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“四二法则”是一种估算概率的方法,让你能快速计算你想要的牌出现的概率。! f. g3 n4 L9 Q' X; i" ]
! o6 H. p" S. g; B# n比如:桌子上的牌是A-6-7-Q,而你的手牌是8-9。你想要再来一张5或者10来凑成顺子,但你只剩最后一轮机会。
3 Z( M! N, A/ \* j% j) h$ w8 O9 d6 I& w3 E
严格来计算德扑概率应该这样:
5 L" ~( |8 ^* y) s: |' o1 w
0 \/ O( U# W( F, ^* P一副牌52张,去掉翻牌3张,转牌1张,手牌2张,剩下52-3-2-1=46张;
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你想要的牌是4张5和4张10,共4+4=8张。
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那么此时,你在河牌中顺子的概率为:8/46=0.1739,即17%。; P6 X; i1 g- ]; \- e+ |
+ S" _$ t, l; y. a# O* c你可能觉得这样计算会比较麻烦,于是就有了四二法则,即:你想要的牌有4+4=8张,
2 ~# e7 j- L+ s1 z0 x3 g7 B, I8 V# g9 P( v
只剩最后一轮机会,所以让8*2=16,即你有约16%的机会中顺子,与上述17%基本近似。! k3 N5 |/ F; |' u/ u$ p0 Z
+ j' }% o; v+ q8 x' o& b
这是四二法则中的“二”。
3 q, G3 p' p. U4 W2 J+ w! w* ~; g
$ ~; i3 f9 |# j5 l2 R J当然,如果你还有两轮机会的话,即河牌圈与转牌圈,情况是这样的。
4 M6 w) D+ o) T5 N* Q7 n6 E [/ K& L
比如桌子上翻牌为A-6-7,你的手牌依旧是8,9。
7 o1 v* d8 Q4 { h2 u1 Q1 @" e0 y
6 s: z8 T" I s3 w- y不一样的是,你有两轮机会来等5或者10,共8张想要的牌
; B; a1 [9 r9 h
. g4 e8 ^. L* G! W9 T0 N4 M9 r那么两轮内你中顺子的概率为:# |7 F7 ~/ U. g/ ~1 R9 a
- K8 J, {5 @, l7 K8 z) h1 f* O1-(47-8)/47*(46-8)/46=0.3145,即约为31%。
( e9 w- \- j" h$ x6 l( ^6 t; ^' u% p) G
那么利用四二法则,8*4=32,即你约有32%的机会中顺子,是不是跟理论值也很接近。0 e& k9 j4 o/ \: k& p
) G% e, C! h' `, i: K4 ^这就是四二法则中的“四”。
1 v7 u: |1 x( }9 c' p
% Z/ y2 x$ A+ m7 k' ?总之就是,先想好自己想要的牌的张数,然后,还有两轮机会就乘4,还有一轮机会就乘2,得到的就是你想要的牌接下来会出现的概率。接着,根据真人德扑圈的游戏玩家以及战况来决定接下来该怎么办。利用好四二法则,可以帮你快速估算概率。0 H1 z# I3 i$ }2 X
/ \" B& v) O2 n U! \% q8 s1 A- B/ ~; w |
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