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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。
7 p% Z& G4 z# ]: o( y6 {那么,平局、主胜、客胜就有以下表达式:6 X+ z! h" B( H* A
A(d) = {W(ij)|i=j, i∈N, j∈N}
' \' l7 P R" X, IA(h) = {W(ij)|i>j, i∈N, j∈N}
% k3 m K/ j! N4 x4 rA(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 \7 i& e4 ?7 L$ x% m( s# e# \
P(i)=P(Ai), i∈{0, 1, 2}+ }* w: J- F! D( t$ `8 V$ O
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)* Q6 l7 y1 b5 `+ p- I/ C9 N
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:! `" p1 R& H" ]) y/ q& k: E; F
{b(h) , 即上面所述的A(d)结果发生+ [4 G* I2 w5 d
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
, E, x- l! J( H4 }( V{0 , 即上面所述的A(a)结果发生
8 Q u# i) c/ A0 ~3 k以及
6 Q! O; W* X6 M. J{b(a) , 即上面所述的A(d)结果发生
7 A6 P3 `. e. j* WR(2)={0, 即上面所述的A(h)结果发生$ R# R7 ^: p. }' D, [4 [% l4 T
{O(a)*b(a),即上面所述的A(a)结果发生# x+ D% e# G0 q5 N
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# o$ {6 j! J( L+ U6 i( S9 s0 h) C
那么投注主客的期望回报总数分别为& p" H0 H$ Q8 y
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]2 @' Z; \1 f5 r, p; \
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
7 I, [& G1 w7 W# L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3 h. [& c: ?2 c) T+ G+ \
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)& K0 B/ S Z3 N: S! h) W8 p3 N
P(d)+p(h)O(h)=1( l4 U) L/ ^- `- J3 f
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( H1 E! c. }# E+ i+ x5 T9 r
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)+ T/ b2 n4 N4 V8 V9 ]( b# }
P(d)+p(a)O(a)=1
" k# e3 U8 O( ]% p, {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9 @* X$ I( J- k( t( e
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
. F! W& @* L4 ]) ]5 [三、半球盘的计算描述
; O3 g/ w/ ~! b9 L接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
% [ Q1 \9 V/ F2 e5 m, Q. E# E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:1 r G* x, K Y$ |! @
{O(h)*b(h),即上面所述的A(d)结果发生
$ }- L7 P& b+ W; ~% d* b1 bR(1)={O(h)*b(h),即上面所述的A(h)结果发生
6 e2 e1 c; h( v7 o3 S2 P. C7 D8 j{0 , 即上面所述的A(a)结果发生' z0 Q% x9 n, [4 i- t
以及- a' @3 H, y' t. p9 M5 ]: C4 h
{0 , 即上面所述的A(d)结果发生% x: t5 Q7 a* n. r! q( I
R(2)={0, 即上面所述的A(h)结果发生0 ~1 I- c% _+ R# ]( }. P
{O(a)*b(a),即上面所述的A(a)结果发生
4 k( V+ P" ~, h! O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, L* n X c5 h2 Z投注主客的期望回报总数分别为, K; Q# i' Q. C1 }. j+ |* y
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]# _$ `8 A) B# Q8 `, ?- |
E[R(2)]=P(a)*O(a)*b(a)- k P. A& v) N; Q5 p G) c/ w
假设实际投注回报与期望投注回报相等
$ q3 g2 D! w4 K& |. G, jE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
, w$ }+ E, U. q7 X6 R K$ lO(h)*[P(d)+p(h)]=1
: ?" I( r/ a! p7 t9 d: jO(h)=1/[P(d)+p(h)]7 t% i2 w- q- ~ Q7 r
E[R(2)]=P(a)*O(a)*b(a)=b(a)' U7 l, h$ D& P2 E4 J
P(a)*O(a)=1! f4 b8 j$ S+ B( M: `
O(a)=1/P(a); ]1 L) Y0 Y6 K
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
0 E8 z8 I* k7 A: O# iO(h)=1/p(h)
3 V# a' p: w9 m; Q9 XO(a)=1/[P(d)+p(a)]9 ], S) }3 j( s7 N0 n/ C
四、平半球盘的计算描述( W1 o! E& W; U: f; Z, y
这个稍复杂一点
' S& \' C+ d$ c7 K' f& ~( k接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)+ X7 r# C7 A) P& 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:
9 F1 D" C& |5 G8 {{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生' |2 C+ y9 ]# _. G# V( l$ E8 {, ]
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
% d) |& O4 q4 X{0, 即上面所述的A(a)结果发生
& `7 ^& q/ v% c& |以及
) |1 f0 w: ]: y; R{1/2×b(a) , 即上面所述的A(d)结果发生
2 N3 i/ e5 D2 t1 PR(2)={0, 即上面所述的A(h)结果发生0 k+ H8 l$ x- o( E# C' k6 X
{O(a)*b(a), 即上面所述的A(a)结果发生
! v" H. w& u: M投注主客的期望回报总数分别为0 D' M; W3 j/ A$ k( _. X
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))/ h& v/ y9 N+ y, M4 v
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)]
- ?9 F' K m/ Q& j8 j. R和上面计算过程相似,得出:' j0 T2 z8 N/ E- T* c( D
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h), D* A3 l, }% C0 y$ l! V! O" \, @
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1% Q# K) ?1 d) m$ E& ?/ A
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
' j2 T- ]+ W% dO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))( P3 y4 w4 t* @- }* `% @* O7 R( o
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)6 _ }% f% G$ O0 O8 t
1/2×P(d)+P(a)*O(a)=1, o- W, ]+ R# N' [% a+ |$ Y
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)3 _- k3 \2 [+ E5 V
同样主队让平半就分别是% x1 ]! f! X; @
O(h)=(1-P(d)/2)/P(h)4 T( q7 L- v/ j
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
) I6 h8 O: _! I) i0 U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)5 E0 z( l9 v5 V7 {' I3 r9 N
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: Z' R: |& J; { o2 D1 D7 d
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
: D1 L x- v! z# k# R0 N- `! YB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}2 v. O$ `5 _' C+ @1 h1 {. M
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
8 V3 P' v9 n& q2 v- ^) e, X/ A" w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:
5 r) z p5 g# r4 }{b(h)*O(h) , 即上面所述的B(d)结果发生. j* p$ [* N9 k3 U( l: h$ U# s" P
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
* \" d7 R+ [! d: T0 J3 Y) m6 M{0 , 即上面所述的B(a)结果发生
& J1 R3 I* |! p% {以及. G- B" l C. U: U( @. K$ l1 i
{b(a) , 即上面所述的B(d)结果发生
- Y: Y& y! @% b% d: t" t' z# UR(2)={0, 即上面所述的B(h)结果发生
4 d* J8 Q' x# \, O: T# S# j{O(a)*b(a),即上面所述的B(a)结果发生
, C1 }$ @, |, ~投注主客的期望回报总数分别为4 _ M) o5 T" y0 I8 c
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)]& f, |) D5 [3 F
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 b/ s k, B5 y* G4 Z; N假设实际投注回报与期望投注回报相等) Y4 f; k; ]# O" f$ Y
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)+ ]# p0 \) }. V# [$ j
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
2 m1 a& `* y: YO(h)*(P(h)-P(h1))=1-P(h1)
* G+ |! U( G& U# SO(h)=(1-P(h1))/(P(h)-P(h1))
! J- s0 o" L3 L$ B# dE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)7 `& j/ r7 a" s& d' e0 @. K
P(h1)+O(a)-P(h)*O(a)=1- O, V8 k0 X3 f# s a* \, k
O(a)*(1-P(h))=1-P(h1); a- A7 X( y" G4 X9 q4 y9 J
O(a)=(1-P(h1))/(1-P(h))
+ @+ ]( E* P7 q5 B9 a0 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。% v- f* R" G! O2 x: E5 c
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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