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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。
+ {( N9 ]' D% E" Y" p# N z那么,平局、主胜、客胜就有以下表达式:
( m [+ W7 H1 IA(d) = {W(ij)|i=j, i∈N, j∈N}
. }/ j; F. f1 j5 E4 l$ f8 @9 kA(h) = {W(ij)|i>j, i∈N, j∈N}
$ ~ ]9 c6 g) i& mA(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]:9 A" d! C0 ]$ {5 @/ _& b, T
P(i)=P(Ai), i∈{0, 1, 2}( s) d8 _: y( n9 h
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)8 B4 ^5 b6 a. c
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:
# V9 Z: u5 n% {8 E+ s' o0 p{b(h) , 即上面所述的A(d)结果发生8 ~$ ] [) _" ~- T& F7 t
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
/ _8 P" I% B/ h: T9 Q{0 , 即上面所述的A(a)结果发生
4 v3 {( ^( m* d9 u; {以及
; o0 _- L) f9 B% V# i{b(a) , 即上面所述的A(d)结果发生5 U" y. [3 R# Y6 F& t ^
R(2)={0, 即上面所述的A(h)结果发生
+ z, h& l% t: u+ A* k9 ]6 p8 f2 R{O(a)*b(a),即上面所述的A(a)结果发生: X# u- S2 w! m& Q- v
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
& I# k' k5 O3 l% U* m那么投注主客的期望回报总数分别为6 [( ^( v. D: i. ?4 F- i9 r' Y
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
9 K& k! ?' G1 q2 lE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]) J" \, R8 }7 F: X4 x
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. N1 r7 _6 k
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
- O& R6 t. w# d* HP(d)+p(h)O(h)=1
+ W! e2 U0 F DO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式8 n! r* L( C3 _2 O
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a). s f8 w% P: ^6 _: l
P(d)+p(a)O(a)=1: h4 D( q- F T3 a& Z
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
. k: r1 M7 o& c+ ~! O) c4 b& a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/ O: t- p+ Z5 ^5 H7 G5 W( b4 m
三、半球盘的计算描述
, u! I! A8 n' |8 @3 e接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况), g1 |3 S4 C" u: _5 E/ p9 }
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 {5 t1 ^5 Z$ O1 h( J2 [$ |{O(h)*b(h),即上面所述的A(d)结果发生5 E* D- a% b3 d& ?7 s
R(1)={O(h)*b(h),即上面所述的A(h)结果发生4 \* R* Y5 Y0 K- o, p9 I1 j; ]
{0 , 即上面所述的A(a)结果发生
+ _6 u8 c3 j* @4 ^以及% ^! Y4 A/ Q$ V1 l
{0 , 即上面所述的A(d)结果发生
1 q8 G9 W) [# N! S0 e/ ER(2)={0, 即上面所述的A(h)结果发生) f3 ?' s! e2 j8 W! n( @# y
{O(a)*b(a),即上面所述的A(a)结果发生
4 J, V0 I$ \ _. _ I6 z8 c3 i如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率* n3 ^( g* c, L0 Q7 p
投注主客的期望回报总数分别为# L, u# {3 D2 n3 v9 [
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
# [8 I: c9 g! P: [4 d1 t4 C/ O1 z% {9 jE[R(2)]=P(a)*O(a)*b(a)
% f3 t- s! @/ i0 e& ~8 Y$ _8 @假设实际投注回报与期望投注回报相等
0 d/ |6 a% g- }5 _ e4 cE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
3 a7 A0 w& w) @O(h)*[P(d)+p(h)]=1
' p, O6 s2 p/ s- ~! B8 AO(h)=1/[P(d)+p(h)]
5 r1 j1 Y3 e8 _" YE[R(2)]=P(a)*O(a)*b(a)=b(a)
2 }* ?( G' Z. j9 m9 W! GP(a)*O(a)=1
9 g R3 i: u+ J; Y: MO(a)=1/P(a)2 I9 v$ G" k( ~ d# i* N! A- s4 _; D9 J
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
" h4 S8 B7 t- r6 t( u* B6 w bO(h)=1/p(h)* o% F; W9 k! m* a2 Q9 M) ?6 _
O(a)=1/[P(d)+p(a)]4 L4 \& e. G$ t+ p- J/ s5 @ c
四、平半球盘的计算描述, x& b, h y' Z f
这个稍复杂一点" [( p3 v3 E$ U H& `& F
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)* z, O! q0 E S; h i9 [( n1 ^
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:; g6 L: Z5 h. V( W4 u" d
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生1 u' ?* G0 v; R; O/ v
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
1 l* D9 u4 c6 A! ~( {$ @{0, 即上面所述的A(a)结果发生
) v; ^( D7 F( F& g! S以及
% @& ]( x* f, `& w, |: Z{1/2×b(a) , 即上面所述的A(d)结果发生- ~+ ?" g' z0 f R% k, `
R(2)={0, 即上面所述的A(h)结果发生 W# h1 m2 Z5 r* e
{O(a)*b(a), 即上面所述的A(a)结果发生
& s! T9 A* N- e8 L投注主客的期望回报总数分别为
8 w4 O* w% \8 L+ j4 hE[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))
- v _2 m) g7 ]& rE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]
# H/ G& s- K" v和上面计算过程相似,得出:& N2 v `' z; J0 t$ U D
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
2 V F; ^1 r9 J5 Z+ g# ^0 `P(d)×{[O(h)+1]/2}+P(h)×O(h)=1! y" ^* `6 J3 o. B% x- X
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
" D- {7 f6 E( ^3 L# LO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))! X; x8 m- w2 ^8 T9 j" z
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a): v9 R$ o# t# z- r2 y& i, @
1/2×P(d)+P(a)*O(a)=1, D! u3 R, r/ m- I% ~4 z( E+ [
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
- d5 e6 q/ |( b" X6 I6 M$ T同样主队让平半就分别是' \7 ^' H5 P; B) W; e( c
O(h)=(1-P(d)/2)/P(h)
+ X' a' o! W/ `% lO(a)=(1-P(d)/2)/(P(d)/2+P(a))* h9 y' N8 f" m* a
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)
0 g. I! x) R! V! C; 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
: B/ X! P l- p0 n6 J( B* i2 q' TB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
4 U; O8 s' m; n; t+ k, {& h' ]B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
u: D2 g6 f8 W! Z6 UB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数, E3 j) W5 V! v: E. u
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:
1 C; n; w* V, U& \; k; @{b(h)*O(h) , 即上面所述的B(d)结果发生, G: U8 h; v( J$ N0 ^+ r/ ~# t# `
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
9 {+ d) }% {2 U8 H* ^- n+ U{0 , 即上面所述的B(a)结果发生, g/ q# B5 F, w* A+ j, `- l) a/ j- ?
以及
' |! F }- }* K& Q{b(a) , 即上面所述的B(d)结果发生1 p, N5 H6 A/ T5 q
R(2)={0, 即上面所述的B(h)结果发生" y6 {. m! x9 J6 q. ?5 h, g- O
{O(a)*b(a),即上面所述的B(a)结果发生
) _. j0 P9 n8 Q, B投注主客的期望回报总数分别为% }% ?6 t e ?, S! M
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)]
: T8 T$ {7 y5 b9 o# s- X/ pE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))( e0 T& `# N4 O
假设实际投注回报与期望投注回报相等) a/ v4 r" n( q( ~
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
# z3 E4 M+ S0 T* B0 cP(h)*O(h)+P(h1)-P(h1)*O(h)=1. o4 K) S* S. v( N
O(h)*(P(h)-P(h1))=1-P(h1)$ A0 \0 P' M$ ]5 K: ~
O(h)=(1-P(h1))/(P(h)-P(h1))7 j! n5 p; y+ [. V! c5 O
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)2 A: O* n9 b+ [4 N9 Y
P(h1)+O(a)-P(h)*O(a)=12 n4 [( W/ M# v% v! ~
O(a)*(1-P(h))=1-P(h1)- L1 l5 i( i% z/ }4 ~' v" Z
O(a)=(1-P(h1))/(1-P(h))
9 T# m7 Q+ f4 R- y" ^8 Y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。! R |" ~1 o# O n. \/ R
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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