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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。! h( i. V% j' a9 [
; m8 O" i5 @7 n ~% A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。
5 b+ G. O4 r# y6 L5 A# A0 t& }) C* n, T1 E4 I
严格来计算德扑概率应该这样:- p! L5 @. ^; Y; q. z3 p A
; u2 K* ]. r. G1 T, a# t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;/ x; {" C3 h+ i3 ~" u# a& q5 f
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你想要的牌是4张5和4张10,共4+4=8张。0 o% @! U. z7 u5 W7 _* g& J! c1 i
: ~% t4 M [$ X; O那么此时,你在河牌中顺子的概率为:8/46=0.1739,即17%。
' K' \: u! M9 `2 r9 G/ ]/ }* [ W) f+ ~" t+ }5 t6 V) y5 e5 S
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,
5 W9 P( p$ B. ]8 x( v3 X) K5 \' g& D5 A8 A: Q* y
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。' L, }: H4 y& Y& l9 N
8 l+ a1 L( m/ }! _( `( [. A这是四二法则中的“二”。 J# g4 }0 l" O- R: |0 |! K
4 u' c C7 }# a! D# \2 S2 E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。) v7 r$ L5 H7 {; h$ a: j: m
' v3 d, w6 h1 ^" T4 i$ Y% N- K比如桌子上翻牌为A-6-7,你的手牌依旧是8,9。" R+ V9 T; Q) w
5 V3 ^, A% A$ e. X6 S
不一样的是,你有两轮机会来等5或者10,共8张想要的牌/ t9 C* P6 t7 w0 v3 o/ G& h$ m
z6 i5 P4 R8 R" }2 e那么两轮内你中顺子的概率为:
+ |8 N7 C1 M. i- C4 L4 E
: }3 O' W9 _, L$ p1-(47-8)/47*(46-8)/46=0.3145,即约为31%。8 P/ A! G4 D/ F5 {9 A* @3 j
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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。- p* [ V- v. L2 L8 E* V5 i
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这就是四二法则中的“四”。, f1 J6 T7 d1 L; C1 u
3 T+ B0 j' A; s7 m% V6 w( i% B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。9 @; c" L( g2 \9 a
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