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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。
* S9 x1 w5 j0 p/ S那么,平局、主胜、客胜就有以下表达式:
/ e+ i3 a1 x6 h% ^A(d) = {W(ij)|i=j, i∈N, j∈N}. b' x2 a" f( F* l9 C6 H/ C0 y' A
A(h) = {W(ij)|i>j, i∈N, j∈N}: u5 e0 l0 `4 F! R' @0 J. V
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]:
, ^; l n" Z4 W( \, NP(i)=P(Ai), i∈{0, 1, 2}
# M! ~2 m5 W8 K% |) {+ i0 Z) w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)
: s2 M, S, b. K0 ~6 ~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 l/ h$ n* W2 t8 P
{b(h) , 即上面所述的A(d)结果发生
5 z* r' r$ w: L" \3 UR(1)={O(h)*b(h),即上面所述的A(h)结果发生/ t. W6 K1 N# X; b+ M
{0 , 即上面所述的A(a)结果发生1 a+ i. ]! n1 A# T1 R
以及6 O* U+ }. P1 I S' o
{b(a) , 即上面所述的A(d)结果发生
3 S# i0 D- a$ e) X/ HR(2)={0, 即上面所述的A(h)结果发生& Y3 S( x5 W2 z O" @
{O(a)*b(a),即上面所述的A(a)结果发生
/ d1 ?5 \7 z/ M: A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 {& Y& @6 I8 A4 \6 T5 p9 [) V
那么投注主客的期望回报总数分别为
3 Y$ X/ j+ @* d) w. K# YE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]( i7 u' c& \! {- S1 U/ b
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]- t2 e1 ^/ [. Z( V/ U3 `- h
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 z7 g3 l: {, q3 ~
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)7 P# E; Q8 \/ e8 W( b( d
P(d)+p(h)O(h)=1
+ G% j; t2 r8 v/ ?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4 u1 l Z; ?4 |! t+ D' g# S
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
. \6 I# k+ T1 F$ g* D' M$ E+ E" cP(d)+p(a)O(a)=1
8 y: J( u( n6 a/ z. M+ `) yO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式) s2 o$ _& ^; O# R
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
6 L. F0 Z$ ?' e9 i5 b三、半球盘的计算描述 F9 r% [- u3 ~- m8 b! e5 j
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)" ?* d# p7 h4 J! g# e9 N
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:
: {" R3 Q/ W+ @$ W" Z{O(h)*b(h),即上面所述的A(d)结果发生, Y9 f8 t( r7 o- C
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
) o1 W; }# Y% W0 ^/ f6 ~{0 , 即上面所述的A(a)结果发生2 m$ {7 Q5 ~! q1 G' S& \+ h P
以及
# t% A& e! ?; u+ P8 |{0 , 即上面所述的A(d)结果发生
" j* H$ x" a' g" k. H2 W$ C. aR(2)={0, 即上面所述的A(h)结果发生
9 n. O7 R; f, V [: {& i( h% F{O(a)*b(a),即上面所述的A(a)结果发生
6 \3 p* j7 ^& {- d0 B如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
5 D' O' f3 L+ a8 L投注主客的期望回报总数分别为
2 F5 A8 ?1 a$ A: ?7 RE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)] p8 ?+ ~/ I, v0 @( n* W& g" x
E[R(2)]=P(a)*O(a)*b(a)
; U( m0 _3 j5 Q3 y假设实际投注回报与期望投注回报相等% r8 _! O0 k* [! c0 f
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)- k( |. ^1 z. ]" P
O(h)*[P(d)+p(h)]=1; ^ O2 q! C3 n& f) @4 W8 }
O(h)=1/[P(d)+p(h)]
4 m3 u- \: B2 ], {+ y9 f; T6 @& O2 JE[R(2)]=P(a)*O(a)*b(a)=b(a) m$ g) \! }6 L) @
P(a)*O(a)=1+ x* ] _9 ?; K; E
O(a)=1/P(a)
3 w9 S! c' l" \: \6 N9 H同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
5 H' E ?2 f9 i2 PO(h)=1/p(h)
) _8 d8 I& {. ~O(a)=1/[P(d)+p(a)]
8 t P% _- |, z8 w四、平半球盘的计算描述% b1 U8 r" A% v( \
这个稍复杂一点+ F+ u4 ~2 a+ c8 Q* l( l8 @
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)6 j. Y P: a4 y9 t2 }
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: g& S" ]- A# s
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生: t; s5 K) @& ?% |) V3 A/ \# P
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
4 {/ \1 N- d' }{0, 即上面所述的A(a)结果发生
. p8 f8 x ^; s, k" c6 C以及
# v4 G0 w$ X3 ~8 C, O5 j{1/2×b(a) , 即上面所述的A(d)结果发生' C, ~; ^9 @4 D8 y% w
R(2)={0, 即上面所述的A(h)结果发生4 ^8 P/ o! ~4 a2 d& _
{O(a)*b(a), 即上面所述的A(a)结果发生
1 A+ _% f; w. X投注主客的期望回报总数分别为% i* u, x# x# m
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))
2 ?. N$ o( N. x0 F8 M6 }7 Q1 i; h0 mE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]! |& J: V6 r1 G) g! ^. x! ]
和上面计算过程相似,得出:& L4 R7 t" M' d8 e( ]. V
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
( X7 ]& _4 W) b8 hP(d)×{[O(h)+1]/2}+P(h)×O(h)=1
$ \ U U) p. V& |4 N9 lO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
" t8 ]. ]7 P' a5 GO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))2 s* I! B7 x; i+ F# ]" t# \
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)6 `9 ~9 j* z1 |) _+ a
1/2×P(d)+P(a)*O(a)=1. B* U0 g' e+ J; y9 l1 U# m: \
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
; \8 ~, M! f: c( I3 [- y; j! |6 y& w同样主队让平半就分别是% q& Q, @; a l8 Z7 N# @
O(h)=(1-P(d)/2)/P(h)
0 d7 b, [6 c. \, J/ U, Q7 wO(a)=(1-P(d)/2)/(P(d)/2+P(a))
& B- }3 ?3 H# U4 M" A' h0 O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)
9 m" E- R% |# U# q/ m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" K/ z4 ?/ k4 ?8 o; U; U" @
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}4 k6 {" g2 k+ G" x1 `, Z! P
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}6 s4 C2 r; ^; X2 R, {" n
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
. U* l+ B' l# n8 E, d% `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 S, h+ r5 P) k
{b(h)*O(h) , 即上面所述的B(d)结果发生* ?4 B! U* M" @9 W" _
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
$ F) E; `7 [- N3 o{0 , 即上面所述的B(a)结果发生1 m# f, L) g5 h" {4 {' c
以及
" e3 C/ [! B1 j, U0 o! A p{b(a) , 即上面所述的B(d)结果发生
5 M' T `% P/ Z# \% lR(2)={0, 即上面所述的B(h)结果发生
( j3 A1 Y* Y! s c# d+ j{O(a)*b(a),即上面所述的B(a)结果发生
# U' I9 c! t( h i# O投注主客的期望回报总数分别为1 _3 c3 z$ b* M$ p3 f
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)]
1 G* n6 W, Z9 g( R7 QE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
- e6 q- K. E6 y3 ^5 e; Q假设实际投注回报与期望投注回报相等1 _9 i& U- r# b( S' y
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
( U& |3 p: ^4 P2 ]; a" ]2 a( v3 wP(h)*O(h)+P(h1)-P(h1)*O(h)=1
) _' y' W" d; B. h# e* x7 `7 vO(h)*(P(h)-P(h1))=1-P(h1)
& ~* _. F8 D1 N; |7 g' ]O(h)=(1-P(h1))/(P(h)-P(h1))
1 ]. H, e ~) v2 FE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
) V3 b# H% Q+ D1 m+ DP(h1)+O(a)-P(h)*O(a)=1
' O$ Z: i% D, e2 tO(a)*(1-P(h))=1-P(h1)
5 u4 X, f$ ]2 fO(a)=(1-P(h1))/(1-P(h))# u) n, I/ W' r' z$ q* 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。: F' @- s6 }' P
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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