The rule of 15 effect?
#1
Posted 2010-April-28, 08:13
#2
Posted 2010-April-28, 08:26
but give them
qj
qjxxxxx
kjx
qx
and they will open they will
then they rebid 3 hearts
given the chance they bid it again 4 hearts
#3
Posted 2010-April-28, 09:30
mohitz, on Apr 28 2010, 07:13 AM, said:
Rather then help the opps find their part score, I am with the MBC majority here - pass.
"100% certain that many excellent players would disagree. This is far more about style/judgment than right vs. wrong." Fred
"Hysterical Raisins again - this time on the World stage, not just the ACBL" mycroft
#4
Posted 2010-April-28, 09:35
jillybean, on Apr 28 2010, 09:00 PM, said:
Why does it have to be opponents who have a part score? With ATx and 8xx in majors, i think the odds are excellent that we are the ones who have a part score.
On the actual deal, we can take ten tricks in clubs. Opponents can take 8 tricks in diamonds.
#5
Posted 2010-April-28, 09:42
babalu1997, on Apr 28 2010, 03:26 PM, said:
but give them
qj
qjxxxxx
kjx
qx
and they will open they will
then they rebid 3 hearts
given the chance they bid it again 4 hearts
Why not? The result will be cancelled whatever you do.
London UK
#6
Posted 2010-April-28, 15:15
mohitz, on Apr 28 2010, 03:13 PM, said:
Incidentally, this hand fails not only the rule of 15, but also the rule of 20. Now, I myself have no problem opening rule of 18 any seat any vul, but I have noticed that most people I see in the MBC are a bit more conservative...
-- Bertrand Russell
#7
Posted 2010-April-29, 01:03
mohitz, on Apr 28 2010, 09:13 PM, said:
Clear pass in 4th seat. Just because on one particular hand you can make 10 tricks in Cs does not mean it is wrong to pass as the odds favour the opps being able to outbid you.
#8
Posted 2010-April-29, 02:01
The_Hog, on Apr 29 2010, 08:03 AM, said:
mohitz, on Apr 28 2010, 09:13 PM, said:
Clear pass in 4th seat. Just because on one particular hand you can make 10 tricks in Cs does not mean it is wrong to pass as the odds favour the opps being able to outbid you.
I don't think that the odds favor opps.
Since everybody in front of you has passed, you can expect them to hold their share of the average 9 2/3 HCP. Your side will hold 21 HCP more often than 20 and usually holding 20+ HCP you need a positive score to get a good result. Passing will just give you 0.
Since you hold 3 cards in each major, the average length for the remaining 3 player is 3 1/3. That would add to 6 2/3 for opps, so they have 7M cards more often than 6, but 7 is not a fit yet.
So if opps outbid you, they will usually play a 7 card fit and hold less than half of the points, of cause this does not guarantee a good score for your side, but you should have a reasonable chance to score better than 0.
#9
Posted 2010-April-29, 02:49
Rule of 15 is often too conservative. If you have 10 points and 3.33 spades, you expect your side to have half the deck. Probably a little more since second-seat pass has a slightly higher upper limit than 1st and 3rd.
OTOH opps have a tactical advantage in that they both know that they can't make game on force so they have more freedom - our side is constrained by our obligation to show the (sub)minimum. So it must be right to pass some hands even if you expect the par score to be positive.
#10
Posted 2010-April-29, 03:30
mgoetze, on Apr 28 2010, 01:15 PM, said:
mohitz, on Apr 28 2010, 03:13 PM, said:
Incidentally, this hand fails not only the rule of 15, but also the rule of 20.
But it hits 22 on the extended rule of 22 (HCP+2 longest +QT) and is 27 Zar points. Both of these suggest a clear opening hand.
Sounds like it might be worth a quick simulation to see if what double dummy par is on hands where it goes all pass to this hand. My bet is that it is positive for us, which would be evidence in favor of opening (obviously double dummy par is only an approximation, but still).
#11
Posted 2010-April-29, 03:47
George Carlin
#12
Posted 2010-April-29, 03:54
helene_t, on Apr 29 2010, 09:49 AM, said:
Of cause there are, but (AAK) is better in both offense and defense than many opening hands with 12-14 HCP.
#13
Posted 2010-April-29, 04:24
#14
Posted 2010-April-29, 07:28
The_Hog, on Apr 29 2010, 07:03 PM, said:
mohitz, on Apr 28 2010, 09:13 PM, said:
Clear pass in 4th seat. Just because on one particular hand you can make 10 tricks in Cs does not mean it is wrong to pass as the odds favour the opps being able to outbid you.
I am happy for them to outbid me if they go down.
I believe that the USA currently hold only the World Championship For People Who Still Bid Like Your Auntie Gladys - dburn
dunno how to play 4 card majors - JLOGIC
True but I know Standard American and what better reason could I have for playing Precision? - Hideous Hog
Bidding is an estimation of probabilities SJ Simon
#15
Posted 2010-April-29, 15:40
#16
Posted 2010-April-29, 16:36
Just because we 'think' the opponents might have the spades doesn't mean they do. And they might misjudge and get too high.
I like my chances for a plus here, so I open.
Winner - BBO Challenge bracket #6 - February, 2017.
#17
Posted 2010-April-29, 18:14
Phil, on Apr 30 2010, 05:36 AM, said:
Just because we 'think' the opponents might have the spades doesn't mean they do. And they might misjudge and get too high.
I like my chances for a plus here, so I open.
Wasn't it bean counters who caught Goldman Sachs speeding? You are betting on Fabulous Fab I think.
#18
Posted 2010-April-29, 18:18
#19
Posted 2010-April-29, 20:28

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