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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。5 J% o, Z* M. k7 i Z) C$ D
那么,平局、主胜、客胜就有以下表达式:* s1 Q" f' @# r7 L
A(d) = {W(ij)|i=j, i∈N, j∈N}
% d5 I8 @2 B0 s8 c( q' }A(h) = {W(ij)|i>j, i∈N, j∈N}7 S5 I$ C/ f7 [6 R* Q4 h
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]:* T0 O/ l9 L* u8 W" ` s- J
P(i)=P(Ai), i∈{0, 1, 2}6 v2 P! H1 O( u% `; E: o8 Q% i: p8 p
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) X% n: h# c) v* d- d
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:. r* R! p6 B5 M( o' n, y
{b(h) , 即上面所述的A(d)结果发生
1 d) F# a5 ?& U0 d0 |! AR(1)={O(h)*b(h),即上面所述的A(h)结果发生
, N# j3 U; c, b. w: S7 H{0 , 即上面所述的A(a)结果发生1 X" Z* P3 Z# C: c3 k+ b. H
以及. l+ `4 x- Z; t
{b(a) , 即上面所述的A(d)结果发生 v/ w4 l* r5 f* n$ M1 D+ p, {
R(2)={0, 即上面所述的A(h)结果发生2 w4 d. O4 j' L) N& I; F
{O(a)*b(a),即上面所述的A(a)结果发生9 ?: e1 c; Z! m6 E# l
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" ^( ^' R1 b2 j
那么投注主客的期望回报总数分别为
a8 n" n, N, wE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
& ?* A: e; o/ hE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
/ M6 |( ]8 g* W0 _/ }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
/ R/ n: F7 |: A0 r* e VE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)2 N, X }' a4 H# _
P(d)+p(h)O(h)=11 A) s# n4 q. Z; R
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2 V ^6 | v3 D. T$ {9 X9 I$ H
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
* I8 b0 C0 S: K' b$ Y) B8 ^/ rP(d)+p(a)O(a)=1
& L) v' w! S X5 @) JO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式
, L) y2 M5 L* s! O4 [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: x2 S/ y# d7 E+ H
三、半球盘的计算描述" x8 i$ L6 U0 \4 I! E7 o1 A
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)1 `' Y! m& }; y% J, T
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:; a- K3 q2 N8 g( @3 [1 n
{O(h)*b(h),即上面所述的A(d)结果发生; r( i9 h) d$ `
R(1)={O(h)*b(h),即上面所述的A(h)结果发生& K# ]$ y! W7 F0 Y( ^, O) V5 {
{0 , 即上面所述的A(a)结果发生
( x& S5 X/ P! Q) D0 e以及% z O. y& I$ Z I. |, @
{0 , 即上面所述的A(d)结果发生! |& C: P. S# d' k, ^
R(2)={0, 即上面所述的A(h)结果发生
, ?; K2 W6 {6 | a{O(a)*b(a),即上面所述的A(a)结果发生
b& z1 [% q: 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
) |1 B; O) z* Z- A/ B7 Y; N: `投注主客的期望回报总数分别为: p. s m* x! Z8 C2 R: p+ s
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]. r5 H; {9 X+ _2 ]7 t0 m1 G& a
E[R(2)]=P(a)*O(a)*b(a)
! W" i) X; B# {0 n8 c假设实际投注回报与期望投注回报相等; C3 h4 A6 ?5 \! O$ l
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)6 \: z$ C' L( ]* S
O(h)*[P(d)+p(h)]=1
4 C0 W; s2 G+ j. r+ A2 M9 ^: \O(h)=1/[P(d)+p(h)]. z! }3 J& g- ]; M
E[R(2)]=P(a)*O(a)*b(a)=b(a)4 L$ b" D, J; i
P(a)*O(a)=1
5 ?% a( d, b" k* c& f$ ?O(a)=1/P(a)
8 m) `, f$ t- b7 [同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
2 {4 Z! I% Q' B- J! G. M4 aO(h)=1/p(h)4 E4 {( a/ g) {, ~1 M, \
O(a)=1/[P(d)+p(a)]; k; V# `% `$ } w* t6 r
四、平半球盘的计算描述% Y- ^* X6 D" d n: j
这个稍复杂一点
8 \( l; R1 I8 n+ I& E$ h接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)4 c: y5 Z, s+ C1 b8 r
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:
; P8 Y3 _7 r, b" h0 u{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生% S# N5 V, W' e- s
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
" ~; L( p' c# ^( S) a0 E{0, 即上面所述的A(a)结果发生) Q# X# K6 X$ U" V5 Z
以及
9 k0 T2 M3 {% Q! x' d& D# c( e# q{1/2×b(a) , 即上面所述的A(d)结果发生
* D0 r" j) U7 u1 c( aR(2)={0, 即上面所述的A(h)结果发生7 i3 i0 j! c- ?, Y; l
{O(a)*b(a), 即上面所述的A(a)结果发生
( v" F- N- s( T; [$ c% j" _* Y1 N3 C投注主客的期望回报总数分别为- o& d; W) x6 \' t
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))1 w4 v* j2 A+ l1 V! b5 Y/ e
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)]
/ _/ g# {' K, U* G& ]" O+ M和上面计算过程相似,得出:4 I7 V" o& U/ j7 w
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)$ {- {5 i# D' G2 B" ]2 Q* `* P
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
! I a; K: `7 Q: H$ wO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=18 D* l {* O6 A4 A& i# Z
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
- S3 m. s8 w8 d1 i4 b7 gE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
, T9 S- O& P! h0 d( @) D1/2×P(d)+P(a)*O(a)=10 s- P3 |9 |* j# b8 E" v
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)5 G" G6 E/ s R9 m+ Y8 O2 Z3 @
同样主队让平半就分别是* k4 i+ x0 J) W% Y m
O(h)=(1-P(d)/2)/P(h)! }( C6 L7 d+ l9 k, i* `
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
; Y% w+ x, E6 {! l5 ]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)
4 z. }+ \+ G, x: x, {3 ?: B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) Z9 @% @6 h) J# P6 n8 c- q7 U
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
8 O; K0 e% y3 z' N. I( \8 qB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
; }+ x8 w o# U$ T8 e f8 SB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
2 {# l1 `) R' z% J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:) S# u' j( H) W a+ c
{b(h)*O(h) , 即上面所述的B(d)结果发生
) d- n* ?* q2 D/ n. I5 ]R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生! e3 y; h# c. z$ o
{0 , 即上面所述的B(a)结果发生
, x. F, \: w/ ^ d$ H6 r以及
0 ]6 ~4 N/ x. M" X* I( l{b(a) , 即上面所述的B(d)结果发生
+ d; I. a3 N, Z4 S0 eR(2)={0, 即上面所述的B(h)结果发生
8 j; c6 y" j% ~- ?{O(a)*b(a),即上面所述的B(a)结果发生' j5 a1 w5 z1 O; k
投注主客的期望回报总数分别为
! N/ s$ x+ f" O! t4 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)]
- a4 Q& }9 `4 tE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
9 e$ X" M/ J3 e假设实际投注回报与期望投注回报相等
4 r6 ^6 F7 F7 x0 j# q9 FE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)1 j0 w8 X1 n& j. ~+ R
P(h)*O(h)+P(h1)-P(h1)*O(h)=1# h9 q! e$ c' q1 t- Q
O(h)*(P(h)-P(h1))=1-P(h1). t# H9 }& B( M+ `4 v% ?% B( E7 K
O(h)=(1-P(h1))/(P(h)-P(h1))- X; ]4 @( g3 B
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)( e/ e" w/ X' w; v) c
P(h1)+O(a)-P(h)*O(a)=1
/ b3 O0 i, U* t7 S* q; U, JO(a)*(1-P(h))=1-P(h1)
* y/ P: X- Z; q3 JO(a)=(1-P(h1))/(1-P(h))
- e( a, f) W7 F/ U* S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, r4 Q4 f0 L1 q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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