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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。
5 q) Z, R" ?/ t1 U0 P1 V那么,平局、主胜、客胜就有以下表达式:, @7 h Q& K% [" G% h# n& w
A(d) = {W(ij)|i=j, i∈N, j∈N}- R4 |& a7 E# R7 D, B4 @3 j$ A/ W1 ]
A(h) = {W(ij)|i>j, i∈N, j∈N}, V0 \% K% C. H
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]:
. E, Q) X" O. f" v8 {, p/ g2 lP(i)=P(Ai), i∈{0, 1, 2}
9 x" _! Y2 R" [' u4 K p9 N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)4 ?+ ?) l' @! E# X
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 y, ]' ]- O" u1 G{b(h) , 即上面所述的A(d)结果发生
7 H; f% h% i3 p/ j/ _4 [R(1)={O(h)*b(h),即上面所述的A(h)结果发生5 l9 P- y u" j/ f
{0 , 即上面所述的A(a)结果发生% ^4 ?" u& e8 z
以及
( x1 s$ ]+ f; a. m I{b(a) , 即上面所述的A(d)结果发生
& x$ k' j9 U6 lR(2)={0, 即上面所述的A(h)结果发生3 H! l/ f1 r+ d3 q- B- P* w
{O(a)*b(a),即上面所述的A(a)结果发生
% X. a- B* b4 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
- j" Z2 ^5 G& @; O5 p那么投注主客的期望回报总数分别为( F+ S' Q* W8 a$ W& Z D
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
' L( c+ a z# { h; c+ YE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]. n2 D- x: i J+ i) T( W" U
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% S$ B- ~) a8 U) w6 ?$ u3 ?
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
4 D) Q& K' a8 hP(d)+p(h)O(h)=1- f7 D: Q9 ~: V0 Z8 ~
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) E2 L1 T5 U6 B* a, _/ P, q
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a); y! H9 x% [+ o5 i% w
P(d)+p(a)O(a)=1
0 r" y p& I& A. o. ?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 u! K( o: k* U
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 W2 J' W8 j7 a
三、半球盘的计算描述" G; X' a0 v* U- `% i: \. E! o
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
/ X# \0 j* @* v1 D2 |" ]7 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为:
3 ?8 c0 t* H7 N) l/ s# P. }& x( b3 p+ K5 |{O(h)*b(h),即上面所述的A(d)结果发生1 M- w% ^; ~" x3 Z6 [
R(1)={O(h)*b(h),即上面所述的A(h)结果发生! I; j3 q9 Z2 y( Z
{0 , 即上面所述的A(a)结果发生
2 ^2 a( e& q' j5 y以及
6 a D) j# b* p \" A# L{0 , 即上面所述的A(d)结果发生
% a: v& s, a; U& Y+ ~R(2)={0, 即上面所述的A(h)结果发生' I6 ~7 s: [0 b
{O(a)*b(a),即上面所述的A(a)结果发生
* R, ]9 O: f3 F0 @* p如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率$ n8 |7 w* J4 _( c* ~$ C# d0 y! O: [
投注主客的期望回报总数分别为
7 q1 p( {0 m1 C: d# wE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
* u1 X6 Z4 k& z# JE[R(2)]=P(a)*O(a)*b(a)
- _0 L i( w4 J7 u. I ?假设实际投注回报与期望投注回报相等1 K, s! \2 K, N; x' a* n7 w% G& S4 B4 E/ z
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
6 r5 Y; E' t7 `+ o OO(h)*[P(d)+p(h)]=1% l1 w" }& Z! @6 S
O(h)=1/[P(d)+p(h)]$ A3 n2 I3 b0 g+ J8 A0 o: n+ B
E[R(2)]=P(a)*O(a)*b(a)=b(a)& A' R5 d. j' F) a0 U
P(a)*O(a)=1
/ j u0 E; P" nO(a)=1/P(a)
1 z8 ^% F- W. K% m) u! }! ]同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率$ [( E, h8 a7 K2 f4 _% y7 N
O(h)=1/p(h)
* i/ a4 ~: v, k4 ?$ GO(a)=1/[P(d)+p(a)]& k2 v$ j2 k' |% W- ^7 x: Z; [ s# X
四、平半球盘的计算描述
3 U! G+ d5 b' L$ r# \这个稍复杂一点$ l9 l: M& \* @
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)+ K7 h0 } u, D5 L" D& U9 B
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:
7 m- Y( q/ b! ^; m+ `{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
* p; e6 m9 U. fR(1)={O(h)*b(h), 即上面所述的A(h)结果发生1 h9 D4 p) y' Q R
{0, 即上面所述的A(a)结果发生
6 w* w* @: v7 G7 k" \以及. e# u" K% [' z& \& T
{1/2×b(a) , 即上面所述的A(d)结果发生, t5 Y7 }' g P" k# Q% C
R(2)={0, 即上面所述的A(h)结果发生
4 }! p5 s; y- c, j7 w{O(a)*b(a), 即上面所述的A(a)结果发生2 [( @! W- [& ^. k* [" t. T
投注主客的期望回报总数分别为# ]; T5 f8 P/ J, Y9 w
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)): s( h) U! K4 S0 X9 F
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)]
5 G! Q3 z4 `; c% p' B9 t5 q1 h和上面计算过程相似,得出:; y3 O* v3 a+ N' ?7 p$ @6 X
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
- G7 s+ \% w* H9 {& ]4 m& XP(d)×{[O(h)+1]/2}+P(h)×O(h)=1: [/ Q5 u, C" @" s5 r6 i
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1" u) z7 O' V3 f
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
+ W. ]& K2 Q" c# l* kE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
! M2 [; [9 l# @" |1/2×P(d)+P(a)*O(a)=1
9 e3 K) y" T; j4 ?O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
6 R7 r! ~. l4 r/ H6 K同样主队让平半就分别是. G4 k6 B F. R$ X$ c2 ]
O(h)=(1-P(d)/2)/P(h)
+ I" R+ L0 w. oO(a)=(1-P(d)/2)/(P(d)/2+P(a))/ P g8 R* S0 f) C) w
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), P8 g. m+ u. ?8 J( @
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
0 C8 p' C3 @* GB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
# d) _4 \! [* @0 |/ D1 r) ]B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
( g% s) z) S6 EB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数, H' ]; F; p/ ^/ R& F. L6 Q
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:; b# l, Z/ z5 w, ]3 B
{b(h)*O(h) , 即上面所述的B(d)结果发生' S, r4 c; G9 P. s+ K& e. D' U
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生; l; J5 U1 V% M3 b3 u
{0 , 即上面所述的B(a)结果发生, ~) R# Q L3 C1 J' x
以及/ T! q# N% Z: |; }$ O
{b(a) , 即上面所述的B(d)结果发生" {3 s) @( F4 X8 t7 h
R(2)={0, 即上面所述的B(h)结果发生
/ _* `6 |% H. u/ s- F{O(a)*b(a),即上面所述的B(a)结果发生* R& d: c( c2 I2 f% q2 x
投注主客的期望回报总数分别为" U7 k- f$ `5 x/ l" f) h
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)]# B/ j3 O6 H1 G- F% I
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))8 W. m. B6 ]! F8 Q x
假设实际投注回报与期望投注回报相等6 i3 n! E. O# U* F
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
" E7 c- B4 ^" Q. L4 P& c2 xP(h)*O(h)+P(h1)-P(h1)*O(h)=1
- k0 N+ T* V) I2 Q5 K; W9 X0 O3 AO(h)*(P(h)-P(h1))=1-P(h1)
' u9 X5 }, Y7 |4 O( J+ v1 v1 xO(h)=(1-P(h1))/(P(h)-P(h1))
, J4 l( K, y6 yE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
* f" h( ~6 A+ Z: uP(h1)+O(a)-P(h)*O(a)=1
8 G1 V0 M) H) lO(a)*(1-P(h))=1-P(h1)
k ^! h Z# J& rO(a)=(1-P(h1))/(1-P(h))
+ e; F4 `4 w" o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。
4 o1 d' c' c8 _7 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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