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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。# z$ @' g6 l% L6 A9 \
那么,平局、主胜、客胜就有以下表达式:
, Y3 x+ H9 X" uA(d) = {W(ij)|i=j, i∈N, j∈N}
n% S. J+ i5 Y! p0 i: CA(h) = {W(ij)|i>j, i∈N, j∈N}& p% ^, V6 V n8 `/ Z: x+ C
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]:$ Q9 n2 s, Y8 u5 a- @: m0 M
P(i)=P(Ai), i∈{0, 1, 2}: J2 Z, Y9 y" U5 v5 f w' @$ ^8 ]
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), n$ i$ j- q2 l* P ~! V
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:
8 o0 E' O, w& F+ v0 J" v{b(h) , 即上面所述的A(d)结果发生
3 U; c7 x3 i. }' l; UR(1)={O(h)*b(h),即上面所述的A(h)结果发生+ _5 D" \4 a( z* m" ?
{0 , 即上面所述的A(a)结果发生! {! X1 a& f; Q; ]
以及
; ^& A d, P% [& W& {{b(a) , 即上面所述的A(d)结果发生
) x1 t0 @! S5 b) XR(2)={0, 即上面所述的A(h)结果发生# b) C4 Z4 }* T* J% ]
{O(a)*b(a),即上面所述的A(a)结果发生
8 Z- j# _% @# k8 }* | u- {5 _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, h8 z1 y. E4 p7 A, d
那么投注主客的期望回报总数分别为) Z: L7 K) F% M# }
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]% g/ u3 F" t/ S4 Q6 E n7 b# Z
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
. H w; G/ P% `% h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
" d- N3 _7 ~& e# g- FE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)/ l( r4 P5 e2 y l; `
P(d)+p(h)O(h)=11 ?; ]" t7 x9 D# v0 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$ Y1 _4 J# Q K" m; ]/ k
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)7 e% Z! O& h+ P7 ^6 }/ o
P(d)+p(a)O(a)=1
6 v' ^0 u( E; S+ B! v9 U, e: AO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式
* h% i, K0 G6 h1 k9 Z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
! f5 X9 Q2 U+ k, [9 e三、半球盘的计算描述/ H. z4 L: l( `7 l( j
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)0 O+ x4 o, d$ V* O# ~( y% E9 O( v
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:
2 p# C) D6 W/ w9 O9 \4 F' A: K: P{O(h)*b(h),即上面所述的A(d)结果发生
: q- X6 X7 {( O" g8 uR(1)={O(h)*b(h),即上面所述的A(h)结果发生
- Z3 r0 j* u. Z{0 , 即上面所述的A(a)结果发生
; `- W( W: C' M ^以及/ z5 E: `3 a& A8 ^; w5 s
{0 , 即上面所述的A(d)结果发生% C$ c4 u: p* B& I. h4 X
R(2)={0, 即上面所述的A(h)结果发生
, ~% b2 I$ w, ~7 {{O(a)*b(a),即上面所述的A(a)结果发生* o. N) I4 {; B8 I2 c+ u( Y, g
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
4 C$ r* S2 A3 S投注主客的期望回报总数分别为
, f7 D7 m6 v$ p/ n* K: \, W! wE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
9 u6 j' S% Q& iE[R(2)]=P(a)*O(a)*b(a)
/ R% I2 @! s9 C/ I假设实际投注回报与期望投注回报相等
4 |& y; y' _5 A; `: a0 x- O+ U2 w# k& NE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
; M+ w" w5 a6 M1 B& {! u0 [6 t( RO(h)*[P(d)+p(h)]=19 G- a# B- ~3 B
O(h)=1/[P(d)+p(h)]; f0 R5 R" @$ F1 c6 B9 f* {2 {6 N4 D
E[R(2)]=P(a)*O(a)*b(a)=b(a)
" E3 s$ m& G4 bP(a)*O(a)=1: H2 S. b. _8 ]* R: I( V, ?
O(a)=1/P(a)
6 S3 s8 l" L# H2 v5 m: s同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率' t8 V* M: k; K9 _0 {9 A7 y
O(h)=1/p(h)0 _, o; S& Z& Y' U7 H% H% n8 ~, L+ {
O(a)=1/[P(d)+p(a)]
- O/ R$ c# X' J8 [4 H9 X四、平半球盘的计算描述
7 `$ q" L- ^6 W/ I# t" }" g2 S这个稍复杂一点
/ H5 `! K: W& A接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
) _& b5 M r. E, e7 O2 J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:4 N6 f0 R9 ]( k v8 s
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生+ O+ Y! M& r8 V" S
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生) [" J+ R# v$ W% d, d {9 K
{0, 即上面所述的A(a)结果发生
' w0 {( j4 K! f1 E H3 q以及' |1 ^% M9 t* i% h( o p
{1/2×b(a) , 即上面所述的A(d)结果发生- n3 C# \# V# d! x' B. ^7 O
R(2)={0, 即上面所述的A(h)结果发生% n* Z9 t& g( ?' y# t- ?: q
{O(a)*b(a), 即上面所述的A(a)结果发生
& `. D u7 b9 `9 T5 @. r, r投注主客的期望回报总数分别为
! w6 w G) C0 f& I6 TE[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))
: Y! H5 a* p; T8 P! j% T+ vE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]
4 V$ I, D# F& d/ F和上面计算过程相似,得出:6 c9 ?/ K3 ^, ?) T p: I5 `
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)3 q& P! H5 W- S/ X7 [
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
2 M) d2 Z# t/ B: S, q* QO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=10 }2 C& D" l8 F% |0 p
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))0 P6 f6 F, T" J; k+ z
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)0 v1 r/ o4 v+ |) ?
1/2×P(d)+P(a)*O(a)=1
6 u' d9 P0 w- {O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)3 l& \0 j9 q+ l: Y& h9 m
同样主队让平半就分别是* t& i) Y t1 z; j$ S) f. l& P* e" _. B
O(h)=(1-P(d)/2)/P(h)% R% {! h9 M$ h( e j7 w
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
" o' @" X9 ?/ f/ w1 \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)
. i" I/ @7 r0 p% d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
: ~& U4 Z9 ~! _3 L5 R9 nB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
& z5 e( D& ^" ^/ O+ T: ?B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}) |4 B; O/ j/ f5 V0 @9 L
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 y' Y5 j9 N: d
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:. K ^, d9 D7 S7 n/ H" U* F/ I
{b(h)*O(h) , 即上面所述的B(d)结果发生+ M {0 B0 ?! P: J# | U
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
" K) @& d$ ~% _{0 , 即上面所述的B(a)结果发生" ~ @4 T4 y. @' h! k
以及4 R" t2 x7 g- [
{b(a) , 即上面所述的B(d)结果发生* y/ E( U. f1 w
R(2)={0, 即上面所述的B(h)结果发生" Y$ L* G: M( G# }2 \2 Y
{O(a)*b(a),即上面所述的B(a)结果发生' M2 u: c; ]% G' z) `$ Y4 T( f
投注主客的期望回报总数分别为
0 ~3 m: e; }( w6 F# j; V5 DE[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)]8 e. v! d! Q. @, Q
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 D# @) d% D& c! r假设实际投注回报与期望投注回报相等
' n- x# |3 g$ jE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
' `# A# Q3 O; A; hP(h)*O(h)+P(h1)-P(h1)*O(h)=1
% z* i1 C" o& i) Y. V4 H" ~ fO(h)*(P(h)-P(h1))=1-P(h1)
& E% [( Z* b+ A" IO(h)=(1-P(h1))/(P(h)-P(h1))& l8 a# ^) k1 Q4 {2 e/ i
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a) \' [$ H( t5 m- g0 o
P(h1)+O(a)-P(h)*O(a)=1
; G4 w5 c/ T0 d& L$ T" k% i% n" {% aO(a)*(1-P(h))=1-P(h1)
2 F- H& D' N6 z" s! k# d. MO(a)=(1-P(h1))/(1-P(h))5 S# z+ G$ t6 E* U0 s) m3 G/ @* D
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。% ~7 y7 V$ [# ?% i0 O, E
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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