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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。1 {4 A3 T# {8 z+ I) \; ^
那么,平局、主胜、客胜就有以下表达式:
$ v% f: p% G* YA(d) = {W(ij)|i=j, i∈N, j∈N}
: }. _$ x* B) Q. p+ b3 ]" m# K- ZA(h) = {W(ij)|i>j, i∈N, j∈N}, c8 p# A8 w* F1 J& z
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]:
" `! }0 W6 ?& V% T3 W: pP(i)=P(Ai), i∈{0, 1, 2}
, v+ v+ V e0 A' Y/ N( G+ B+ I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)3 L* U. Q1 {9 ?( z
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:
5 W l* y5 M, L% x2 I{b(h) , 即上面所述的A(d)结果发生$ B" ^+ c2 N4 q- R) F8 s5 j
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
% C! ?) g4 b) U{0 , 即上面所述的A(a)结果发生* p+ j1 X% J5 j5 U6 h) P: t; f8 s
以及
: Y5 N; j* `& d! e4 ^6 O{b(a) , 即上面所述的A(d)结果发生
, \3 F$ Q: `" K( r" f4 V/ }. Q1 Y# P1 ~R(2)={0, 即上面所述的A(h)结果发生" e; z0 R8 l, Y3 p
{O(a)*b(a),即上面所述的A(a)结果发生
! C3 u4 X3 P0 h5 Y* n! p3 E: B2 m. p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
# b, h5 B: B0 Z) j8 D那么投注主客的期望回报总数分别为
- {9 w; S ~- P0 g) x9 O& NE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
. J8 O {& i9 w2 _( S: V: |4 HE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)] Y; b/ R( ], H8 U+ U5 Y9 l' Y4 `
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
* }/ _' T1 ]8 Y5 _E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
+ V* X: ]' C; h1 j. E$ E$ UP(d)+p(h)O(h)=11 T" V, I- g; q Q7 h
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
& n; F4 e- n6 \ i5 E" J# o) }9 ~E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)& y9 E" h# g; S. j
P(d)+p(a)O(a)=1& P( q, M* x! @" {; n" k+ ?8 q( O( g
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4 w' p$ O. ^! R3 R$ q: j, M3 _
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
2 ?+ W9 c4 K/ W4 Y2 l5 Z$ L三、半球盘的计算描述
( D: V9 T- r6 e) {: g& G3 {接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
h% x" U) l( \* y$ c$ i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:
7 p% ]; x5 ]# F7 F{O(h)*b(h),即上面所述的A(d)结果发生% W8 _/ m9 A9 s; {) m
R(1)={O(h)*b(h),即上面所述的A(h)结果发生 a6 V* @2 G& r# G2 X
{0 , 即上面所述的A(a)结果发生
/ _' B( ~# F/ W. x0 T2 Y以及
0 J1 Q1 O8 q9 N: D0 c. U! U* i{0 , 即上面所述的A(d)结果发生 x! w0 ^: o$ L0 o& r
R(2)={0, 即上面所述的A(h)结果发生# q/ {9 w2 T. A' @* n
{O(a)*b(a),即上面所述的A(a)结果发生' X( O( c/ }% X s
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
. g B- u6 D. C v4 K投注主客的期望回报总数分别为: A. ~: v' E5 r. M, N/ N8 e
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]6 Q3 h9 Z- R3 |! p1 A i# u
E[R(2)]=P(a)*O(a)*b(a); N# w* U# C& W% I' ~: n7 u
假设实际投注回报与期望投注回报相等
! \- I$ f# x* r& ~- pE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
1 i6 w/ Q) c! K, X5 D: I/ kO(h)*[P(d)+p(h)]=1; X% d" N: i4 U4 L8 u
O(h)=1/[P(d)+p(h)]& M' l7 @2 Z7 @+ ~% D1 \5 k
E[R(2)]=P(a)*O(a)*b(a)=b(a)
2 n$ ]& y) D9 L4 [0 w; D3 RP(a)*O(a)=1
9 x( \0 i. n1 A1 G3 a3 ]$ tO(a)=1/P(a)
% A4 H5 e8 b0 I/ I同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率6 h0 R% L3 q; P& l
O(h)=1/p(h)1 F% ?( X5 J: [0 a
O(a)=1/[P(d)+p(a)]. F8 n' h2 v, v% B. l2 ~8 c
四、平半球盘的计算描述' H& L+ _( g& L
这个稍复杂一点. c a. f* W- O: ]
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
/ B- G( E! D, A0 l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:
1 c, Z# `4 \6 K3 _{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生8 K$ [- A& @$ H$ p8 n
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生# a7 \% a [1 {( y# [$ ^
{0, 即上面所述的A(a)结果发生
( }& D1 b' n: U) J) V以及. X) o2 f- O' A
{1/2×b(a) , 即上面所述的A(d)结果发生# O! D: {' n6 C& n2 f7 D
R(2)={0, 即上面所述的A(h)结果发生+ \$ k8 d t2 J
{O(a)*b(a), 即上面所述的A(a)结果发生1 E s+ X! U- ]9 p
投注主客的期望回报总数分别为
* }+ A( r0 o1 RE[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))
+ C3 l2 a2 v6 z* Q1 C5 cE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]
& x6 f& Q0 p3 U和上面计算过程相似,得出:4 H& x5 D' i3 |( s7 |2 [5 A
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)% E7 X0 k0 [( {' |$ Q5 x
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
+ K9 o! A! f( WO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
) C1 S# x2 s- a1 W' j+ E% cO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
% x# q4 d% ~* p+ AE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
' c5 w5 k$ n+ ~& A" B9 V- ?: o+ ^& S1/2×P(d)+P(a)*O(a)=19 H! d7 P$ }& U7 w
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
* y; ]( e7 e% L" S, s# j7 ~9 Q# X同样主队让平半就分别是# z7 x4 P4 A- |; t+ O
O(h)=(1-P(d)/2)/P(h)) R- z. l+ L! {
O(a)=(1-P(d)/2)/(P(d)/2+P(a))+ G$ A% `2 |: M. h) \2 ?- c6 y
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)
" y% A. y) i; Z# v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, ] H7 H5 a! |' B8 Q& M
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}1 J; d5 D4 `! A/ a/ h
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}$ W- F8 g- u3 u; z$ x: a W9 }& Y
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
, M) F( t9 B, F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:
) N2 Z- {* Z" u, Z P{b(h)*O(h) , 即上面所述的B(d)结果发生
. W; Z) V$ \. I; B: u. BR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生. |+ M+ L5 z' Z% ^6 w
{0 , 即上面所述的B(a)结果发生
# @2 C- m: a& R4 d- M# V以及4 @5 z4 l- l7 `" S1 Z
{b(a) , 即上面所述的B(d)结果发生5 U% s3 @1 z8 y4 {0 H/ g0 K$ ]
R(2)={0, 即上面所述的B(h)结果发生. ^+ r8 d; V2 m( S ], T
{O(a)*b(a),即上面所述的B(a)结果发生2 r6 ?1 A2 A. ~+ }' C# v6 D
投注主客的期望回报总数分别为
0 M4 y% O4 c5 h* v* w2 {- VE[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 v9 T$ }# t$ p" A
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
6 A8 Z' v; M- q0 W O! z假设实际投注回报与期望投注回报相等9 c( ^7 q o+ w0 ^
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)+ L4 N$ z9 N, B
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
6 y& @" I- ^ [! YO(h)*(P(h)-P(h1))=1-P(h1) _) Z$ Y8 Z5 d3 V
O(h)=(1-P(h1))/(P(h)-P(h1))
7 u+ F! P# J3 `- _E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
^% _: b3 A# m: o* R3 [P(h1)+O(a)-P(h)*O(a)=14 E1 P+ L4 q! x* {9 C0 F4 L
O(a)*(1-P(h))=1-P(h1)# K; M, B% y- B8 r
O(a)=(1-P(h1))/(1-P(h))% B5 a1 V, P) E
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。
: o1 \5 n0 b5 B. C& o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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