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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。
/ `( n) f# z# M5 e/ M4 r那么,平局、主胜、客胜就有以下表达式:) a, P+ q$ w+ m; d: S# _: J
A(d) = {W(ij)|i=j, i∈N, j∈N}
- w8 I& z2 [8 ~9 mA(h) = {W(ij)|i>j, i∈N, j∈N}( w6 A0 _% W7 c) _
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]:9 _) l, n/ i/ Y8 v6 \8 ^" ?
P(i)=P(Ai), i∈{0, 1, 2}5 B3 s1 h) `" A: M) t" n
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 S2 o( n" t% i4 l
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: t% J+ _( U% ?
{b(h) , 即上面所述的A(d)结果发生
2 Q, U) Y; Z3 W) mR(1)={O(h)*b(h),即上面所述的A(h)结果发生
' Z5 H; K' |& \" u8 o{0 , 即上面所述的A(a)结果发生( [0 T+ w( ~0 \- Y
以及
2 i0 o! }9 X$ A{b(a) , 即上面所述的A(d)结果发生
! n- O4 {$ Q7 U. a) BR(2)={0, 即上面所述的A(h)结果发生, u; U& n1 R9 D2 B; N
{O(a)*b(a),即上面所述的A(a)结果发生
! k. v# \) Q- @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
* S. U2 k* V- B6 \, k( E* {那么投注主客的期望回报总数分别为
6 l4 u5 K* B9 I" u. N( [& DE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]( A) d) A( s& ^
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]9 x( x% h' j6 y- i& B
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9 J$ M( T# H" p
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
8 a* L' X4 q2 s" _P(d)+p(h)O(h)=1
) p% f% G/ [6 E/ _: f' }; wO(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 A, M* m6 c7 R+ ~E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
; i9 g7 U. p. |, B9 qP(d)+p(a)O(a)=1. v6 \* f4 g, y3 h- u! x) F1 U
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
! M5 s4 r. h$ R# F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0 r4 E2 A8 y# Z% l
三、半球盘的计算描述+ K+ t# d; z2 ?3 S" @$ _
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
* A. v; ]/ a- V! a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:+ N' L9 Y% U. f
{O(h)*b(h),即上面所述的A(d)结果发生
$ f& d" g5 w9 TR(1)={O(h)*b(h),即上面所述的A(h)结果发生
R/ u- S4 ~' G4 M+ d# A$ j{0 , 即上面所述的A(a)结果发生" `" Z. F$ \$ P7 N3 c9 a3 Y# S) \
以及5 ~+ F( F, @7 }4 ~
{0 , 即上面所述的A(d)结果发生& q4 F' ^' u! \% I) [
R(2)={0, 即上面所述的A(h)结果发生5 a" D6 y) y$ Y! d& m
{O(a)*b(a),即上面所述的A(a)结果发生1 ?9 }7 Q3 Z! b% M. 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7 z) _9 e1 w! ?
投注主客的期望回报总数分别为
8 H- X! u, M! a/ u- HE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
C, `2 a/ n7 @5 G* @E[R(2)]=P(a)*O(a)*b(a)3 j8 x% L: b4 J; p+ l" v7 ^
假设实际投注回报与期望投注回报相等( ?% m3 c8 S7 e' b, [
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
$ S) K0 [( O9 y3 F2 _$ CO(h)*[P(d)+p(h)]=1. t/ {' `, y5 e4 G- A6 x7 G
O(h)=1/[P(d)+p(h)]$ _' ~) r% Q# ~: `, i
E[R(2)]=P(a)*O(a)*b(a)=b(a); y" r$ C( ~/ I1 ?9 b i3 `9 k+ V6 U C
P(a)*O(a)=1& c& y; U: j8 g: z7 W" ]5 v e
O(a)=1/P(a)) x0 X' S; O' ?% a' {
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率 E0 x8 _" W' L8 l, G
O(h)=1/p(h)1 w! B5 N+ P- h% h
O(a)=1/[P(d)+p(a)]' I0 e( d; r* }8 m: h. ^& t' m
四、平半球盘的计算描述9 i6 }, V& W: \
这个稍复杂一点
4 s$ i4 Z" x5 D3 V" ~9 U7 r接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
8 k8 G% i' Z! \* d' l) x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:+ @% P: K' L; X; i: d
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
+ t. f1 ^" A6 W& V( \0 Q3 O1 v# HR(1)={O(h)*b(h), 即上面所述的A(h)结果发生( j2 _% n) f1 I: R* k: @, P
{0, 即上面所述的A(a)结果发生
; G* B7 n j/ ~6 t# v& o以及
( J; }5 A' K$ l& V( _9 q6 q# ]5 u{1/2×b(a) , 即上面所述的A(d)结果发生
9 c* O4 C1 D- Y5 I4 kR(2)={0, 即上面所述的A(h)结果发生; |* w+ R3 a3 I
{O(a)*b(a), 即上面所述的A(a)结果发生' @! {' P; O, R
投注主客的期望回报总数分别为. Y" C0 }2 m+ 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))( f1 T) [) v4 q, Z
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)]
) V" B' j' _' V& i和上面计算过程相似,得出:
9 O& o' G* j8 ~% O5 lE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
9 z! n4 q& ^1 M* e5 x' R1 S {P(d)×{[O(h)+1]/2}+P(h)×O(h)=1/ Q2 G. F1 E( K( h
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
" q) w p5 {; c2 @# lO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
, q( M' f0 Q) C5 N7 L9 ]9 SE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)) W- T! }) T7 g
1/2×P(d)+P(a)*O(a)=1! X0 h3 V1 E! o' v3 T S
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)' N- t( t- c' e2 `/ q
同样主队让平半就分别是
. I3 s# Z8 o, p7 }& z3 P- U' V& pO(h)=(1-P(d)/2)/P(h)
) g2 M: v6 }) \! ?O(a)=(1-P(d)/2)/(P(d)/2+P(a))
8 ^' s: L2 T- H1 W, A7 L- Q1 v! `2 D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 r: V( @! E& F% ]8 q. 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+ ^- y. {2 {0 z% z
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}; @: Q2 L) \ `0 c* ]
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
# A) L q) g* a: z- V4 J# ]B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数- \ W ^$ g6 F) _+ X: t" `
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:
2 ]1 h) t5 c- u* B8 F2 ]' P8 g Z{b(h)*O(h) , 即上面所述的B(d)结果发生+ q5 R2 B+ S9 m O* I+ h8 e
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
# b% n5 M. s7 G3 v{0 , 即上面所述的B(a)结果发生
: [- v6 r) x6 X4 V) j! N; Y以及6 n4 `: V' f5 K' |5 k( X; _
{b(a) , 即上面所述的B(d)结果发生9 c* k* t+ n4 H3 N
R(2)={0, 即上面所述的B(h)结果发生& l4 Y* A4 G. F5 d/ H
{O(a)*b(a),即上面所述的B(a)结果发生7 D- @! x, `$ `" s( ~8 f
投注主客的期望回报总数分别为
/ ?: b: T7 V4 S, Z. H; RE[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' L Q" H, F" q g8 a& ?/ Y
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
/ ~: q9 t# u- n# @$ `假设实际投注回报与期望投注回报相等
4 a' Y' a' g) l) XE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)7 i- {8 ^. B# k) r
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
' o: d7 U" s: ~8 I0 L ?8 g5 V) b& XO(h)*(P(h)-P(h1))=1-P(h1)& a; P! |$ k8 D' K* V
O(h)=(1-P(h1))/(P(h)-P(h1))
( u8 b2 J1 \* VE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
4 \6 [0 { ~* g9 l2 t- qP(h1)+O(a)-P(h)*O(a)=1
5 P4 I% w0 W' v" QO(a)*(1-P(h))=1-P(h1)
U2 j% K5 f& AO(a)=(1-P(h1))/(1-P(h))
$ ~" z- C. k1 ]! Q& 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。. t1 b, L( M* `* T' Z) k
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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