[lycier]

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I am south in fact.
After opening 1♣, if I bid 1N, it would show 11-14hcp, so I have to make double at first.
After responding 2♣,
1) if I bid 2N, it would show " Invitational to 3NT game with 12+TPs and stop in ♣".
2) if I bid 3N directly, it would show " 18-20hcp and stop in ♣".
So I have to jump 3♥ to show " Twice rebiddable ♥, 15+TPs, forcing to 3N ", however Gib would rebid 3N instead of 3♠, no way to find 4-4 ♠ fit.


I don't know how to show this balancing 15-17hcp hand correctly, can you help me?

[Stephen Tu]

The cue bid should promise a rebid over 2M, so in theory you should be able to bid 2H without fear of it getting passed out. If the bot defines 2H as limited and nf, this is a bug that ought to be changed.

2nt maybe ought to deny a major (since big hands can just bid 2M forcing), ought to be GF opposite the cue bid.

Over 2H, bot can bid 2s, forcing (if it had just spades and wanted to invite only, should jump in spades not cue).

[lycier]

Stephen Tu, on 2017-July-09, 18:22, said:

The cue bid should promise a rebid over 2M, so in theory you should be able to bid 2H without fear of it getting passed out. If the bot defines 2H as limited and nf, this is a bug that ought to be changed.

2nt maybe ought to deny a major (since big hands can just bid 2M forcing), ought to be GF opposite the cue bid.

Over 2H, bot can bid 2s, forcing (if it had just spades and wanted to invite only, should jump in spades not cue).

Really?
Now see my basic robot playing.
Hand-1

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Hand-2

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However unfortunately hold only 12hcp :
Hand-3

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Hand-4

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[Stephen Tu]

Yes, really. You asked how the bidding ought to go. My post describes how std bidding among competent humans should proceed. I didn't claim the bots would handle it correctly.

Now we all know the bots have tons of bugs, and certainly responding to takeout dbls is a major area where it does a ton of things wrong. Cue bids when it should just jump in a suit. Bidding minors instead of unbid majors.

So just add this to the list. Cue bid a second time by North is clearly wrong, it should just bid 2s. Now whether North hand is worth this sequence vs just an inv jump to 2s bypassing the cue bid is another matter. Probably not. But if it does choose to cue it ought to go 2h 2s 3s/4s. Not cue a 2nd time.

[lycier]

Yes, I agree.

[nige1]

lycier, on 2017-July-09, 17:53, said:

I am south in fact.
After opening 1♣, if I bid 1N, it would show 11-14hcp, so I have to make double at first.
After responding 2♣,
1) if I bid 2N, it would show " Invitational to 3NT game with 12+TPs and stop in ♣".
2) if I bid 3N directly, it would show " 18-20hcp and stop in ♣".
So I have to jump 3♥ to show " Twice rebiddable ♥, 15+TPs, forcing to 3N ", however Gib would rebid 3N instead of 3♠, no way to find 4-4 ♠ fit.
I don't know how to show this balancing 15-17hcp hand correctly, can you help me?

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Crowhurst employed a wide-ranging balancing 1N (about 11-16) with transfer responses. A 2♣ reply was Staymanic but the 1N bidder could rebid 2N to show 14-16.

On the actual deal, a protective T/O double works well when partner passes for penalties.

[Vampyr]

nige1, on 2017-July-11, 15:17, said:

Crowhurst employed a wide-ranging balancing 1N (about 11-16) with transfer responses. A 2♣ reply was Staymanic but the 1N bidder could rebid 2N to show 14-16.

I like that still.

[jdonn]

The GIB balancing notrump ladder definitely has holes and needs to be fixed.