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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。
, v( f! N( R# _' x那么,平局、主胜、客胜就有以下表达式:1 B, q' L; q& E2 u" s! Q0 h
A(d) = {W(ij)|i=j, i∈N, j∈N}
0 R4 e- ?% j9 C/ F1 ]- J- ~" ]A(h) = {W(ij)|i>j, i∈N, j∈N}
+ t8 v* n- v- v; n& d6 HA(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]:- U' U% |/ i$ ^% l8 s- B) x( l
P(i)=P(Ai), i∈{0, 1, 2}
8 c1 R" ?8 Y, f- L! o0 m) p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)* O3 \! Z ^1 o# T: ^3 J0 c$ y# K
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:' d5 \. o r: A2 q
{b(h) , 即上面所述的A(d)结果发生+ M! s$ u1 s! b& w9 M7 h
R(1)={O(h)*b(h),即上面所述的A(h)结果发生5 a) g1 l1 D9 @# I% `3 g
{0 , 即上面所述的A(a)结果发生) P, w, y8 d- r
以及1 x! r4 b7 K, O: i
{b(a) , 即上面所述的A(d)结果发生
9 P6 Y5 G% t. k0 |9 JR(2)={0, 即上面所述的A(h)结果发生
. e& z3 Z2 q: G8 g' ?+ C{O(a)*b(a),即上面所述的A(a)结果发生
4 K$ V8 @- B/ q; q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
" Z9 Y7 m# e, t. h7 J4 B& O% t那么投注主客的期望回报总数分别为# e+ M7 u: n! j( ]
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
* o6 W% ? R1 Q- w aE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]: f, M/ k, c8 A* w6 H2 c( J5 I
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$ A! y/ n/ Z( L3 F% i1 P
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
4 a7 f* B% R; n |5 Q" c4 g7 iP(d)+p(h)O(h)=1" T2 g; D; H& a: i* k: | a
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9 S4 |0 x2 O# y2 U5 r2 r. S
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
* i5 q. o, c- ?4 n) u2 r7 _P(d)+p(a)O(a)=1* y) N; F9 V0 p8 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' [2 V) v4 E3 f7 n
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; s- {& p! w) G' {: g: y, v; r
三、半球盘的计算描述
% G+ R7 C7 H1 J' h) J7 W5 I接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
) h6 X: o& D2 m& \( r& f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:( q1 X2 a) K d
{O(h)*b(h),即上面所述的A(d)结果发生! x' z# Y, b$ ^$ Q
R(1)={O(h)*b(h),即上面所述的A(h)结果发生1 ^, K! |# s+ `! Q
{0 , 即上面所述的A(a)结果发生1 s5 ?% `* m4 s9 c+ z- X" @( _
以及5 H8 I; p6 M( Q
{0 , 即上面所述的A(d)结果发生
. v& G# d' ~7 _" }, B7 i: y9 zR(2)={0, 即上面所述的A(h)结果发生2 Y5 ?# K% T8 [
{O(a)*b(a),即上面所述的A(a)结果发生
* X3 O6 t9 A) |( c如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率' I5 n! W. l6 T& v1 W/ }0 ?# Q# F
投注主客的期望回报总数分别为! I2 G, H, f1 e3 E1 H* U
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
! Q* f% n( g& I iE[R(2)]=P(a)*O(a)*b(a)' Q# }0 P" J) x7 U
假设实际投注回报与期望投注回报相等
! J$ C$ Y" p$ R3 m- n% a/ b- JE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
J; M* _& c5 b X0 ~O(h)*[P(d)+p(h)]=17 | m E% [9 e
O(h)=1/[P(d)+p(h)]% _+ N# n: K2 r$ t& a( ^% V
E[R(2)]=P(a)*O(a)*b(a)=b(a)& j7 m; r! Q( H
P(a)*O(a)=1
6 D5 I( z8 X, Y* @) @6 w g) m( x3 ?O(a)=1/P(a)/ X! j# I2 Z: \6 E* \! P
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
" V4 `% M* }: |& S8 ]O(h)=1/p(h)
. d! L& t( W/ }' J5 pO(a)=1/[P(d)+p(a)]
1 n# R% }3 p2 x四、平半球盘的计算描述
6 W+ s9 W; p. E( C8 s4 ]这个稍复杂一点
+ f1 [) f$ ]# ]接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
2 x5 J0 Q! o3 o) N/ [# T' W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:
; O1 f7 F+ h+ g. `+ M0 I* n& }, G{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生) d; b! h' ^. Z: @1 y( @7 K/ @' A: |- m
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生+ }$ V( G3 h! D, l6 j" G- W2 \6 B# i
{0, 即上面所述的A(a)结果发生
4 Z7 i0 c, u$ ~以及
i1 ]5 T8 |& M7 T8 k) f. b{1/2×b(a) , 即上面所述的A(d)结果发生. D# \' `1 E0 c* y
R(2)={0, 即上面所述的A(h)结果发生6 K8 U7 e' } i, x& ]# N8 b$ l) ^
{O(a)*b(a), 即上面所述的A(a)结果发生9 ]2 C+ `( i0 s$ N- `! l$ d4 H
投注主客的期望回报总数分别为
% W3 r2 W" \4 YE[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)), n4 W a9 z! ^, M( r& U
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)]- [/ `; k7 T) ^9 J* M
和上面计算过程相似,得出:
$ w9 E: O. B. T" f4 ^2 B$ @E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)4 m3 i( w: @5 H1 `- l' h' l
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1 s8 i' f2 |! W9 @* P
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
! Y7 [3 u$ |) _) x9 r1 [$ \; l; IO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))! Z7 Y7 [1 ?0 w) F1 C/ ?
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)( i+ B: X* s* H3 u4 _0 x
1/2×P(d)+P(a)*O(a)=1) O% L( [1 w( p3 K& R- T
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)) w6 O. i. x+ s3 j, d
同样主队让平半就分别是
4 ^; j/ \+ P1 z1 W# e3 ?: FO(h)=(1-P(d)/2)/P(h)
. Y P. j, I2 oO(a)=(1-P(d)/2)/(P(d)/2+P(a)); R U; W3 K% x$ O' z8 `
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)8 L& ?2 r' Z# J4 G
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, [. o2 V& k: l. ^
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}2 y0 P3 h& m0 [
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
' t) U' _; w" l% L6 p7 cB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数! G; k* W+ n+ [, f/ h" z
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& `( {6 {. i) s' J: ?/ H{b(h)*O(h) , 即上面所述的B(d)结果发生! F0 x$ l& C9 f! a" g% ^
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生4 ?' G. o7 ]1 u0 \+ i) O
{0 , 即上面所述的B(a)结果发生. f0 ^' C$ u2 U, m$ u5 O+ \. q$ _+ H+ D
以及
. o3 {! d) y4 K+ `& l$ c{b(a) , 即上面所述的B(d)结果发生
" t: G& [) e3 N; ~6 j5 ^3 jR(2)={0, 即上面所述的B(h)结果发生& K- k5 D/ B% M: |' V0 |1 k
{O(a)*b(a),即上面所述的B(a)结果发生
( R8 ^" w* v+ O% _0 X* E投注主客的期望回报总数分别为
' I/ d7 s5 y; BE[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)]0 {) X3 W. d: e7 [8 A7 R5 M
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 p" x# i2 X, v3 i0 [
假设实际投注回报与期望投注回报相等
- p/ V$ |4 D' y3 y% y5 vE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
/ P: {; l& }" JP(h)*O(h)+P(h1)-P(h1)*O(h)=1
* k: i2 w1 _, c; e! |( {2 V5 Q; fO(h)*(P(h)-P(h1))=1-P(h1)
! c' t. _* `* ?$ {( C& Y4 jO(h)=(1-P(h1))/(P(h)-P(h1))3 Y, ~- }# A; Z; C
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
( L7 r/ V/ E0 G P# JP(h1)+O(a)-P(h)*O(a)=1
9 i, O: o# V1 nO(a)*(1-P(h))=1-P(h1): Z6 G9 f/ v2 [9 T# d6 ?
O(a)=(1-P(h1))/(1-P(h))
2 h- P9 \9 g+ M' u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。$ |1 O/ g8 i+ l
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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