[Cyberyeti]

You are playing 4 card major Acol, vul at teams when partner opens 1♠ (4333 15-19 or 5+ cards)

Your hand is:

---

Your options are:

1: 2♣ 10+ 4+♣, not GF
2: 3♣ GF 5+ good ♣, at least Qxxx ♠ or the old fashioned one suited club rock crusher

In either case, partner will bid the minimum number of diamonds next guaranteeing at least 5 spades and 4 diamonds in each case.

If you bid 2♣, the next hand doubles 2♦ your options basically are:

2♥ 4th suit not FG but in this situation almost is as pass will remove most of the hands you don't want to force on
Redouble big hand not necessarily any great diamond holding, penalty orientated initially
Blackwood

If you bid 3♣, your options are:

3N to show the single suited type, but not a suit you want to play a slam in opposite a small singleton, this hand is fairly minimum for this hand type
3♠ to show it as the fit type
3♥ cue and fit type

Continuations to follow

ALso interested how other people bid this in other systems that are not 2/1 GF

[Tramticket]

I would bid 2♣. I don't jump-shift to 3♣ when I don't know what strain I want to be in. In one partnership we play weak jump-shifts.

The double is very strange. If you judge your opponent to be competent(?), then I guess they have spades (to explain the first-round pass) and hearts. We might be picking up a nice penalty but the vulnerability is not right to defend. Without the double, I would bid 3♠ which must be forcing and confirms the fit. But since our opp has warned us that spades are splitting badly, maybe 4th suit foring is right for now.

[Cyberyeti]

Tramticket, on 2019-September-30, 08:13, said:

I would bid 2♣. I don't jump-shift to 3♣ when I don't know what strain I want to be in. In one partnership we play weak jump-shifts.

The double is very strange. If you judge your opponent to be competent(?), then I guess they have spades (to explain the first-round pass) and hearts. We might be picking up a nice penalty but the vulnerability is not right to defend. Without the double, I would bid 3♠ which must be forcing and confirms the fit. But since our opp has warned us that spades are splitting badly, maybe 4th suit foring is right for now.

X was explained as diamonds (presumably for a diamond lead if N bid NT next) and opps were known as pretty random.

[Tramticket]

Cyberyeti, on 2019-September-30, 08:22, said:

X was explained as diamonds (presumably for a diamond lead if N bid NT next) and opps were known as pretty random.

West hold diamonds - but not good enough to overcall??? Tempted to re-double, but I think that the practical answer is to bid 3♠. I will settle for 4♠ unless partner can cue-bid diamonds. [I'm assuming Italian-style cue bids?]

[Cyberyeti]

Tramticket, on 2019-September-30, 08:33, said:

West hold diamonds - but not good enough to overcall??? Tempted to re-double, but I think that the practical answer is to bid 3♠. I will settle for 4♠ unless partner can cue-bid diamonds. [I'm assuming Italian-style cue bids?]

What are you going to do if he bids a natural and presumably 5341 3N ?

[Tramticket]

Cyberyeti, on 2019-September-30, 08:39, said:

What are you going to do if he bids a natural and presumably 5341 3N ?

4♣ - I have to give partner a chance to cue-bid diamonds.

If 4♠ is failing despite our 8-card fit and combined strength I take it on the chin.

[Cyberyeti]

Tramticket, on 2019-September-30, 08:45, said:

4♣ - I have to give partner a chance to cue-bid diamonds.

If 4♠ is failing despite our 8-card fit and combined strength I take it on the chin.

He bids 4♦

[Tramticket]

Cyberyeti, on 2019-September-30, 08:51, said:

He bids 4♦

4♥ (cue or Last Train?)

[pescetom]

Cyberyeti, on 2019-September-30, 07:33, said:

ALso interested how other people bid this in other systems that are not 2/1 GF

Playing Italian 4-card majors where 2C would not be a game force (and 1S could also be be 4-card 12-14), 3C is a game force showing a hand much like this - semi-solid 6-card clubs without 4-card spades. Opener's rebids are natural and benefit from the GF, so 4C would invite control-bids in clubs without denying 5-card spades.

[Cyberyeti]

The reason I posted this was that partner felt rather snookered on our auction of 1♠-2♣-2♦-(X)-2♥-3N now 4N would be quantitative and he could see nothing to do other than bid 6♠, I bid 6N worried about either partner not having ♠J and a 4-1 break (my spades were A6xxx) or a diamond ruff (KQxx). 6N was fine (♥KJ9, ♣Q completed my hand.