart: five hearts or, on a natural continuation, stronger than a direct bid

What call do you make?

Problem E

Matchpoints
Both sides vulnerable
You, South, hold:

^*BWS: denies three-plus diamonds

What call do you make?

Problem F

Imps
Both sides vulnerable
You, South, hold:

^*BWS: simple new-suit bid nonforcing

What call do you make?

Problem G

Imps
Neither side vulnerable
You, South, hold:

What call do you make?

Problem H

Imps
Both sides vulnerable
You, South, hold:

^*denies singleton diamond

What is your opening lead?