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when the spade jack is lead at trick 10, it is 100% obvious
to take the queen and lead the club ten.
There can be no second choice whatsoever.
The robot however ducks! Giving up a trick.
This makes me believe that GIB enters a "Dont care" zone
when it realizes the contract cannot be beat, even at matchpoints.
http://tinyurl.com/zcv27gf
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Robot gives away free overtricks at matchpoints when it realizes it cannot defeat the contract skip all the way to the tenth trick
#2
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Posted 2016-January-09, 15:25
Ummm - no hand
Psych (pron. saik): A gross and deliberate misstatement of honour strength and/or suit length. Expressly permitted under Law 73E but forbidden contrary to that law by Acol club tourneys.
Psyche (pron. sahy-kee): The human soul, spirit or mind (derived, personification thereof, beloved of Eros, Greek myth).
Masterminding (pron. m
s
t
r-m
nd
ing) tr. v. - Any bid made by bridge player with which partner disagrees.
"Gentlemen, when the barrage lifts." 9th battalion, King's own Yorkshire light infantry,
2000 years earlier: "morituri te salutant"
"I will be with you, whatever". Blair to Bush, precursor to invasion of Iraq
Psyche (pron. sahy-kee): The human soul, spirit or mind (derived, personification thereof, beloved of Eros, Greek myth).
Masterminding (pron. m
str-mnding) tr. v. - Any bid made by bridge player with which partner disagrees."Gentlemen, when the barrage lifts." 9th battalion, King's own Yorkshire light infantry,
2000 years earlier: "morituri te salutant"
"I will be with you, whatever". Blair to Bush, precursor to invasion of Iraq
#3
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Posted 2016-January-09, 17:19
sorry, linked added to hand
#4
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Posted 2016-January-09, 19:47
It appears that West simulates holdings, and all of his simulations say that North's last non-spade is ♥J, in which case his play actually doesn't matter. Ick!
#5
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Posted 2016-January-09, 22:26
It doesn't matter what north's last nonspade is. West wins q and leads club. If north discards then west wins trick 12. If north ruffs then west wins trick 13. OP is correct. There is no simulation where west ducking does not concede a trick
Psych (pron. saik): A gross and deliberate misstatement of honour strength and/or suit length. Expressly permitted under Law 73E but forbidden contrary to that law by Acol club tourneys.
Psyche (pron. sahy-kee): The human soul, spirit or mind (derived, personification thereof, beloved of Eros, Greek myth).
Masterminding (pron. mstr-mnding) tr. v. - Any bid made by bridge player with which partner disagrees.
"Gentlemen, when the barrage lifts." 9th battalion, King's own Yorkshire light infantry,
2000 years earlier: "morituri te salutant"
"I will be with you, whatever". Blair to Bush, precursor to invasion of Iraq
Psyche (pron. sahy-kee): The human soul, spirit or mind (derived, personification thereof, beloved of Eros, Greek myth).
Masterminding (pron. m
str-mnding) tr. v. - Any bid made by bridge player with which partner disagrees."Gentlemen, when the barrage lifts." 9th battalion, King's own Yorkshire light infantry,
2000 years earlier: "morituri te salutant"
"I will be with you, whatever". Blair to Bush, precursor to invasion of Iraq
#6
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Posted 2016-January-09, 23:51
1eyedjack, on 2016-January-09, 22:26, said:
It doesn't matter what north's last nonspade is. West wins q and leads club. If north discards then west wins trick 12. If north ruffs then west wins trick 13. OP is correct. There is no simulation where west ducking does not concede a trick
Yes, any (reasonable) human would have played as you say. But we all (should) know that this is not how GIB approaches the problem. GIB runs simulations to determine likelihoods of various holdings, and if his sample size is too small, weird things can happen.
But, I wonder whether the 2♠ bid should preclude the possibility that North has exactly 5 spades and 4 hearts.
#7
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Posted 2016-January-10, 03:13
You are right. Blind spot my side. Had visions of Heart Jack being high.
Psych (pron. saik): A gross and deliberate misstatement of honour strength and/or suit length. Expressly permitted under Law 73E but forbidden contrary to that law by Acol club tourneys.
Psyche (pron. sahy-kee): The human soul, spirit or mind (derived, personification thereof, beloved of Eros, Greek myth).
Masterminding (pron. mstr-mnding) tr. v. - Any bid made by bridge player with which partner disagrees.
"Gentlemen, when the barrage lifts." 9th battalion, King's own Yorkshire light infantry,
2000 years earlier: "morituri te salutant"
"I will be with you, whatever". Blair to Bush, precursor to invasion of Iraq
Psyche (pron. sahy-kee): The human soul, spirit or mind (derived, personification thereof, beloved of Eros, Greek myth).
Masterminding (pron. m
str-mnding) tr. v. - Any bid made by bridge player with which partner disagrees."Gentlemen, when the barrage lifts." 9th battalion, King's own Yorkshire light infantry,
2000 years earlier: "morituri te salutant"
"I will be with you, whatever". Blair to Bush, precursor to invasion of Iraq
#8
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Posted 2016-January-10, 06:37
At the 3 card ending the following information is available to West - only based on the actual play
North has a singleton club (He dropped a ♥ at trick 3)
North has a least 3 diamonds (He followed 3 rounds)
North started with 3 ♥s as he ruffed a ♥ in trick 10
North started with exactly 5 ♠s, neither partner nor dummy could follow the third round of spades
So the actual situation is 100 % known
So there must be a flaw in the GIB software
North has a singleton club (He dropped a ♥ at trick 3)
North has a least 3 diamonds (He followed 3 rounds)
North started with 3 ♥s as he ruffed a ♥ in trick 10
North started with exactly 5 ♠s, neither partner nor dummy could follow the third round of spades
So the actual situation is 100 % known
So there must be a flaw in the GIB software
Thorvald Aagaard
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http://www.netbridge.dk
http://www.thorvald.dk
Mobile : +45 22 99 55 25
http://www.netbridge.dk
http://www.thorvald.dk
#9
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Posted 2016-January-10, 10:07
goffster, on 2016-January-09, 15:16, said:
when the spade jack is lead at trick 10, it is 100% obvious
to take the queen and lead the club ten.
There can be no second choice whatsoever.
The robot however ducks! Giving up a trick.
This makes me believe that GIB enters a "Dont care" zone
when it realizes the contract cannot be beat, even at matchpoints.
http://tinyurl.com/zcv27gf
to take the queen and lead the club ten.
There can be no second choice whatsoever.
The robot however ducks! Giving up a trick.
This makes me believe that GIB enters a "Dont care" zone
when it realizes the contract cannot be beat, even at matchpoints.
http://tinyurl.com/zcv27gf
so you think GIB is bad?
i hope you can see how GIB plays 4♠ here:
{comments}
#10
- Csaba the Hutt
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Posted 2016-January-10, 10:26
Use {hv=http://www.bridgebase.com/etcetcetc}400|300{/hv} but square brackets instead of curly ones.
And yes, wow.
edit: wow squared!! I didn't even see the play in hearts. wtf
... and I can prove it with my usual, flawless logic.
George Carlin
George Carlin
#11
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Posted 2016-January-10, 10:50
thorvald, on 2016-January-10, 06:37, said:
...North started with 3 ♥s as he ruffed a ♥ in trick 10...
So the actual situation is 100 % known
So there must be a flaw in the GIB software
So the actual situation is 100 % known
So there must be a flaw in the GIB software
You're right! I missed the ruff.
#12
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Posted 2016-January-10, 23:05
Referring to OP's hand, yeah that's really bizarre. Hand is double dummy at that point, GIB shouldn't be getting this wrong. Interestingly I put it into my ancient home copy of GIB, it makes the exact same error. Inexplicable.
#13
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Posted 2016-January-17, 19:03
gwnn, on 2016-January-10, 10:26, said:
edit: wow squared!! I didn't even see the play in hearts. wtf
Perhaps some disgruntled employee has inserted a misere mode into GIB?
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones -- Albert Einstein
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