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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。 D4 u+ ^6 E. [0 R0 W/ P v
那么,平局、主胜、客胜就有以下表达式:
( D. @1 w% _0 OA(d) = {W(ij)|i=j, i∈N, j∈N}4 K# p' i9 K$ B0 Y; D- g" g# w( G1 i) \
A(h) = {W(ij)|i>j, i∈N, j∈N}
) V! c! d( q, r7 b9 L9 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]:
) p# H3 S) H& S( l/ h3 w* CP(i)=P(Ai), i∈{0, 1, 2}
$ Y( O4 e9 @4 Q' ?! ^1 u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)
3 d L8 ]$ x* j j2 w5 L+ f; i# m3 M1 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:3 O" ]2 o1 O) O, e j/ L/ S& c# u
{b(h) , 即上面所述的A(d)结果发生 p/ b( A" T) N4 Q1 Z/ H
R(1)={O(h)*b(h),即上面所述的A(h)结果发生 i4 k* S2 Y0 X
{0 , 即上面所述的A(a)结果发生- Y" B3 i7 P$ E! `1 N* u1 C! l
以及8 i3 }7 p1 h& e9 V5 W
{b(a) , 即上面所述的A(d)结果发生
8 {9 {; `) v* m% n+ M" tR(2)={0, 即上面所述的A(h)结果发生
4 u+ U& C. r1 Q4 Z' g. Y{O(a)*b(a),即上面所述的A(a)结果发生
3 j) o/ O9 F5 F8 W8 @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
3 O" {: u2 b5 k4 l+ N那么投注主客的期望回报总数分别为
) ^' ^1 ]& o9 G1 ^! J8 {! m# }" Y) oE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
' Q+ \; A1 R. _7 X% n/ C) GE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]8 d! e0 i; O' h& [7 {
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 f- C. t: P( U( {3 _% L* L
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)6 I3 }1 b6 @6 ~1 |* d6 ~# F
P(d)+p(h)O(h)=1
$ [7 J: A. j& A/ `- I. N/ PO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式: p. f7 V' N. P
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)( ~1 j) Z% \1 p! z0 _$ A! d( k
P(d)+p(a)O(a)=1
$ Z, ]- A. E" o }# o' e" dO(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 Z* n( E' {+ u0 `% @/ o0 g
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
7 _. G# C& c" d三、半球盘的计算描述% C7 c+ O- t. U* f5 S* {
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
) @/ V0 @$ A- ]4 F; ]* ]; 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为:
- U) a4 _' T! @/ T% K{O(h)*b(h),即上面所述的A(d)结果发生, W+ m; E' P6 x; c S
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
. t% z& j7 v4 b" m{0 , 即上面所述的A(a)结果发生
) h) c4 S% Z( Q3 H# q2 ?( S以及( X/ m* D+ _8 ~! d9 Y
{0 , 即上面所述的A(d)结果发生( D( _! `& y G; ^
R(2)={0, 即上面所述的A(h)结果发生' A0 J4 ~* C4 }0 u/ H
{O(a)*b(a),即上面所述的A(a)结果发生* Q( T. m4 h0 ^' R4 N! r
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率4 [: e2 A; Z! s5 d% i; w3 [
投注主客的期望回报总数分别为
. L! O+ b1 W( X- ^E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
0 Y! z5 G2 J7 |# V& B/ w" lE[R(2)]=P(a)*O(a)*b(a)
$ U* W) G$ _7 Z* i6 \假设实际投注回报与期望投注回报相等5 z' t; i5 z2 M* O. Y: ]
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)2 i1 O8 Y( A" V1 R$ w% p' b
O(h)*[P(d)+p(h)]=1
* d3 s7 G+ v: v6 w6 }O(h)=1/[P(d)+p(h)]" M0 o+ S( y3 L9 ^" {* i0 `
E[R(2)]=P(a)*O(a)*b(a)=b(a)! a" B5 z% v( l1 }2 n; ~
P(a)*O(a)=1/ O" Z& k; z7 A: q) Z) [ \
O(a)=1/P(a)
0 {9 S Y) Q$ L; t同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
) c' g, n! {" |- l xO(h)=1/p(h); e6 M4 T1 S$ o2 d
O(a)=1/[P(d)+p(a)]3 m9 Y0 n# x5 I8 C# z* \
四、平半球盘的计算描述
2 |: z6 ~' I& n这个稍复杂一点
5 M( o8 Y- J' ^. \0 d7 G8 w4 ?: z接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)* j% g+ R2 T C$ Z
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:. o7 U/ B& \/ _ F- d' S+ N
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生0 J; e8 x9 k. a& O q1 o) @
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
' U& j4 R) C8 v* T, [{0, 即上面所述的A(a)结果发生
' h) {- P( a/ S以及
: @, k% @* B! W{1/2×b(a) , 即上面所述的A(d)结果发生
4 r3 {& j' d8 d+ I+ y DR(2)={0, 即上面所述的A(h)结果发生
+ L8 a$ s3 Z$ D9 y{O(a)*b(a), 即上面所述的A(a)结果发生
3 y7 }% J$ h2 u/ D* \! i投注主客的期望回报总数分别为
0 x: p& g5 F. ?3 n3 K# q1 U& z; B( ^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))9 \( i4 a% ?* a/ y' K2 l
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)]
( B: y0 M& G" h4 S! ]和上面计算过程相似,得出:
' p$ r( A% J! M* K* o/ ]& DE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)& I& h0 {$ K2 w
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
% u) j% U z3 g8 V1 Y3 W) o0 |" xO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1. p( D9 m1 H W# ^: `# L
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))& v- j5 l. v6 H: o4 ~3 |
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
& U; _% ]; [5 e l' j. k1/2×P(d)+P(a)*O(a)=1) ]* D) K5 w+ }+ x8 c* H
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
1 Q$ x$ w4 k" m* N同样主队让平半就分别是6 f6 P% R5 V& p$ ^7 c
O(h)=(1-P(d)/2)/P(h)
, z, a, v# i5 cO(a)=(1-P(d)/2)/(P(d)/2+P(a))
# G0 B; m9 M, {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)
X) l- s* m( [% s6 |+ M. h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 u: ^! H D6 Z5 B: e: }0 b
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
0 ?* X) ~+ @4 m" y: lB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}- i" h* i' u* ~% Z, s# z9 C
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数) @4 ?6 }* p H% `' m5 A
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:; n$ F. x8 P. f
{b(h)*O(h) , 即上面所述的B(d)结果发生4 D; F; |% K! z! v. I
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生# p" F% q" p5 k! z( _5 N
{0 , 即上面所述的B(a)结果发生+ T& f, F' j1 Z/ d# u3 P5 e
以及9 L5 y! ^: a0 B i5 H/ Z6 g6 n
{b(a) , 即上面所述的B(d)结果发生
2 |6 ?8 g V. V, p' w4 Z8 MR(2)={0, 即上面所述的B(h)结果发生
( J% I; n) I2 K2 D3 I$ {6 d$ k{O(a)*b(a),即上面所述的B(a)结果发生 _! I2 I( | [" U# P1 D; |6 B
投注主客的期望回报总数分别为
% h0 r: ?# r' G- H- g( X* @5 HE[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)]( h6 }- M; O: S0 F+ R5 q4 ~
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))) }* O2 R7 H" R8 Y; f/ B/ D& v
假设实际投注回报与期望投注回报相等& X8 V, Z+ J: _: U
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
+ P( X+ d* O' `& Z- o9 X8 OP(h)*O(h)+P(h1)-P(h1)*O(h)=1 c# z$ h& `) q2 k
O(h)*(P(h)-P(h1))=1-P(h1)
$ X+ A9 B9 @$ F5 u; C4 aO(h)=(1-P(h1))/(P(h)-P(h1))) h( g0 N' k" R
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)2 ? g; J" t) o0 _
P(h1)+O(a)-P(h)*O(a)=14 q$ u4 }$ f G. ?1 w* N
O(a)*(1-P(h))=1-P(h1)
4 Z5 ?) i! j I- X+ \% NO(a)=(1-P(h1))/(1-P(h))5 E+ o# o) E' M' r. s. i1 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。" m! R$ z- ?, g- _/ j: `
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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