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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。
" ]% L6 H! ^3 q1 x0 x& F ] I# m那么,平局、主胜、客胜就有以下表达式:! ~- E- y3 ?' p! k8 T$ L( u
A(d) = {W(ij)|i=j, i∈N, j∈N}: H. p- N( Q1 B& `
A(h) = {W(ij)|i>j, i∈N, j∈N}
/ s0 [) c; ~1 A. c( SA(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]:
. `" g6 p# y5 F& d/ P$ a% o. @" F2 [P(i)=P(Ai), i∈{0, 1, 2}$ K0 L. l4 Y/ m# ~2 C9 E
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 Y. ]% Y/ D: }0 t( F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:
' e$ f% T) |9 T! z{b(h) , 即上面所述的A(d)结果发生
, ^* s( _7 k, f# W2 m! f gR(1)={O(h)*b(h),即上面所述的A(h)结果发生+ F) L7 {8 J& X. X. Q8 ?- |- U
{0 , 即上面所述的A(a)结果发生
6 i" L7 H3 t% K4 [* p以及
- O6 l* R# O& Y8 N{b(a) , 即上面所述的A(d)结果发生
3 P: P1 ]1 T' L1 |7 e4 HR(2)={0, 即上面所述的A(h)结果发生
N2 F, p$ h4 ]7 _$ l4 |' T7 g{O(a)*b(a),即上面所述的A(a)结果发生
y m B- d. Y/ I/ ?3 T9 E! S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
( E9 T, v4 V6 z0 u# a那么投注主客的期望回报总数分别为
" ^% Y# Z. p n9 m5 WE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]" {+ H1 m- ]) Q! q: G0 k! ~: r3 h
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]! i$ ?, M$ X) S
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. Q0 `1 g) b2 r9 o) r
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
) }$ b ?5 t O6 N q1 ZP(d)+p(h)O(h)=1
" ?8 n" c/ y( w# x oO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式0 n8 o% r4 Y/ |/ p2 F
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
$ ^, Z. u2 [, `; qP(d)+p(a)O(a)=1
- b5 G1 O* v) T4 IO(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 C- @+ f- q# [( k" w8 J
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6 D' x- a$ i( X. n( ^, x4 x
三、半球盘的计算描述
0 }( g" K4 S$ f* ~$ W接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)4 R8 [/ M& k" Y% h. ?
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 O: r+ K$ R' a+ g8 o
{O(h)*b(h),即上面所述的A(d)结果发生7 y( P n* P7 M, F* ^
R(1)={O(h)*b(h),即上面所述的A(h)结果发生+ B" z/ R' \! X4 e- l# k9 i
{0 , 即上面所述的A(a)结果发生
' P) E3 [ l- Z9 s: Y$ ~以及4 r0 e. j. H" v
{0 , 即上面所述的A(d)结果发生
- @, [# m# r/ w5 V) O, k$ x; `R(2)={0, 即上面所述的A(h)结果发生
4 i0 W+ f4 m: ?( O* |" `* p{O(a)*b(a),即上面所述的A(a)结果发生# N Y' u- D9 K M, ` B
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
/ @( m0 k) G1 x) D投注主客的期望回报总数分别为
9 q. n% d9 ?6 V+ ?" LE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]- g4 g6 i+ F( ]( l
E[R(2)]=P(a)*O(a)*b(a)3 i0 N" u& k- a
假设实际投注回报与期望投注回报相等' T# _( U. t1 ]+ b
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)1 q" f5 O1 w. A4 ?! `# c& Z- I5 d
O(h)*[P(d)+p(h)]=1( ]9 Q! a- Y8 M0 q
O(h)=1/[P(d)+p(h)]1 `: T+ o( W* n9 z
E[R(2)]=P(a)*O(a)*b(a)=b(a)
7 S: J1 d9 X( r! q9 ~. PP(a)*O(a)=1; |+ Q' l, E9 J. E
O(a)=1/P(a)2 G; J. w7 G5 A9 u9 ?, Q
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率4 l, k4 j0 V0 v8 @6 x/ w/ p
O(h)=1/p(h), y ~+ ?' |, o( F7 y7 ?
O(a)=1/[P(d)+p(a)]
0 v, J% R8 g- j, y* F四、平半球盘的计算描述& r5 n4 K' V" J$ j% E: x. l
这个稍复杂一点
' a) N3 T Y6 e* [5 p接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)) `; N2 m U8 d6 N. ?! b6 l
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:- j: L* B9 b) r5 j0 J
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生5 [" z1 I! [0 {8 ~
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
6 f# j& C! o' d/ _{0, 即上面所述的A(a)结果发生
& F& W( ^6 Y3 `3 p y' H以及
0 a Y" L' U& a{1/2×b(a) , 即上面所述的A(d)结果发生2 B$ |9 `. I5 F* ?' Q! h1 N
R(2)={0, 即上面所述的A(h)结果发生
5 o" P1 j L' B' Y1 T{O(a)*b(a), 即上面所述的A(a)结果发生
/ t, T1 p E2 v5 S G投注主客的期望回报总数分别为0 P! I+ j5 h) |2 G( }3 r, T5 T
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))
( z' b2 A" ^# G, E5 ^6 m, @' g, EE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]7 B% o: j# B, n. P
和上面计算过程相似,得出:0 P- d& j+ E" i. _8 N; [
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)4 k3 ?7 m* L, T- u- {7 Z
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
2 k2 _! [! X! T( A% O% ^9 eO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
2 K: d7 K$ P+ U* l7 b0 m+ P( bO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h)). V; R, q$ S8 C/ R
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)# p+ d- m( c* L
1/2×P(d)+P(a)*O(a)=1. C; @/ H# G* O, P7 A; i
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
' B S- `1 c6 f/ ^( s+ G同样主队让平半就分别是4 P2 `$ b* b/ w7 z/ [* S' D
O(h)=(1-P(d)/2)/P(h)
{. c& R4 @! l$ E1 X$ D( FO(a)=(1-P(d)/2)/(P(d)/2+P(a))2 ^4 d6 t2 U& q& c# L
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)! g7 P% g: T& y. r5 h+ w
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4 \6 L& o7 \) @: F6 c+ o
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
0 A$ P" p" \9 R# {2 ?B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
I1 u% [7 z3 k9 E* B) y' dB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数" O: i& ^& @/ w ^ 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:- b0 ?5 H% ?5 f# S/ M: V
{b(h)*O(h) , 即上面所述的B(d)结果发生
4 D' w; n5 M; P( }% j0 |R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
* }# c4 S* s9 n) k6 K{0 , 即上面所述的B(a)结果发生
. c6 s7 y1 i8 J+ i8 D以及
5 O5 X( }- r/ j! s. U. D; K{b(a) , 即上面所述的B(d)结果发生2 x- v8 S) _4 H' G( I. `
R(2)={0, 即上面所述的B(h)结果发生
. M& J3 p4 G* _, t& C{O(a)*b(a),即上面所述的B(a)结果发生
7 x! c+ F5 L e' W5 N h3 G( M投注主客的期望回报总数分别为1 S; }# v2 I1 O1 n4 N
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)]
% e& N0 j3 s8 p: iE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))6 g( D/ A1 g$ y2 |+ v
假设实际投注回报与期望投注回报相等1 \# c. [5 m9 A0 Q
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
# i8 R. O$ m0 j7 G2 m$ ?P(h)*O(h)+P(h1)-P(h1)*O(h)=1; n$ G4 P. {6 x
O(h)*(P(h)-P(h1))=1-P(h1)0 @3 w# [! n- \) L; i* R
O(h)=(1-P(h1))/(P(h)-P(h1))* o0 y& U! t3 g; e
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
% b# }8 D$ Z7 W k z5 z# j. @6 QP(h1)+O(a)-P(h)*O(a)=1
& z2 d/ X8 u) A" A( a: WO(a)*(1-P(h))=1-P(h1)
! x% q P$ n8 h* k. bO(a)=(1-P(h1))/(1-P(h))* }" e# \2 F5 k/ o8 P' _
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。
; j/ M3 W% m6 J4 j0 Q- s6 x9 s% D- N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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