Statto

johnu has posted so I don't have to. My numbers seem about right based on your numbers. I don't think you are interpreting the numbers correctly.

The probability of being dealt an opening hand of 20-21 HCP is 0.6%. So it would actually seem that in 13% of those cases opener has a 5-card major. Now you go figure B-)

Y, or passed.

Maybe I need to go to Specsavers, but I don't see much defence in the North hand. It also looks far too weak for a 2♥ overcall to me, but NV looks ok for 3♥.

2♥ rebid seems normal in Acol, as the ♥ aren't too shabby. You could rebid 2♣ with a view to finding a NT contract, which is far too tempting with this balanced hand, so that's what I'd do.

Different vulnerability would get different results, but at this vul the majority verdict is clear B-)

If playing SNT, I would have downgraded this and opened 1♣. Having opened 1NT it now looks like an easy pass at red. If playing WNT, having downgraded, I bid 3♠ now.

South should bid something other than 2♥ on the 2nd round. 2♥ is a weak sign-off with a 6-card suit; well, it is the way I play normally. South's hand is verging on better than that, and they know of a ♣ fit to boot.

Go for a name that is already renowned for bridge software. It is easy to convert good software to tablet format. It is less easy to write good software in the first place.

If you like opening 1NT, you might consider a weak NT, or perhaps 14-16 B-)

Presumably we did not bid 2♦ on the last round because we are not playing negative free bids?

I don't understand 3♦. We have a poor fit for partner's 1st suit, and quite likely not a good fit for their 2nd suit if that is ♥, along with 5 fairly useless ♣ in offence. Partner's reopening double doesn't necessarily promise any extra strength (YMMV), and we don't seem to have a decent 6-card suit to justify jumping vulnerable (again YMMV). Some comments seem to be assuming this is MPs, though the scoring doesn't seem to be given...

If LHO produces the King or Queen, unless I've missed something, I don't see what you could gain by not covering with the Ace. The decision will come on the next round, whether to play 9 or J. SuitPlay says the 9, though my instinct would be the J, expecting it to be much more normal to have played the honour from KQx than K10x/Q10x, but maybe that's not the case. It probably depends quite a bit on the hand in question. Your post illustrates restricted choice in a more complex setting B-)

(1♥)-P-(1NT)-X is normally played as take-out. But what about (1♥)-P-(1NT)-P;(P)-X? Marvin French thinks this should be penalty. Do you?

IDK, it depends on partner, opponents, the field, and the cards in the other hands. At the local club, I doubt it. But at a higher powered event, maybe.

This won't be a great dummy, looks a reasonable hand for defending, and I'm tempted to pass, but I'll show the support and make it harder for opener to make another bid. If partner has a super good overcall they may raise to game. Actually now I prefer 2NT which looks kinda obvious, but too late. IMPs or MPs?

This makes sense if we think a fair number of other tables will be playing in 5♦, or for that matter 4♠. But if we think the majority will have the same auction, then it mostly comes down to beating those, and I think we probably will defeat 5♠, so in that case double is best. One thing I'm not doing is bidding 6♦, as it's certain to be doubled and go 1 or 2 off, and if only 1 off then probably 5♠ was down anyway.

It clearly expects to score better than letting 1♣ be passed out. Depending on vulnerability this probably means expecting to make on average, or at white perhaps going no more than one down. It suggests raising to 4 with a reasonable hand and fit.

Googling for 'bridge negative double' should turn up some resources. cue-bid = a bid of opponent's suit, in this context GF = game forcing LR = limit raise (in case it wasn't clear :))

The excellent ♠ intermediates make North's hand a clear opener IMO. If playing Standard I would respond 2♥. Playing 2/1, 1NT is justified with a void in partner's suit, and maybe we'll get out at 3♥. But an immediate 2♥ reply with a good suit and hand is far too tempting...

Agree. The auction is fine up to and including West's 2♠ bid. North should now pass and allow partner to compete, and I don't know why West is bidding 3♠ :blink:

1. I like X too. 2. I'll duck the opening lead to give opps a chance to make a helpful trump switch. Either way, I then hope to play trumps for 1 loser by starting with small from dummy towards the 8, and aim to establish the ♥ by ruffing. Hopefully I have enough entries to dummy to do this. I think this works whenever ♦ are no worse than 3-1, ♥ no worse than 4-2, and ♦KQ or stiff ♦9 are not offside.

On the 1st hand, North seems to have a fair bit in reserve after partner's raise to 4♠, both in strength and shape. I would be tempted to make a slam try with a 5♦ cue.

Pass and lead a ♣ (assuming partner doesn't bid 6♥).

I lead a ♣, hoping to find partner's long suit, as they're the one with the side entry.