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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。
' N6 T& z$ A) t, p" A/ r那么,平局、主胜、客胜就有以下表达式:
; r- _/ }0 v0 FA(d) = {W(ij)|i=j, i∈N, j∈N}3 I0 z C/ w1 M: g0 m! ]
A(h) = {W(ij)|i>j, i∈N, j∈N} F7 Y. M4 Y3 a0 Y. U# s
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]:
1 d' Z; f/ N: f' oP(i)=P(Ai), i∈{0, 1, 2}, A3 S1 N# v0 Z, r+ A
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)6 g/ |; ~$ \, ]" v: z3 K1 B
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 {" o6 l4 n9 w# B
{b(h) , 即上面所述的A(d)结果发生4 T# P* A1 t% G: J6 X D% T% G6 ~
R(1)={O(h)*b(h),即上面所述的A(h)结果发生' a/ e' A& {; \. u- }
{0 , 即上面所述的A(a)结果发生
, G3 v% M& A! ]) y) Z以及% W s( Q: ?1 \+ O
{b(a) , 即上面所述的A(d)结果发生
/ n ?% h6 i1 W1 ]R(2)={0, 即上面所述的A(h)结果发生
" z& z1 X6 x! T+ }7 o{O(a)*b(a),即上面所述的A(a)结果发生
8 ~ a3 _' t7 u9 f# 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
. y4 G' R+ y+ c: P那么投注主客的期望回报总数分别为
( H3 X) x, t( m' T4 oE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]+ t' `& N K7 g c2 c
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]* N/ w$ K; \, s6 k
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! X2 E; @- D& u0 L5 n% g+ b7 Q7 A7 s
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
4 R) E& R8 b0 r; R" z+ N8 { n& l: s: ~P(d)+p(h)O(h)=1
) S5 Z, L- `5 w* \3 z+ DO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式
4 M4 }7 t+ L/ G* L1 b- FE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
( z1 v& B" S3 c, e$ |% H1 P. mP(d)+p(a)O(a)=1
/ R) F6 p0 p% u2 mO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式% {" r9 s* `6 s7 q; h$ l
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% U# y+ u N6 v- z; K1 @+ c
三、半球盘的计算描述; o$ |8 A( R1 g& Q2 B8 _$ N
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)4 A- \( d, v" r8 h6 c5 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:
& ^- t9 B" S% z7 x{O(h)*b(h),即上面所述的A(d)结果发生' F7 C5 `: q V+ H6 K# C+ G
R(1)={O(h)*b(h),即上面所述的A(h)结果发生: `5 i: I6 \: s. g) n% R& Y
{0 , 即上面所述的A(a)结果发生( ?. t( R Q$ X8 D; j
以及
0 s3 P; X. q S/ c; u{0 , 即上面所述的A(d)结果发生
+ O! w$ |& [" \- r2 C {+ xR(2)={0, 即上面所述的A(h)结果发生) k! l* C1 {) ] |7 E; s" N6 x$ v
{O(a)*b(a),即上面所述的A(a)结果发生
" ?" W2 k4 ^4 m' b8 U如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
! T/ g) `- Q# k1 m投注主客的期望回报总数分别为
. N, o' q G- }& W) ?E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
9 R8 j9 L8 v1 t, h: }1 RE[R(2)]=P(a)*O(a)*b(a)
. h- ^8 h1 A8 |假设实际投注回报与期望投注回报相等
7 x; J( d' ^+ |9 k5 ~) jE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
7 o' c4 s1 v( V: O {O(h)*[P(d)+p(h)]=17 L7 c. g* |3 B1 a
O(h)=1/[P(d)+p(h)]; E5 }0 i- R, k+ B3 ~/ F6 ]
E[R(2)]=P(a)*O(a)*b(a)=b(a)- p' Q0 I1 c- L, [! @2 B
P(a)*O(a)=1
0 F0 | ^) \# q1 T5 oO(a)=1/P(a)3 e+ K+ u- Z. h0 V2 p
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
: Y* _0 s5 `: I& Z1 {; IO(h)=1/p(h)2 O# }7 _" q5 s0 V- @/ a
O(a)=1/[P(d)+p(a)]0 R1 k0 N2 ^, g6 l, J
四、平半球盘的计算描述
/ J% e5 d- k6 S0 B9 b* G这个稍复杂一点
) L; J- C/ ^1 c8 ]: @接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
; n$ q* ~3 F0 j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:
+ k: M% ]- E# B5 Z{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生# Y |3 v; u6 B3 \5 G" V' U; q) A
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
" [/ }. L, ~: ^0 R{0, 即上面所述的A(a)结果发生7 S0 h' w" Z; t Y) q
以及
$ ~3 p2 O: v. |7 M7 u{1/2×b(a) , 即上面所述的A(d)结果发生
0 K; t" B3 F. \/ MR(2)={0, 即上面所述的A(h)结果发生
% N, J! m: _# G! _' k6 d{O(a)*b(a), 即上面所述的A(a)结果发生
& V9 ~' Q# r% H9 N7 R! Z5 [5 Z; T投注主客的期望回报总数分别为3 t o" y4 v: `: T k, L B; i. B2 i* k
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))
( p6 l3 U8 k# e& [1 |2 c, HE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]
( @, o; R% x+ k O和上面计算过程相似,得出:
9 {( u! L" X: `0 m. ZE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
, Q9 w! F/ m; T- dP(d)×{[O(h)+1]/2}+P(h)×O(h)=19 j1 G4 f5 d9 g& t# f8 ~; W& H7 E& @
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
5 T% }' D$ S* {& Y. RO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
6 t. w2 a( b( T2 x/ HE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
3 m/ L1 g% t2 X6 N. m7 m" p1/2×P(d)+P(a)*O(a)=1
. `$ ~$ n1 N4 ]2 WO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)7 l; U: [! ]2 ]$ d
同样主队让平半就分别是
1 c5 A* y3 ?& a7 P" ~( _* PO(h)=(1-P(d)/2)/P(h)# n( s" \7 Q& a* o) m
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
7 n1 w: P% L# |0 t- n. Y) P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)6 I9 U; Y# Y5 h6 E
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
/ V$ k* ^4 X) q) W$ T; H/ B5 K1 zB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
9 B$ a4 Y5 f, ]' s' k; Y" U) |B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N} p: u. z3 j+ j8 t$ |+ L
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数% Z2 |3 ?+ V+ M( h/ j% [3 S
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:( n9 n$ z: W( |( k# T; }; \
{b(h)*O(h) , 即上面所述的B(d)结果发生
. z8 @5 j' f! n8 }# U, v% @R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
2 \! c, x2 s s{0 , 即上面所述的B(a)结果发生
. C& J7 j; R8 w" T以及: h2 ?! H7 \4 T4 M( J
{b(a) , 即上面所述的B(d)结果发生
7 K" c0 v; e6 IR(2)={0, 即上面所述的B(h)结果发生$ F: c$ `; O P% z& _$ J; W9 J2 w
{O(a)*b(a),即上面所述的B(a)结果发生
G# _" j0 Z' z8 m9 M# L; q投注主客的期望回报总数分别为
" _0 Y4 P2 o/ 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)]
6 }: {. w% M( t% S) }/ CE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
$ w9 }' p V4 H- X( b, X假设实际投注回报与期望投注回报相等3 G7 v$ v' i0 G
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)8 k" ~1 S( y8 q/ r
P(h)*O(h)+P(h1)-P(h1)*O(h)=12 E4 p0 `2 a& t2 }9 g/ A3 R& L
O(h)*(P(h)-P(h1))=1-P(h1)* D$ H. H) L3 H1 _8 c
O(h)=(1-P(h1))/(P(h)-P(h1))
9 _' ]0 _7 ^' m7 y+ T/ qE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)0 i7 b+ C( m3 P) H
P(h1)+O(a)-P(h)*O(a)=1
. A V+ J& p% o0 e$ G/ \O(a)*(1-P(h))=1-P(h1)- V. N U" @9 i8 Q" p# F8 \( u
O(a)=(1-P(h1))/(1-P(h))* X/ k2 E0 e& C5 W
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。
) ^0 t3 @/ F: y/ }6 b. 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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