bdegrande

That is a truly horrendous red overcall over a 2♣ bid, It could easily be going for 1400 or more vs. a white slam.

Pass. Playing 5 card majors I would bid 3♥.

I disagree slightly with the scoring of the bids. If this is a hand good enough to bid Gazzilli on (and I don't have a problem with that), then 2♠ can not be a better rebid than 3♠. Any hand strong enough to bid Gazzilli is too good for 2♠;.

Both sides underbid. Opener easily has a 3♠ rebid, Aces and kings are undervalued by point count, having them combined in the same suit has some value and having AKXXXX in the likely trump suit is a big plus, it could play for no losers even opposite as little as QX or XXX. Responder's cards again include 2 aces and the queen of partner's suit, all of which look to be working, so a raise to 3♠ is again better. There are all sorts of 2♠ rebids by opener which would have a play for game opposite this hand. There are plenty of 11-12 point hands which would automatically take another bid which won't play nearly as well as this one and you have a known fit in a major.

I don't think there is any reason to make a responsive double holding four cards in the only unbid major. If the double is some sort of cooperative double, it becomes a little less clear.

I have no problem with West's double. He has shape which will play well on offense, and two aces are more than enough defensive values for his bid if partner chooses to defend, East's double is awful. KX of ♥ in front of the heart bidder figures to be worthless, and his hand has maybe one trick on defense. No reason to think 4♥ is going down. Both 4♠ and pass are better bids.

I play your hand as an absolute slam force opposite a 2♣ opener and my only question would be whether we should be bidding a grand. 2♣ completely misdescribes that hand. I would open 1♦, likely rebidding 5♦, but opening 5♦ is also much better than 2♣

It's a 3 loser hand. It is closer to a 2♣ opener than a 4♠ opener. I don't like to open 2♣ on extreme shape hands with limited defensive values, so I open i♠.

Points don't matter, there are only a few key cards that are meaningful. Game could be cold opposite lots of hands partner wouldn't dream of bidding on ♠KJXX and a singleton club could be enough. On many other hands 4♠ or 5♣ could be a good save against a making game.

Pass, you have good defensive values and partner is forcing you to bid at the five level, you should beat 4♠ pretty comfortably. Take the plus score at IMPs. There is no way to know whether five of anything is making. Your spade shortness makes it very unlikely that partner has a big distributional hand. On the actual hand, partner's double is awful, that hand should bid 4NT. And, for whatever it's worth, the slam is not such a good one, requiring the opening preempt to have the diamond K.

Yes, not close, I accept even white.

In my regular partnership we have a simple rule. If there is any question whether 4NT is Blackwood, it isn't, so we play 4NT as a quantitative invite in a lot of auctions.

Most of the blame to N. If you open the hand 1♦, which is fine depending on your bidding style, then you must pass at your second turn to show a minimum. South's double is unfortunate as it tells declarer how to play the trump suit, but with two aces and thr trump king and partner opening the bidding, it feels like letting declarer steal not to double.

4 ♠ any vulnerability or form of scoring. Partner will have no way of knowing that his minor suit queens are magic cards and that his weak trumps aren't a problem.

I would upgrade playing a 20-21 point range. Aces and kings are very undervalued by point count, and you don't know that you will wind up playing in no trump, but upgrading higher than a 22 point NT is too big a stretch.