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opening lead : ウィキペディア英語版
opening lead
The opening lead is the first card played in the playing phase of a contract bridge deal. The defender sitting to the left (LHO) of the declarer is the one who makes the opening lead. Since it is the only card played while dummy's cards are still concealed, it can be critical for the outcome of the deal. Making the best opening lead is a combination of selecting the best suit and then the best card within that suit.
==Selecting the suit==
Considerations are:
*Good suits to lead may be:
*
*a suit partner has bid
*
*a suit not bid by declarer's side
*
*a suit bid by declarer's partner
*Against a suit contract:
*
*a short suit lead may be good, but only when it is likely that partner will be able to obtain the lead and return the suit.
*
*but leading a suit containing an ace may be bad
*Against NT contracts
*
*leading a long suit may be good
*
*leading a suit in which partner could have length may be good
*Choosing an aggressive or safe lead is important:
*
*defeating some contracts calls for aggressive leads, while others call for safe leads. For example, take a look at the following deal:
North and South have reached a contract of 4, which has some possibilities. At first glance the declarer seems to be losing a spade, a heart, maybe a diamond if the finesse fails and a club or maybe more. However, if the opening lead is the 2 (a safe lead) Declarer will find it much easier to make the contract because he will have time to set up the diamond suit. The 4 lead (an aggressive lead) will make his job more difficult.
*
*the best of both worlds is a lead that is both aggressive and safe, for example leading a suit headed by an honour sequence will give little away and may well set up tricks for the defence

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「opening lead」の詳細全文を読む



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