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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。 W. T- b1 G# X" g: C# _
那么,平局、主胜、客胜就有以下表达式:: b# v+ e" F1 k J5 n! D
A(d) = {W(ij)|i=j, i∈N, j∈N}) f# N7 R: x! U5 j6 F9 B+ R+ t
A(h) = {W(ij)|i>j, i∈N, j∈N}; U9 O3 o8 p6 V% M; q: u( `
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]:
8 X/ Q9 R' F6 rP(i)=P(Ai), i∈{0, 1, 2}
! I0 D6 W1 {7 [. g' t& k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 @: h+ Y0 n# N( ^/ 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:0 X; W" _5 |7 ^# W; H$ G
{b(h) , 即上面所述的A(d)结果发生
, U n" X& o. Q* d3 p2 w# ^7 vR(1)={O(h)*b(h),即上面所述的A(h)结果发生+ |5 M4 f0 f7 A% b
{0 , 即上面所述的A(a)结果发生
3 ?! D1 Q7 d" q8 `1 a' G! c以及
- U7 O7 H- p& t5 D& k0 Q3 Y8 k{b(a) , 即上面所述的A(d)结果发生. Z6 h. A$ U a, r7 N
R(2)={0, 即上面所述的A(h)结果发生
7 u& R: |8 D9 Q3 Q/ D3 J{O(a)*b(a),即上面所述的A(a)结果发生
& E9 _; d8 c% w; v' C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+ T! ?& d }2 w: G, [& V
那么投注主客的期望回报总数分别为
8 l% [" B Z" F! k0 ^/ xE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
& I" H. o+ Y1 k9 hE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)], Z: e; L; p( C& u6 l+ 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. m" {' ^ T* G! g$ s
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
' Z( }: b. {4 X# B* @P(d)+p(h)O(h)=1! a& F8 i3 @( } T' R* 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
# U4 ~0 L7 [, a- [& SE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a), m, o7 d5 V$ W- ?% i+ d
P(d)+p(a)O(a)=1) X6 ~( u3 H- G: i1 l
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
/ s" N& Q8 i3 |2 P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
- W0 ]; E4 U& y8 R/ R三、半球盘的计算描述
6 c/ V; t3 J/ \! q接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)" b+ ]* s+ n6 F# o: c5 C
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:
$ f) Z X5 n" [) X3 f8 J9 l- X{O(h)*b(h),即上面所述的A(d)结果发生# a5 T+ d; ?: c" H, s
R(1)={O(h)*b(h),即上面所述的A(h)结果发生3 N A+ q6 j3 a
{0 , 即上面所述的A(a)结果发生9 K, d' k+ c v5 t: j
以及
+ Y6 \) l2 c( Y( c4 f' T3 P; o{0 , 即上面所述的A(d)结果发生& {: V+ ]3 ?' M6 c+ x, W. r2 D x
R(2)={0, 即上面所述的A(h)结果发生
8 r9 q+ b, z) `& C" B# B! n{O(a)*b(a),即上面所述的A(a)结果发生
, p. O3 s% _# O+ m) 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
( j5 x) H: U+ P; J投注主客的期望回报总数分别为
$ M# D, F- p% e8 cE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]5 J/ {2 W& |- S3 W( q k, U2 l
E[R(2)]=P(a)*O(a)*b(a)% {/ d J& |) h2 n
假设实际投注回报与期望投注回报相等, X% U! |! |. o t
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)+ f, H. F/ x9 V* j# ^
O(h)*[P(d)+p(h)]=1
0 M9 T2 ]* V7 B. K5 ]8 j4 a2 DO(h)=1/[P(d)+p(h)]
& e; X4 w7 W) Y* E7 OE[R(2)]=P(a)*O(a)*b(a)=b(a)8 ` R4 I6 s1 H! |5 ?9 P1 `
P(a)*O(a)=1
, V2 K1 D9 Q: p5 ^4 e; f0 UO(a)=1/P(a)
9 t2 Q$ y5 p$ t& y9 A* h同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
, f( V7 x3 [% a# a/ XO(h)=1/p(h)
8 m5 p/ u+ \- @O(a)=1/[P(d)+p(a)]& d& z/ c% _$ Q
四、平半球盘的计算描述/ \# t+ {& h% P: ^# h1 x0 V E
这个稍复杂一点
( A# ~) S8 U7 e( m2 \5 _接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
" ] [ x1 A- k. I! _7 p P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:
* y: b- S- E3 v7 {{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生, u, t( x- x$ N2 }6 Q- x' [! i( j4 F
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生0 {7 ?% {1 o0 _) {
{0, 即上面所述的A(a)结果发生
O/ k, \" p7 |5 `9 ^5 q* [8 c以及& V1 u1 X" ]( w4 N9 O, E
{1/2×b(a) , 即上面所述的A(d)结果发生
% b) k! f+ ^7 o2 fR(2)={0, 即上面所述的A(h)结果发生
& L, z- a+ q0 W, x: h; q; W# k, [) I{O(a)*b(a), 即上面所述的A(a)结果发生. _3 M% d1 H: G% \9 o- M
投注主客的期望回报总数分别为! f% u. S* u; O8 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))0 c3 V+ ^- ~5 z$ e9 }8 o
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 x) I+ y5 b/ l和上面计算过程相似,得出:
6 b2 Q- P+ m# v. D* RE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
( ]! f4 t3 o' f5 TP(d)×{[O(h)+1]/2}+P(h)×O(h)=1% p5 R7 @- E$ t( W
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=14 N0 g, n$ G9 D3 ^1 s
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))2 R+ @' [2 J. \, G
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)/ _9 A, }/ R' ^: H
1/2×P(d)+P(a)*O(a)=1
# i: w% x& @ ]/ J# g1 {. s: DO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
: A; e. r m# j8 e5 d: F同样主队让平半就分别是
; u9 R# Y. h5 I+ V" w8 TO(h)=(1-P(d)/2)/P(h)
' i3 y( [+ x5 P* X+ V, d ^4 QO(a)=(1-P(d)/2)/(P(d)/2+P(a))
" l3 L q- ?4 Y! y4 @; _8 u" [7 ?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)% E! z; |# ?/ z
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
. E. L3 _$ ]7 O2 N, WB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
; K! o: M Z4 U! o# gB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
! Q! S& l5 l& L6 @B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数1 d7 U: b( E: I7 ]8 ^- ~0 N
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:
7 p9 \' r$ T) K! N8 d3 `{b(h)*O(h) , 即上面所述的B(d)结果发生
8 m/ n: z! l. i" C" QR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生- [- r6 H3 e7 N; @! G
{0 , 即上面所述的B(a)结果发生6 u+ [, g9 Q; E5 G8 c" l: U
以及
" a5 k0 b: @9 [8 ?; z{b(a) , 即上面所述的B(d)结果发生+ H9 p i* q t+ w
R(2)={0, 即上面所述的B(h)结果发生. X& }( y& [2 y2 k+ S a5 e2 b
{O(a)*b(a),即上面所述的B(a)结果发生
) f) O) B, I* d* |投注主客的期望回报总数分别为1 X! K2 N$ U1 c. Y8 T# ?1 Y
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)]) N/ x, a( V4 p
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))9 R& Y8 U8 m0 u' }
假设实际投注回报与期望投注回报相等& a4 }" N# g ?# w* N1 Z$ K
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
& K# y! X: A# O! H$ g/ qP(h)*O(h)+P(h1)-P(h1)*O(h)=1
9 y0 g# n$ S# uO(h)*(P(h)-P(h1))=1-P(h1)5 p5 a2 f: y5 `* b3 c
O(h)=(1-P(h1))/(P(h)-P(h1))3 j8 I, c; _5 A* @: k9 e
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
2 v7 r+ l4 V: d0 q* x1 TP(h1)+O(a)-P(h)*O(a)=1* N$ J. \2 z' e. q v$ z' m5 l
O(a)*(1-P(h))=1-P(h1)- C8 B6 u4 d! w4 f7 H& d& n- f
O(a)=(1-P(h1))/(1-P(h))- ^8 H$ X# m" w3 t# H
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。
3 Z+ k! q5 ^& w1 I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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