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All comments by Yifan Lin
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In my view the obvious lead after this auction for west is S4 or SA
Oct. 27, 2014
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Then what's the use of 1s-2h?
Sept. 7, 2014
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Nice analysis.And i invite you to vote in http://bridgewinners.com/article/view/bidding-problem-5669/,making your answer perfect.
Sept. 4, 2014
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You are right,3s should be forcing.(I forgot it on table since i have no experience playing system without 2/1 FG)But i don't think 3s promise a semi-solid suit.Opener's hand is the one in http://bridgewinners.com/article/view/bidding-problem-5647/ .Please make comment there for your choice 2S?Thanks a lot.
Sept. 4, 2014
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Just make a choice again,it will cover your original choice.
Sept. 4, 2014
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About method a),changing the meaning of 3s and x coule be a better choice?
And what's your preference for 3NT meaning?To play or both minor?

Hope to learn from your explain.Best wishes.
Sept. 3, 2014
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2m rebid,like jump new suit rebid by opener,kill too many spaces.So natural systems do have difficulty to handle.
Sept. 3, 2014
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I learned Vasilevsky convention from Marshall Miles' book <Competitive Bidding in the 21st Century>,it makes some sense here.

2c,transfer to 2d,then bid 2h.Show exactly this hand.

Whether this hand worth to compete in is a more important question,but if you decide to come in,Vasi works well.
Sept. 2, 2014
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My parterner's preempt is quite standard,won't go out of rule of 2/3/4.As your parterner open so aggresively,how do you handle ‘standard’ 3d open hands?Surely in 1/2 seat 3d can't have a wide range?
Sept. 2, 2014
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‘regional standard match’ may not be a good exprss.I don't really know how to describe game environment since i am not an experienced player myself.It's an Chinese national open pair match,but no professional players in general.
Sept. 2, 2014
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MP decision.I think pass is a choice anyway.
Sept. 2, 2014
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It depends on your agreement of opener's rebid after 2h.
In my view,pass is positive,2S=weak maybe light open,x=penalty.Of course there will be various views.
Sept. 2, 2014
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For people using namyats 3NT and 4m open at 1/2 position,3NT promise suit lead by A or K.So we have to open 3d.
Sept. 2, 2014
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difficult choice,but i think i will just bid 1nt after 1h,ready to show club suit weak hand,giving up possible 4-4 spade fit.if i hold 5-5 black suit,i just bid 2h.(someone,especially people using weak 2s response,use 2s as a convention after 2d or 2h rebid,to show some hands like this.maybe invented by Fred Gitelman)
Sept. 1, 2014
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In an old version of Encyclopedia of Bridge,there's some items written by Alan Truscott.Very interesting.

In final throw in situations like
A10X
??? ???
K9X
East play Q back.Declarer's decision depends on the knowledge and strategy of East.If a novice only play Q when he has QJ,then play A wins 100%.But an expert can play Q from QXX,and play 50%Q and 50%J from QJX.That should be the Nash Equalibrum in this situation.

Various interesting topics about game theory with bridge!Like the principle of restriction choices.What's the best strategy if you know your opponent always play Q if he has QJ doubleton?
Aug. 31, 2014
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I use a method learned from Jianjian Wang.

Regarding this aution as defense against 3D open,we use 4M to show M+C two suited hand,not forcing.4D to show one suit strong hands.
Aug. 31, 2014
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i will bid x at first round.if i bid 2s at first round,i think i will pass.
July 20, 2013
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the rule of 20,it's a suitable hand for 1 suit opening,no problem at all.
July 20, 2013
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