[cloa513]

Im a recent Solitaire tournament GIB North open 3 hearts and raise as South to 4 hearts with lots of strength but no hearts and then goes to around to East GIB who has 5 spades and not a bad hand and he doubles. I redouble and we make it easily because North's hearts are so good. Why the darn didn't East GIB double or bid 5 spades the first time? Is it simulation craziness.

[smerriman]

Need to see the actual hand.

[cloa513]

smerriman, on 2023-August-13, 13:39, said:

Need to see the actual hand.

iT WON'T LET ME CHOOSE THE CALL FOR east

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bbo BRIDGE dIAGRAM IS BROKEN- eAST PASSES, South bids 4 hearts, West pass, Noorth passes, East double, South Redoubles and passed out.

[pilowsky]

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[smerriman]

Are you sure this was GIB? Both basic and advanced robots bid 3NT over 3♥ every day of the week; the older version of GIB has 3♠ as its second choice with pass not even coming close. And if you force it to pass, they all bid 4♠ over 4♥..

What is a 'Solitaire tournament' though - do you mean an instant tournament? If so, it would be nice to see the original hand diagram and results of the tournament, to see the bid descriptions and what happened at other tables too..

[cloa513]

smerriman, on 2023-August-14, 01:23, said:

Are you sure this was GIB? Both basic and advanced robots bid 3NT over 3♥ every day of the week; the older version of GIB has 3♠ as its second choice with pass not even coming close. And if you force it to pass, they all bid 4♠ over 4♥..

What is a 'Solitaire tournament' though - do you mean an instant tournament? If so, it would be nice to see the original hand diagram and results of the tournament, to see the bid descriptions and what happened at other tables too..

pn|cloa513,~~M9961bp4,~~M10843rm,~~M11971mt|st||md|3S467AHD37JQKC28JA,S39QH69QD268TC346,SJH2458TJKD4C579K,|rh||ah|Board 1|sv|o|mb|3H|an|Preempt -- 7+ !H; 5-9 HCP; !HQ; 6+ total points |mb|p|mb|4H|an|1+ !H|mb|p|mb|p|mb|d|an|Takeout double -- 3-5 !C; 3-5 !D; 2- !H; 3-4 !S; 15-20 total points |mb|r|an|1+ !H; 19+ total points|mb|p|mb|p|mb|p|pg||pc|CQ|pc|C2|pc|C3|pc|CK|pg||pc|HJ|pc|HA|pc|S4|pc|H6|pg||pc|S8|pc|SA|pc|S3|pc|SJ|pg||pc|S6|pc|S9|pc|H2|pc|S5|pg||pc|HT|pc|H3|pc|D3|pc|HQ|pg||pc|D2|pc|D4|pc|DA|pc|D7|pg||pc|D9|pc|DK|pc|DT|pc|C5|pg||pc|S7|pc|SQ|pc|H4|pc|SK|pg||pc|HK|pc|H7|pc|C8|pc|H9|pg||mc|10|

https://ibb.co/pz8P5g1

[smerriman]

Ah, that's a very different hand from the one you showed originally.

The book bid over 3♥ is to pass, because it doesn't have the shape for a double, or good enough spades for its scientific definition of an overcall.

This is precisely why simulations are a *good* thing; it relaxes some constraints to see whether other bids are close, like double and 3♠, and test whether they might work out better on this hand, without having to change the definition of the bid itself (which would make it choose them in much worse situations).

Unfortunately, on its numeric suit quality scale, its spades are *two* levels below what it needs for an overall - and it only allows alternatives that are one level away. So it doesn't even *consider* 3♠ - if it did, the simulation would tell it that's the right choice 90% of the time.

It does consider double, but that works out far worse than pass, understandably, given you may not even be defending a game contract.

The suit quality required for a later overcall is slightly weaker, which is why it considers all of 4♠, x, and pass - most of the time, it decides 4♠ is almost always the right bid, but on rarer occasions it doubles (and even rarer, the book bid of pass), and this was one of those rarer occasions where the numbers just went that way. It doesn't have any way of connecting the two decisions together; they're both independent.