[thorvald]

I had this hand

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The explanation to 4♠ was: Cue bid -- 13+ total points; forcing to 5C


Note the "forcing to 5♣!!"

What to bid? 4N was defined as quantitative (Another hint)
5Mi was natural, NF

My opponent jumped to 6♥
I could see that 5♠ was showing 5+♥, 18-21 HCP , so that was my choice.

GIB now bid 6♣ explained as 4+♣, 13+ points

And I dropped trying to bid a grand and settled for 6♥.

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I am still not sure if 4♠ is both minors (but I think so) or just ♣

[johnu]

thorvald, on 2023-July-30, 10:32, said:

I am still not sure if 4♠ is both minors (but I think so) or just ♣

Surely both minors. With just clubs, then 4♣ seem obvious. After 4♣ you can't afford to show diamonds later since that would force a preference to 6♣. Then again this is GIB so who knows.

[smerriman]

4 of a minor shows 17+ total points. 4♠ really is just the fallback for any remaining 13+ total point hand (that can't bid 4♥, which seems to be wide ranging) without saying anything specific about minors (though hopefully simulations would tell it to avoid it for some of those cases).

[johnu]

smerriman, on 2023-July-30, 17:10, said:

4 of a minor shows 17+ total points. 4♠ really is just the fallback for any remaining 13+ total point hand (that can't bid 4♥, which seems to be wide ranging) without saying anything specific about minors (though hopefully simulations would tell it to avoid it for some of those cases).

Yikes!