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Event 15 information and score reporting #nofeed

#81 User is offline   mlbridge 

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Posted 2018-December-21, 12:07

View Postbarmar, on 2018-December-21, 10:45, said:

Better to use Robot Report or post them in the GIB forum. I doubt that Georgi is looking here for reports.

OTOH, maybe you should bid your hearts instead of splintering in clubs, they're a source of tricks. You also could have opened 1, planning to reverse in spades twice to show the 6-5 shape.

I've found that GIB is not great at evaluating its hand after splinters, it frequently signs off when there are slam prospects. I'm not sure if we have lots of bidding rules for this, it might rely more on simulations.

Slam bidding is complicated, it's hard to write explicit rules for them, it usually takes judgement.


Do you by any chance have any info as to how the GIB signals on defense?
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#82 User is offline   cyrenman 

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Posted 2018-December-21, 13:01

Group B

cyrenman 57 - 31 Natali_

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#83 User is offline   hrothgar 

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Posted 2018-December-21, 14:17

View Postbarmar, on 2018-December-21, 10:45, said:


OTOH, maybe you should bid your hearts instead of splintering in clubs, they're a source of tricks.



Single biggest thing that I care about is a Diamond control, followed by the Queen of Spades, so opening spades, seemed like the way to go.
Also, GIB likes to lead shortage, so suppressing the Hearts and getting a Heart lead into my hand tends to pay off.

Quote

You also could have opened 1, planning to reverse in spades twice to show the 6-5 shape.


In my experience, GIB handles 6-5s with reverse strength miserably.
Alderaan delenda est
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#84 User is offline   billyjef 

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Posted 2018-December-21, 16:34

billyjef 25 : 10 sfi
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Jef Pratt
Surrendering to existential truth is the beginning of enlightenment.
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#85 User is offline   mlbridge 

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Posted 2018-December-21, 18:29

Mlbridge / Toast1 39-30
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#86 User is offline   mlbridge 

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Posted 2018-December-21, 18:31

Mlbridge / Tim_ucin 45-40

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#87 User is offline   mlbridge 

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Posted 2018-December-21, 18:34

Mlbridge / Twisterrz 41-38

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#88 User is offline   mlbridge 

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Posted 2018-December-21, 18:35

Mlbridge / Smerriman 25-25

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#89 User is offline   smerriman 

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Posted 2018-December-21, 19:33

View Postheart76, on 2018-December-19, 04:24, said:

I do not normally ask this, and no hard feelings irrespective of what you will say, but can the TD take a look at GIB defence on board 14?
The difference between the 2 hands is the first card played from dummy from a doubleton, resulting in a 10 IMP swing which is IMHO totally unfair :)
Ok, GIB has its limits, but depriving the long spades from a side ace is above and beyond.


I dealt 500 hands which matched these rules:

- North has K93 in spades
- North has either 4 hearts, or 5 hearts and less than 11 total points (didn't bid 2 directly)
- North has less than 4 diamonds (wouldn't bid 3NT)
- North has between 11 and 18 HCP (going by definition)

Note North will bid 3NT even with four low hearts, so you can't assume any honors there.

The results:

In 63 cases, partner had the club ace. Leading the spade beats 3NT, while leading the heart Ace allows it to make. Heart Ace costs 10 IMPs.
In 112 cases, we can cash the setting tricks in hearts, gaining either 11 (53 cases) or 12 (59 cases) IMPs.
In 266 cases, cashing the heart saves an overtrick, gaining 1 IMP.
In 50 cases, we can save two overtricks by cashing the heart, gaining 2 IMPs.
In 9 cases, cashing the heart Ace costs an overtrick, losing 1 IMP.

Overall, playing the heart Ace is 2.04 IMPs better than playing a spade.

Based on the frequencies in this simulation, suppose GIB deals 20 hands before leading at trick 3. 8% of the time, the results will say to lead a spade, and 92% of the time the results will say to lead a heart.

So if you're saying the heart lead is a bug; that's clearly not right. If you're saying the spade lead is a bug, well, that will happen 8% of the time (adjust based on the number of deals); that's not a bug, just how simulations work.

If you're saying both tables should have led a heart, then it's plausible that some code could be built in to synchronise the random seeds in this case where the deals have gone back to equal. But this sounds complex, especially when there are probably similar situations where you wouldn't want to.
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#90 User is offline   Icycookie 

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Posted 2018-December-21, 20:41

icycookie - diana_eva 34-20
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#91 User is offline   toast1 

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Posted 2018-December-21, 20:43

toast1 41-19 smerriman
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#92 User is offline   smerriman 

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Posted 2018-December-21, 21:40

Knew this was going to happen.
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smerriman 10 - 31 GIB
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#93 User is offline   derppp 

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Posted 2018-December-22, 03:03

derppp 46-8 GIB

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derppp 24-57 xbabarx

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#94 User is offline   Wackojack 

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Posted 2018-December-22, 04:42

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Group B
Wackojack 22 Broze 38

You have

2S was given as Michaels. Your next bid as South. There are 17 imps on your decision. Then take a look at B7
May 2003: Mission accomplished
Oct 2006: Mission impossible
Soon: Mission illegal
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#95 User is offline   Natali_ 

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Posted 2018-December-22, 09:04

Natali_ 15/ Sep123 37

Shuba 38/ Natali_17
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#96 User is offline   ye17 

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Posted 2018-December-22, 09:31

ye17 16-10 heart76
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#97 User is offline   Ranmit 

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Posted 2018-December-22, 16:56

Ranmit - Pio_magic 61 - 10 https://webutil.brid...172548&u=ranmit
Ranmit - Sep123 55-18 https://webutil.brid...315411&u=ranmit
Ranmit - Shuba 15 - 15 https://webutil.brid...366323&u=ranmit
Ranmit - Olegru 25 - 32 https://webutil.brid...378971&u=ranmit
Ranmit - Mkgnao 48-15 https://webutil.brid...406153&u=ranmit

Just out of curiosity, what formula have you used for determining the seeding?
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#98 User is offline   barmar 

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Posted 2018-December-22, 21:03

Barmar - Stephen Tu 34 - 16
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#99 User is offline   Ranmit 

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Posted 2018-December-23, 03:43

Ranmit - GIB 47 - 30 https://webutil.brid...542859&u=ranmit
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#100 User is offline   Wackojack 

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Posted 2018-December-23, 08:22

Wackojack 34 Ranmit 31
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May 2003: Mission accomplished
Oct 2006: Mission impossible
Soon: Mission illegal
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