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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。
2 t1 f) [3 f$ c, j3 K) Y2 ]( V8 _那么,平局、主胜、客胜就有以下表达式:
' M- E& u4 Q0 A$ nA(d) = {W(ij)|i=j, i∈N, j∈N}9 c- B* N! N$ d8 g: a
A(h) = {W(ij)|i>j, i∈N, j∈N}3 |9 x& P+ E1 \' _
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]:
C8 a+ |% W+ qP(i)=P(Ai), i∈{0, 1, 2}, F( w+ w4 n7 p5 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)( G& p0 ?6 _' \" P
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 `# L. g, W1 i
{b(h) , 即上面所述的A(d)结果发生/ b3 v. e3 s+ O1 G( e- G
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
9 n1 z3 b4 {+ C. s/ Z: s+ @ `1 t% a{0 , 即上面所述的A(a)结果发生
9 j. t3 k8 F9 E: U; u7 i" w以及3 |$ z3 ] \' @0 L8 `
{b(a) , 即上面所述的A(d)结果发生
' u5 G) ^6 j3 x; ER(2)={0, 即上面所述的A(h)结果发生
$ R0 J2 j6 ?: r: I{O(a)*b(a),即上面所述的A(a)结果发生
5 r' W. H2 Q2 p+ B6 e4 }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
, S9 N! T* `+ ?$ U* i3 a6 o那么投注主客的期望回报总数分别为1 v6 o& X" R8 Q( f; z$ W
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]: N) B9 k! V+ W2 e) k
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]- i U% }$ k% X( Z/ O1 C% ^! b2 ]
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
0 O+ o4 r' i3 Z# I3 tE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
' A9 g- Z$ _/ L- R# H2 C& D" e8 uP(d)+p(h)O(h)=19 S1 F; b; F, K
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
3 M. U& B o% \ @. ]% pE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
w0 n: n# @, m; o7 o- z) y' ]P(d)+p(a)O(a)=11 _! `' _/ V% l' i) P2 E: M, c8 \
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
; e+ P& l2 p8 Y6 a1 @6 f) M/ x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3 ]; P/ f! r! @2 w- {6 H5 e
三、半球盘的计算描述
( P! S- i/ x' ]) O# h% E; }接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)5 A7 R. D" Z7 D8 q9 S
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 @ Z' c/ l) f9 e{O(h)*b(h),即上面所述的A(d)结果发生" k) t P5 ^& D4 w
R(1)={O(h)*b(h),即上面所述的A(h)结果发生! V r( u6 y* ^4 C) I' K4 u3 p
{0 , 即上面所述的A(a)结果发生
. M% ~' d# ^+ `( T以及1 n7 `$ d l: g F0 P
{0 , 即上面所述的A(d)结果发生
2 C& m5 I: i/ E3 I5 G# ^* XR(2)={0, 即上面所述的A(h)结果发生
9 h* K8 R, t% e R; e{O(a)*b(a),即上面所述的A(a)结果发生- N0 J6 g. Z- x; n
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* g! A t$ s9 _6 x' p3 Z, i7 t
投注主客的期望回报总数分别为
) k9 v( D# Q8 i' N) ZE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
$ u, A2 q% i. V5 n2 Y+ xE[R(2)]=P(a)*O(a)*b(a)( C6 L# R- W$ }9 _: O9 G
假设实际投注回报与期望投注回报相等
- w( N8 k& \, X: B9 y! CE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)( [' V# {% i; e
O(h)*[P(d)+p(h)]=1
' o- y# k3 o" d* m, W" WO(h)=1/[P(d)+p(h)]$ m5 e! J* C1 e P1 b R
E[R(2)]=P(a)*O(a)*b(a)=b(a)
1 l- s0 T2 S1 N: u, ^% k) x& p! qP(a)*O(a)=1
- `9 i* J: Y1 r7 J& B8 l4 P YO(a)=1/P(a)
* p# D1 e0 d2 ?9 P3 h0 \同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率6 `4 B# b- R/ n7 C' k4 Q
O(h)=1/p(h)* [+ `# ?2 V' G+ _5 v" f2 O
O(a)=1/[P(d)+p(a)]( z1 p3 c. m6 _
四、平半球盘的计算描述1 r- ^5 C% e" Z
这个稍复杂一点
9 j) K& }2 R' `+ M% {3 S& c接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
! A/ o4 K; Q4 V8 q8 ?$ H( 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:
$ t1 l5 y* a4 H+ B{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
# m9 O/ J0 p8 i6 R0 jR(1)={O(h)*b(h), 即上面所述的A(h)结果发生% n* ]( W: {2 j* O0 u
{0, 即上面所述的A(a)结果发生4 t8 A& `2 x* c4 U! ?$ W* w. b0 g
以及
; w7 t/ F2 U* j1 h{1/2×b(a) , 即上面所述的A(d)结果发生
. r) J# W( ^4 \" G9 BR(2)={0, 即上面所述的A(h)结果发生
: \9 Y/ {" ?. P! m$ H{O(a)*b(a), 即上面所述的A(a)结果发生
+ d8 [0 d7 _4 Q投注主客的期望回报总数分别为
- z7 p* S8 B7 u% `: p Y$ ^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))
a0 F1 U+ }( W' mE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]2 B% E) `7 H9 e1 t
和上面计算过程相似,得出:: t# \5 r [5 ?
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)" R" b" t: I6 s: ^
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1' v) g& R" E3 u T5 l9 e
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
2 w$ {0 J- K6 N! w' iO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))1 Y, q$ E$ A) }) A' I
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a). r9 H0 _$ ]0 g7 G" @# K
1/2×P(d)+P(a)*O(a)=1
8 i, {4 z0 F+ {+ Z" CO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a). X: L6 D4 f7 w) h7 z" y2 o. [
同样主队让平半就分别是2 W( w' c' C! m
O(h)=(1-P(d)/2)/P(h)
1 S# S: p& R' y+ X$ i5 {O(a)=(1-P(d)/2)/(P(d)/2+P(a))
/ y! M" \+ |0 V9 v' _) B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)
: l- H# p- {8 `6 Y2 M: I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
7 t4 D# [* J @- H6 v; u, nB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}) [3 Q U* v0 R7 f" Y* N9 p/ w. r
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}+ S2 A3 @( z5 R; x$ y& c1 U9 @% S
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数( R! z5 b: p( f( j0 A8 v. m9 e4 C' V
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 o& ~, M8 x7 }" s% X{b(h)*O(h) , 即上面所述的B(d)结果发生
" L. h, i! {8 }. h9 IR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
/ x. `* J2 Z1 U8 }{0 , 即上面所述的B(a)结果发生5 i% G- A2 f, n! z8 M+ ]
以及
, D4 p/ X ^7 o6 l{b(a) , 即上面所述的B(d)结果发生2 T C- `% J! C J! O/ t. t. [3 C
R(2)={0, 即上面所述的B(h)结果发生% {8 T \& @ A) z
{O(a)*b(a),即上面所述的B(a)结果发生
9 h8 j/ ~9 p: e投注主客的期望回报总数分别为. K$ h8 K/ l1 S% g9 t: a
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)]( o% S {, p7 {" |2 c) U. @
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
" N6 P* r# @/ P* G假设实际投注回报与期望投注回报相等# N6 ?) n/ X4 x! ?, J: u* m a3 s% q$ O
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
3 b+ U; I2 D: o+ { I! U0 S* C' EP(h)*O(h)+P(h1)-P(h1)*O(h)=1' d/ [: {- I# S5 r' S1 I
O(h)*(P(h)-P(h1))=1-P(h1)- @$ Z R5 u! a0 |5 ^% f
O(h)=(1-P(h1))/(P(h)-P(h1))$ G* |4 v/ F5 D* w
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
; G7 w9 L( \2 w$ z" \6 d; N" ~0 dP(h1)+O(a)-P(h)*O(a)=1- Q7 U$ A3 \0 p9 N$ N
O(a)*(1-P(h))=1-P(h1)) R$ J; \, K9 j2 o) F8 t
O(a)=(1-P(h1))/(1-P(h))! K' i/ k$ q9 M# i7 \' n$ 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。
9 J& E8 V4 Q! N( d' M' }3 h) ~* \* {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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