What is the devil's tactic in bridge? What is the probability that 1- 1 is distributed twice?

Devil tactics in bridge means that people think that cards are difficult to play and can only be played with devil tactics!

I can't remember which European country stipulated in an ordinary bridge duet that whoever wins the Grand Slam first will get the special prize. As the saying goes, "There must be a brave man under the four rewards". A player played a grand slam that seemed to have no chance of winning, but in the end he magically did it. People called his tactical play "devil tactics". The distribution of cards is roughly like this:

N Jia: S: A 1085

H:A K Q×

D:K Q ×

C:K ×

S home page: s: k976

H:× ×

D: A number ××

C: A ××××

The distribution of black centers in the east and west is 2-3, and QJ is separated.

Under normal circumstances, 7S will definitely not pay for this card, but there is a card that may be discovered by Nanjia.

How to design this route is still unclear. You can think for yourself first, if not, then Baidu hello me.

The probability of 1- 1 distribution is 52%, not 50%. This can be understood as:

Because each person has 13 cards in bridge, if one card falls in one house, the probability of another card falling in another house is13/(13+12) = 52%.

Wish progress!