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Event 15 information and score reporting

smerriman

By smerriman
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hrothgar

hrothgar

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Our work on improving GIB is primarily focused on fixing problems in the bidding database. We actively welcome reports on these issues.

 

Here are couple hands from this event that I found annoying

 

In my world, this is not a raise to 2!S over a double

 

https://www.bridgebase.com/tools/handviewer.html?bbo=y&lin=pn%7Chrothgar%2CRobot%2CRobot%2CRobot%7Cst%7C%7Cmd%7C1SKQ952HJ9D4CAKJT4%2CSJHAK73DQ9732CQ95%2CSA7643HT854DA5C87%2CST8HQ62DKJT86C632%7Csv%7CN%7Cah%7CBoard%2015%7Cmb%7C1S%7Can%7CMajor%20suit%20opening%20--%205%2B%20%21S%3B%2011-21%20HCP%3B%2012-22%20total%20points%7Cmb%7CD%7Can%7CTakeout%20double%20--%203-5%20%21C%3B%203-5%20%21D%3B%203-4%20%21H%3B%202-%20%21S%3B%2012%2B%20total%20points%7Cmb%7C2S%7Can%7CFree%20raise%20--%203%2B%20%21S%3B%206-10%20total%20points%7Cmb%7C3D%7Can%7CFree%20bid%3B%20new%20suit%20--%204%2B%20%21D%3B%206-10%20total%20points%7Cmb%7CP%7Cmb%7CP%7Cmb%7C3S%7Can%7CThe%20Law%3A%209%20trump%20-%3E%203%20level%20--%204%2B%20%21S%3B%206-10%20total%20points%7Cmb%7CP%7Cmb%7CP%7Cmb%7CP%7Cpc%7CHK%7Cpc%7CH4%7Cpc%7CH2%7Cpc%7CH9%7Cpc%7CHA%7Cpc%7CH5%7Cpc%7CH6%7Cpc%7CHJ%7Cpc%7CH7%7Cpc%7CH8%7Cpc%7CHQ%7Cpc%7CS2%7Cpc%7CSK%7Cpc%7CSJ%7Cpc%7CS3%7Cpc%7CST%7Cpc%7CSQ%7Cpc%7CD2%7Cpc%7CS4%7Cpc%7CS8%7Cpc%7CD4%7Cpc%7CD3%7Cpc%7CDA%7Cpc%7CD6%7Cpc%7CD5%7Cpc%7CDK%7Cpc%7CS5%7Cpc%7CD7%7Cpc%7CCA%7Cpc%7CC5%7Cpc%7CC7%7Cpc%7CC2%7Cpc%7CCK%7Cpc%7CC9%7Cpc%7CC8%7Cpc%7CC6%7Cpc%7CCJ%7Cpc%7CCQ%7Cpc%7CS6%7Cpc%7CC3%7Cpc%7CHT%7Cpc%7CD8%7Cpc%7CS9%7Cpc%7CH3%7Cpc%7CCT%7Cpc%7CD9%7Cpc%7CS7%7Cpc%7CDJ%7Cpc%7CSA%7Cpc%7CDT%7Cpc%7CC4%7Cpc%7CDQ%7C

 

 

I think that GIB needs to cue bid its diamond control

 

https://www.bridgebase.com/tools/handviewer.html?bbo=y&lin=pn%7Chrothgar%2CRobot%2CRobot%2CRobot%7Cst%7C%7Cmd%7C2SAK862HAKJ983DT3C%2CS753H75DK8542CQT4%2CST94HQ42DACA97653%2CSQJHT6DQJ976CKJ82%7Csv%7C0%7Cah%7CBoard%208%7Cmb%7CP%7Cmb%7CP%7Cmb%7CP%7Cmb%7C1S%7Can%7CMajor%20suit%20opening%20--%205%2B%20%21S%3B%2011-21%20HCP%3B%2012-22%20total%20points%7Cmb%7CP%7Cmb%7C2C%21%7Can%7CDrury%20--%203%2B%20%21S%3B%2011-%20HCP%3B%2010-12%20total%20points%7Cmb%7CP%7Cmb%7C4C%21%7Can%7CSplinter%20--%201%20%21C%3B%205%2B%20%21S%3B%2021-%20HCP%3B%2018-22%20total%20points%7Cmb%7CP%7Cmb%7C4S%7Can%7C3%2B%20%21S%3B%2011-%20HCP%3B%2010-12%20total%20points%7Cmb%7CP%7Cmb%7CP%7Cmb%7CP%7Cpc%7CH7%7Cpc%7CH2%7Cpc%7CHT%7Cpc%7CHA%7Cpc%7CSA%7Cpc%7CS3%7Cpc%7CS4%7Cpc%7CSQ%7Cpc%7CSK%7Cpc%7CS5%7Cpc%7CS9%7Cpc%7CSJ%7Cpc%7CS2%7Cpc%7CS7%7Cpc%7CST%7Cpc%7CD6%7Cpc%7CDA%7Cpc%7CD7%7Cpc%7CD3%7Cpc%7CD8%7Cpc%7CCA%7Cpc%7CC8%7Cpc%7CDT%7Cpc%7CC4%7Cpc%7CHQ%7Cpc%7CH6%7Cpc%7CH3%7Cpc%7CH5%7Cpc%7CH4%7Cpc%7CC2%7Cpc%7CHK%7Cpc%7CD4%7Cmc%7C13%7C

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smerriman
smerriman

Knew this was going to happen. https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:46aee998.0597.11e9.a82b.0cc47a39aeb4-1545448289&u=smerriman smerriman 10 - 31 GIB

olegru
olegru

Cherdano - Olegru part 1 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:32010184.37eb.11e9.a82b.0cc47a39aeb4-1550981890&u=olegru Cherdano 12 - Olegru 30 olegru Score: 18.00 IMPs   Ch

Wackojack
Wackojack

I proudly present a victory for GIB   https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:9e3cdc54.02de.11e9.a82b.0cc47a39aeb4-1545149077&u=Wackojack   Wackojack 2 GIB 19

barmar

barmar

Posted
Posted

Here are couple hands from this event that I found annoying

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

I think that GIB needs to cue bid its diamond control

 

https://www.bridgebase.com/tools/handviewer.html?bbo=y&lin=pn%7Chrothgar%2CRobot%2CRobot%2CRobot%7Cst%7C%7Cmd%7C2SAK862HAKJ983DT3C%2CS753H75DK8542CQT4%2CST94HQ42DACA97653%2CSQJHT6DQJ976CKJ82%7Csv%7C0%7Cah%7CBoard%208%7Cmb%7CP%7Cmb%7CP%7Cmb%7CP%7Cmb%7C1S%7Can%7CMajor%20suit%20opening%20--%205%2B%20%21S%3B%2011-21%20HCP%3B%2012-22%20total%20points%7Cmb%7CP%7Cmb%7C2C%21%7Can%7CDrury%20--%203%2B%20%21S%3B%2011-%20HCP%3B%2010-12%20total%20points%7Cmb%7CP%7Cmb%7C4C%21%7Can%7CSplinter%20--%201%20%21C%3B%205%2B%20%21S%3B%2021-%20HCP%3B%2018-22%20total%20points%7Cmb%7CP%7Cmb%7C4S%7Can%7C3%2B%20%21S%3B%2011-%20HCP%3B%2010-12%20total%20points%7Cmb%7CP%7Cmb%7CP%7Cmb%7CP%7Cpc%7CH7%7Cpc%7CH2%7Cpc%7CHT%7Cpc%7CHA%7Cpc%7CSA%7Cpc%7CS3%7Cpc%7CS4%7Cpc%7CSQ%7Cpc%7CSK%7Cpc%7CS5%7Cpc%7CS9%7Cpc%7CSJ%7Cpc%7CS2%7Cpc%7CS7%7Cpc%7CST%7Cpc%7CD6%7Cpc%7CDA%7Cpc%7CD7%7Cpc%7CD3%7Cpc%7CD8%7Cpc%7CCA%7Cpc%7CC8%7Cpc%7CDT%7Cpc%7CC4%7Cpc%7CHQ%7Cpc%7CH6%7Cpc%7CH3%7Cpc%7CH5%7Cpc%7CH4%7Cpc%7CC2%7Cpc%7CHK%7Cpc%7CD4%7Cmc%7C13%7C

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.

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mlbridge

mlbridge

Posted
Posted

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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hrothgar

hrothgar

Posted
Posted

 

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.

 

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.

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smerriman

smerriman

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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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Wackojack

Wackojack

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Posted

https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:6b4c2cca.02de.11e9.a82b.0cc47a39aeb4-1545148991&u=Wackojack

 

Group B

Wackojack 22 Broze 38

 

You have [hv=pc=n&s=sat8642hdjtcaq762&d=s&v=b&b=7&a=1sp1n2s]133|200[/hv]

2S was given as Michaels. Your next bid as South. There are 17 imps on your decision. Then take a look at B7

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Ranmit

Ranmit

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Posted

Ranmit - Pio_magic 61 - 10 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:43fe10bc.0315.11e9.a82b.0cc47a39aeb4-1545172548&u=ranmit

Ranmit - Sep123 55-18 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:e51630e1.0461.11e9.a82b.0cc47a39aeb4-1545315411&u=ranmit

Ranmit - Shuba 15 - 15 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:6f187a8c.04d8.11e9.a82b.0cc47a39aeb4-1545366323&u=ranmit

Ranmit - Olegru 25 - 32 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:e1e8a190.04f5.11e9.a82b.0cc47a39aeb4-1545378971&u=ranmit

Ranmit - Mkgnao 48-15 https://webutil.bridgebase.com/v2/tview.php?t=ARDCHALLENGE:2be05ccb.0535.11e9.a82b.0cc47a39aeb4-1545406153&u=ranmit

 

Just out of curiosity, what formula have you used for determining the seeding?

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