[USViking]

It looks like half the field got soaked on this one: deal #6 of Tournament #4947 Robot Duplicate Matchpoints 14:36 11/3/11.

http://tinyurl.com/3g4m468

(I have tried to figure out on my own how to post hand diagrams here and I am afraid I won't be able to do it without tutoring;
hopefully it is an easy ~3-click copy+paste routine that I have somehow missed)

pass 1♣(me) 1♦ X(Robot; negative)
2♦ 3♣ pass 3NT
all pass

Robot had ♦Jx and ♣Jxx; down 3.

Robot's 3NT bid explanation included "likely" ♦ stop, but with both opponents bidding the suit,
and partner showing no interest in NT shouldn't 3NT here guarentee a ♦ stop? And with Jxx in suit rebid
by partner wouldn't 4♣ be the best bid with no actual ♦ stop?

[USViking]

I linked wrong deal. Let me try again;

http://tinyurl.com/3g4m468

PS I was able to edit OP. I believe deal link is now correct.

[USViking]

{comments}

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Computers should be easier. They really should.

[Bbradley62]

Tutorial: http://www.bridgebas...oad-a-lin-file/

[cloa513]

First link was fine- all you need.
GIB probably thinks there's only 40 pts Total points in a Hand by really its a big range from 40-136 so in given hand it assumes you must have a diamond cover with your 16 TP. How on Earth does GIB do simulations using Total Points as guide?

[barmar]

cloa513 is basically right. GIB thinks you have enough for game, and is taking a shot at 3NT. The comments in the rule file even say so:

; if you can't find anything better to do, take a chance on 3N with values,
; even without stoppers. Of course partner (and opponents) will assume you
; have them

I suspect the reason it's falling into this is that it's not taking the 3♣ bid as showing long clubs, notice 4+C in the description. It doesn't seem to be recognizing it as a free rebid of the same suit. Otherwise, it would have something "better to do": show its club support (if East passes and South jumps to 3♣, North cue bids 3♦).

We'll investigate this further.