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一、我们先假设一个抽样数W={W(ij)|i,j∈N}, W(ij)就是比赛的进球结果,i,j分别表示主客队的进球数。
) h+ {$ A8 }2 ]! h3 z$ i" Z那么,平局、主胜、客胜就有以下表达式: h, i! d& n( W! k- Q; ? i
A(d) = {W(ij)|i=j, i∈N, j∈N}
" k" m: w8 |8 n7 X' G# ^3 gA(h) = {W(ij)|i>j, i∈N, j∈N}! t4 q2 m0 W% y
A(a) = {W(ij)|i 接着我们引入一个符号P(i)表示平胜负的概率,P(Ai)∈[0,1]:% B) ~. ~% g: p8 ]0 g% j* S/ x
P(i)=P(Ai), i∈{0, 1, 2}* p4 K# a+ X. |
二、首先来说说平手盘(即0:0Handicaps或我们经常在国外上看到的(Moneyline)
` m- ~) ]/ Q假设b(h)表示主队的投注总数,b(a)表示客队的投注总数,那么投注主客队的回报总数额为:
; O5 b/ e( L+ [, J{b(h) , 即上面所述的A(d)结果发生7 Q4 v: @+ N L4 d) ^2 w9 A$ E2 [1 e* \
R(1)={O(h)*b(h),即上面所述的A(h)结果发生( S6 J- L& r! v1 r
{0 , 即上面所述的A(a)结果发生
5 m' w8 t# ` Q( Z. C. ^' C以及" Y! k( v1 L5 _
{b(a) , 即上面所述的A(d)结果发生
, W3 k e" g5 _3 G1 h* h, PR(2)={0, 即上面所述的A(h)结果发生
- ^, Z1 h: t- H9 M4 m Z& x% F! n" } |{O(a)*b(a),即上面所述的A(a)结果发生% S! H3 C. A g- ]
如果O(h)表示平手盘下的主队赔率,O(a)表示平手盘下的客队赔率: N7 D/ y) ?$ h3 u# E# p
那么投注主客的期望回报总数分别为; ^4 W* O' j% t
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]0 Q* d' ]+ W% `% O5 D9 y# @' z
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]4 G% {6 q5 z' C
按照真实赔率(暂不包含庄家优势),我们可以认为实际投注回报与期望投注回报相等
' G W5 |- S# }: ^0 H6 U5 @1 xE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
7 s% w0 O. \6 A+ E) o t XP(d)+p(h)O(h)=1( h/ s$ v Y; u
O(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式
# G- g% h7 X- |5 c. b1 b" H- V, DE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
8 B- s" s3 U. F* B: r* t# {0 A" vP(d)+p(a)O(a)=1& D# V, t) b: L: J( n
O(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式
7 u; U! ]* w2 f% o在极端情况下,可以认为平手盘亚洲赔率(或moneyline),就是在不发生平局结果条件下(就是公式中P(d)=0),主胜客胜概率的倒数
) U( I* Z5 { J9 l6 F三、半球盘的计算描述7 R- F3 p9 |( @7 b% i
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
9 o7 `8 B3 U, I& x还是假设b(h)表示主队的投注总数,b(a)表示客队的投注总数,那么投注主客队的回报总数额为:0 w8 W& d! c- c5 L
{O(h)*b(h),即上面所述的A(d)结果发生" p! a/ B) @( q8 n
R(1)={O(h)*b(h),即上面所述的A(h)结果发生' d3 O5 i' k$ |. _2 j& \
{0 , 即上面所述的A(a)结果发生. i: r* J+ E2 l0 r0 X
以及
8 Y# k8 `* X2 p( C5 J{0 , 即上面所述的A(d)结果发生
4 k- X) c/ A. T0 D' K' }- r* SR(2)={0, 即上面所述的A(h)结果发生" [ y1 c. @ X0 N! j
{O(a)*b(a),即上面所述的A(a)结果发生
8 d2 a: N" o( ^/ {如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率: T; p7 }7 h2 W l7 ?" t; e
投注主客的期望回报总数分别为, i* f4 K% d9 D6 j# q" m2 P' [+ j% _
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)], q/ W- L# d( ?& ?
E[R(2)]=P(a)*O(a)*b(a)
6 s) p: o8 y1 P- g& t假设实际投注回报与期望投注回报相等
o& M; ` h9 k6 f5 @ `8 dE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h), L ^9 n4 F+ N5 |4 v( i' P
O(h)*[P(d)+p(h)]=1& r: d/ U% S% k
O(h)=1/[P(d)+p(h)]
' R+ O! J; r0 e) G. Q3 UE[R(2)]=P(a)*O(a)*b(a)=b(a)2 `- z# s; Q0 m9 a: Q9 G! D6 [( {
P(a)*O(a)=1
) B9 x% x7 y3 w; |O(a)=1/P(a)/ t2 I2 j' i0 N3 Y$ Q
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
- {2 |, G( _2 l# D1 iO(h)=1/p(h)
% H e# m, f% a9 F- ^O(a)=1/[P(d)+p(a)]
C5 v7 K6 L5 e7 ?四、平半球盘的计算描述" d) f2 M. z2 ?
这个稍复杂一点
! w' e- k' }0 ]/ a* `8 V/ ~$ X7 W接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)8 T& X8 P J, Q0 t
还是假设b(h)表示主队的投注总数,b(a)表示客队的投注总数,那么投注主客队的回报总数额计算:
* o K" O4 c8 q% o6 X7 O# q{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生# d' L/ T# Y1 `5 d% L
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生7 V, m( W* m' }; G) h
{0, 即上面所述的A(a)结果发生" u! ~$ ~: {6 c: {% l H
以及
3 t2 q" Z& p1 {: G{1/2×b(a) , 即上面所述的A(d)结果发生
9 T" s( s& w0 N2 {1 jR(2)={0, 即上面所述的A(h)结果发生* D8 w7 u" p' N& s- T7 Q0 l
{O(a)*b(a), 即上面所述的A(a)结果发生0 J$ n6 O; V8 B, c
投注主客的期望回报总数分别为! N+ J& T- A# D/ u5 M% I
E[R(1)]=P(d)×{[O(h)+1]/2}×b(h)+P(h)×O(h)×b(h)=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))& b, A e O( `5 x' l6 l1 @4 _
E[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]) S, @1 _# e: d4 @. z$ E
和上面计算过程相似,得出:: a, r# k" r: x4 w! T2 d
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
' }0 G# U. t, ?# }. QP(d)×{[O(h)+1]/2}+P(h)×O(h)=1
. o; q5 \! o" }" r$ k- d# v3 XO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
, S. Q: O* m# G2 [O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
; R5 m5 U5 \/ |' {# UE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)2 o1 Q- a, {5 A. ~+ i5 y
1/2×P(d)+P(a)*O(a)=19 E$ P4 v4 T, u) ^0 a, u
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)0 j- R4 z& j9 i! v" j
同样主队让平半就分别是7 c" E; W* D" t
O(h)=(1-P(d)/2)/P(h); F* j x; e( b
O(a)=(1-P(d)/2)/(P(d)/2+P(a))* I7 f+ ?, H0 T' J$ k. ^
五、一球、两球等整数盘(这里先暂时说主队让1球的情况,0:1,Handicaps,其它可以类推的)* `9 \4 p- F2 R: P( F# F
可以采用类似公式,在(一)中我们分别用A(d)、A(h)、A(a)描述平局、主胜、客胜事件的发生。现在改用另外的符号代替,如B(d)、B(h)、B(a),同时除了平、胜、负概率P(i)(i=d,h,a)外,还需要引入一个一个概率值P(hX)来代表主队赢一球(X=1)、二球(X=2)...的概率,下面来进行演算 p4 o Y9 u9 R, g
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
( B8 p! u3 ]7 B+ ]- ^B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
* g* J' y' T5 S, h, ?B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数6 Q4 _2 y9 l# h7 H4 u) H1 a4 o
接着,假设b(h)表示主队的投注总数,b(a)表示客队的投注总数,那么投注主客队的回报总数额为:4 j ?1 ]- D& X
{b(h)*O(h) , 即上面所述的B(d)结果发生
9 J* W+ `- W* Z4 O" \R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生! D: r }; i( B$ a
{0 , 即上面所述的B(a)结果发生$ ~, R) J2 H/ O7 K
以及0 K0 k8 e7 S1 U- @
{b(a) , 即上面所述的B(d)结果发生
" X: W8 @' |& Q" GR(2)={0, 即上面所述的B(h)结果发生
* w6 L+ n/ W0 }# w. C; t: n{O(a)*b(a),即上面所述的B(a)结果发生3 ?' @4 o% i0 o
投注主客的期望回报总数分别为2 ~4 {/ ]' O1 E+ w+ L
E[R(1)]=P(h)*b(h)*O(h)+P(h1)*(b(h)-O(h)*b(h))=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]7 v) o8 V# d$ h5 {! ~( n
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))3 t, z$ s* ~1 H0 z9 u3 j5 Z+ e
假设实际投注回报与期望投注回报相等( [8 _8 [2 G# ?& v' a
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)$ }$ a% o9 n9 w8 W0 y; R
P(h)*O(h)+P(h1)-P(h1)*O(h)=12 Z0 Y" f4 ?2 g& x& _8 b( \5 t
O(h)*(P(h)-P(h1))=1-P(h1). j9 _+ c. N% P9 b
O(h)=(1-P(h1))/(P(h)-P(h1))4 J! M- K; i: G/ u5 M
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
: I i+ _5 Y" B2 f1 Q" Z3 v+ AP(h1)+O(a)-P(h)*O(a)=1
- J* P G+ n. [6 c% S: t* CO(a)*(1-P(h))=1-P(h1)
2 c9 F9 K2 x9 A b/ B* oO(a)=(1-P(h1))/(1-P(h))
5 l C! I: _( z以上(五)部分是让一球的情况,让两球以上整数盘和反过来受让整数盘是可以同样演算的。( i* W3 y6 S2 b x: f
简单小结一球或整数盘,其实理论的演算过程不难,但是如何准确计算赢整数球的概率(P(hi)就是其中的难点,这已经涉及到如何用相对动态实力差或球差来计算各种赢球概率(是指赢1、2、3...球的概率,也可以说是赢球比分概率)的问题,使用自己数据模型里的数据来计算。 |
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