A 2♠.
If partner has something like ♠AQxx, ♥xxx, ♦KQxx, ♣xx and decided to pass, she will now make a game try.
B Pass
The choice is between 1♠ and pass. Double is out with only a ♥ doubleton. I go for pass, fancying that +100 is more likely than +90.
C 3♦
Since we are not playing Gazzilli I have to raise to 3♦. This is much better than 2♠ because it will encourage partner to bid on with 16.
D 3♣
The opps are likely to bid the contract in hearts and so 3♣ is a good lead director.
E 3♠
With this hand, passing is riskier than bidding.
F 3♦
This is really tough:
3♦? This bid is NOT necessarily asking for a ♦ stop it is saying “Please tell me more?” However, if partner bids 4♣, it pretty certainly means that partner does not have a ♦ stop and so we bid 4♠. This is ok if we think it will play better in 4♠ than 3NT. OK give partner ♠Q10xx, ♥xx, ♦10x, ♣AKQxx and 4♠ gives us a better score than 3N. Remember this is MP scoring.
G 5♦
This tells partner that I have some top diamonds with my ♥ support. So, if the opponents bid to 5♠ or 6♣, then she is in the best position to judge whether to make a forcing pass, bid on to 6♥ or double.
H Pass and lead 3♦
This looks very unusual. It is not possible for partner to be void in ♦ or ♠. With a void in ♦s this would give partner an impossible 5107 distribution. With a void in ♠ this would give partner a 0157 distribution. Possible I suppose. So it could be that partner has opened 3♣ with a 6 card suit and an outside ace? Would it be possible for partner to have opened with a 0157 distribution? It is unlikley that partner would gamble on the opps 2 clubs dividing 1-1.
So, the question is which Ace? If A♦ then it is possible that on a ♠ lead the losing ♦ can be discarded. If A♠ it is less likely that this can be discarded on winning ♦s. So lead the 3♦ and hope that ♣s do not split 3-0.