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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。
7 W3 V' G, ]- R$ _7 p! a那么,平局、主胜、客胜就有以下表达式:
4 B4 h! Z" X" A9 N; PA(d) = {W(ij)|i=j, i∈N, j∈N}
5 C3 o( m/ O( d) M) UA(h) = {W(ij)|i>j, i∈N, j∈N}5 q; m4 M% w. |6 f
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]:* Z" {* o2 e9 e7 w
P(i)=P(Ai), i∈{0, 1, 2}
: f( `9 M/ L) R d9 V0 X2 T: Q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- a1 r/ N" g/ v
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:
( ~+ V" Y7 F$ ^( J# J) M# E( ~1 p{b(h) , 即上面所述的A(d)结果发生
! F- a6 C7 @, }6 k8 HR(1)={O(h)*b(h),即上面所述的A(h)结果发生0 z: s5 i. q* m0 L0 \
{0 , 即上面所述的A(a)结果发生' m$ w! Y& Q* t8 J* j
以及
" {: d$ {/ e% \. X$ A{b(a) , 即上面所述的A(d)结果发生+ P+ g: y( u6 ]; U7 y
R(2)={0, 即上面所述的A(h)结果发生
! x$ s D0 x1 }9 p{O(a)*b(a),即上面所述的A(a)结果发生
$ O) R V. P) x& F5 d$ D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2 J( E2 j0 Q3 ? w( G6 M! o
那么投注主客的期望回报总数分别为
. m3 V; n. `. M( ^5 W$ d, RE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
- W. M6 ~8 [6 s# [$ T0 w: dE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
' N" W. j! G% ]2 o) W2 T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
% J0 u3 g- e- E SE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
5 ^2 O' U3 k; g8 N+ cP(d)+p(h)O(h)=1
4 I% Y: a( R' P; b1 M# E3 ?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
+ B8 f1 z9 q0 o% rE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a), a, @' z; i" |6 F* h
P(d)+p(a)O(a)=1! i+ M [$ i7 {" [0 P* g: x
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
" b7 B: N! X C1 e/ 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
8 z. G) h" y6 c$ D; G1 O三、半球盘的计算描述
1 P4 R- J1 a5 P2 y% M接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
. u, z6 J. O7 i7 l* ]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:
0 ^) O" B3 b6 W. k* g* e{O(h)*b(h),即上面所述的A(d)结果发生
6 X9 C$ y5 g9 h+ v4 uR(1)={O(h)*b(h),即上面所述的A(h)结果发生
/ V) ]: _8 Q; V& ~2 U8 T{0 , 即上面所述的A(a)结果发生* n5 }0 H& B# ]+ e
以及' g8 o# C0 P: V# e# y8 T3 A* R
{0 , 即上面所述的A(d)结果发生8 b6 l, Y# \, h' W6 ]
R(2)={0, 即上面所述的A(h)结果发生0 p' d/ }% }) A# j0 z0 |- f( {
{O(a)*b(a),即上面所述的A(a)结果发生1 r) e) O% ~" t; \8 P& g9 l
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率( z4 f# D( [) f8 Y$ x4 _
投注主客的期望回报总数分别为- L) c" h5 d/ ^& z {" q4 ]$ j
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]1 f# `1 G! p3 y$ b! N
E[R(2)]=P(a)*O(a)*b(a)
2 w& O$ U, I; ?2 j+ P5 c假设实际投注回报与期望投注回报相等1 Q1 A9 E' ?) @4 i3 B# @
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)) V# W8 p1 v! z2 u5 l# t
O(h)*[P(d)+p(h)]=1) u+ K- ^- S' `& O) c
O(h)=1/[P(d)+p(h)]. o& c1 k' m) t" b+ b! j; h
E[R(2)]=P(a)*O(a)*b(a)=b(a): U* ~$ i$ Z7 X c
P(a)*O(a)=1" Q0 Y; X( A- {# T, y
O(a)=1/P(a)- d m6 Z2 G" V& ]
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率. I7 P. e- g) {! M, l" T
O(h)=1/p(h)
+ L0 s4 P, O/ H! b& z$ uO(a)=1/[P(d)+p(a)]: g" O5 W& u! l( V; S0 a
四、平半球盘的计算描述" Q1 p( Q, }7 W3 \; w0 Y% X/ h3 O
这个稍复杂一点4 W( }7 c. X3 N( z" E; R
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)0 S1 G; S- {6 y. K& {$ 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:% N Z! H' y6 h8 P( o0 A2 q
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生$ T/ R8 \" H5 n: ~+ A j+ D
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
3 R+ G6 ~5 K4 R% [! j; d{0, 即上面所述的A(a)结果发生
5 f, {( d( k3 T) _6 A+ |以及3 e* k% ~3 D' n3 {, g1 W
{1/2×b(a) , 即上面所述的A(d)结果发生
7 X% Z1 \! A* lR(2)={0, 即上面所述的A(h)结果发生
: C- q/ F% y1 P{O(a)*b(a), 即上面所述的A(a)结果发生
7 I8 k" q2 d0 d投注主客的期望回报总数分别为0 h, D. ]9 D5 U5 l
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))5 [& j8 Q; ^8 s
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)]& c( s4 `, O! x0 w1 e, p
和上面计算过程相似,得出:+ U5 j" [+ _- ^& N/ V6 w2 B
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)/ E- U3 l5 \$ F$ a' r
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1& A/ @5 x2 ~7 E7 R8 D0 b
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
4 _" X$ j( b! [- j1 H0 nO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))( ^/ w5 G$ r7 h2 G3 S
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)2 @ v% o6 W% C% P
1/2×P(d)+P(a)*O(a)=1 k% M8 `4 F W3 ]' b6 Q) ^& r
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
+ E8 X4 G1 P) j" o3 T同样主队让平半就分别是
: K" F6 e8 I& q6 f# @O(h)=(1-P(d)/2)/P(h)0 ]; o" m5 o, i' B
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
$ a' ^0 p+ U3 o- L- ^. L& R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)( m+ \/ E' Q f6 W/ Q
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5 E/ ]) H! R, R0 U$ }8 w9 k
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
% |7 u$ k% p) i, ZB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
: Z) z& d& V! c- a; P: uB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
0 u2 m/ O# c4 y& e7 y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:
5 F7 `4 t8 u# l{b(h)*O(h) , 即上面所述的B(d)结果发生
, R6 t3 `8 z- `, c( m* J! DR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
; B' r8 G! a6 M! J{0 , 即上面所述的B(a)结果发生3 O" V% G# ^# Z- \
以及
- q- E* U( e3 d% @5 @, L9 p{b(a) , 即上面所述的B(d)结果发生& {) J& ^0 W( T/ l' E6 |1 s5 W
R(2)={0, 即上面所述的B(h)结果发生
* U2 y8 T. F. W. m{O(a)*b(a),即上面所述的B(a)结果发生: o! s) ^5 y0 j+ F* U
投注主客的期望回报总数分别为. C: y# G: ^, N
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)]4 t: r" ~* b( }
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a)); E1 G5 h; C( P& S
假设实际投注回报与期望投注回报相等# C! K# ~( K# k8 p
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)# I Q7 E0 C- W3 m1 s
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
! v2 k! C$ j* Y5 UO(h)*(P(h)-P(h1))=1-P(h1). a9 C( H4 j7 `. c; T" f
O(h)=(1-P(h1))/(P(h)-P(h1))) n* t8 q# I- L7 L' v9 n
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
. q+ b* p7 R# ]3 z- Q1 j: gP(h1)+O(a)-P(h)*O(a)=1
5 M& [/ y1 ^' b9 Q9 P; WO(a)*(1-P(h))=1-P(h1)9 c5 W) g6 S: J W+ q$ t0 f
O(a)=(1-P(h1))/(1-P(h))
. y7 H7 j/ K/ m3 J8 I- 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。
: ]1 Z. m4 [# M2 ^+ _ \: m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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