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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。8 }9 b8 u. p0 T; w
那么,平局、主胜、客胜就有以下表达式:0 F8 P4 [ ~( |6 Y [
A(d) = {W(ij)|i=j, i∈N, j∈N}
5 r9 J( ]" @# VA(h) = {W(ij)|i>j, i∈N, j∈N}
# t6 p+ p( D7 i* GA(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]:
2 I6 }6 J- |/ o) OP(i)=P(Ai), i∈{0, 1, 2}& E7 [" A6 o3 e& [7 \
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)4 b9 W3 [: t |0 N0 ~6 u/ D9 C
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:
" x8 q& A% N$ [$ m{b(h) , 即上面所述的A(d)结果发生
' V3 F. H0 Y7 R( U( c9 tR(1)={O(h)*b(h),即上面所述的A(h)结果发生. Q, E8 ~5 u2 N% Z3 b
{0 , 即上面所述的A(a)结果发生
# j9 K, D! K3 {' H( z$ w% L以及3 B5 B6 }) Q' l; k- H( `
{b(a) , 即上面所述的A(d)结果发生4 }3 a# F4 ?7 G8 U+ t
R(2)={0, 即上面所述的A(h)结果发生# D( e4 _+ x- Y
{O(a)*b(a),即上面所述的A(a)结果发生1 X# H) {1 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
! \ z) v! Y8 K" @4 X) D那么投注主客的期望回报总数分别为
4 ]& s9 q6 X/ f# FE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
# w, d' Z/ Q* L* W3 G3 vE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]1 r: W% g6 V6 _. g, N6 C& e/ i/ 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
+ B7 J: l' g6 H i- O. G* Y7 U: sE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h); t6 q4 B5 `6 x# f, q% {8 u$ ` v
P(d)+p(h)O(h)=1
7 h: ^* Z; _/ O6 }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, Q# ~4 t$ P' v6 ]
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)9 w4 R5 ?5 [' {, ?
P(d)+p(a)O(a)=1
P* }+ n. q5 F. h$ {5 {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: G" o8 \, n# M9 [0 k, _4 [
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7 l* N! V/ _& n2 ]9 j3 u- g! Q. W
三、半球盘的计算描述
& p/ R; n3 `: r" K K接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)' [# S" O5 \! y7 n/ k% ]$ 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:7 v9 V# X2 ~- v) a4 R$ M
{O(h)*b(h),即上面所述的A(d)结果发生
K2 g3 [1 l' q7 f/ C2 KR(1)={O(h)*b(h),即上面所述的A(h)结果发生
7 r: p6 n o3 N! h0 g f{0 , 即上面所述的A(a)结果发生
" q1 a ?! ]9 N& w2 h以及0 O6 ]/ }, F4 B$ [8 L
{0 , 即上面所述的A(d)结果发生
% W: S/ |. r" xR(2)={0, 即上面所述的A(h)结果发生3 J. g, `: v1 f7 p4 T. X5 ^( J, \. J
{O(a)*b(a),即上面所述的A(a)结果发生4 |) _: M& ?8 ]( |; {
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
2 g. p) _, w4 |) l, s投注主客的期望回报总数分别为
8 k: W/ w& ~( {7 w% NE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]/ v ^+ w! s N% k c5 x
E[R(2)]=P(a)*O(a)*b(a)! |6 ]' J# ?3 q/ H: b( Y8 F
假设实际投注回报与期望投注回报相等9 Q3 l# `1 g" \& L& ?
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)% w8 b [7 ?# n
O(h)*[P(d)+p(h)]=15 n! K( t$ s+ J
O(h)=1/[P(d)+p(h)]* y/ h/ j! o8 U0 U7 _/ Q" k; x
E[R(2)]=P(a)*O(a)*b(a)=b(a)
) ?3 c4 d2 F% A4 h0 CP(a)*O(a)=12 ~+ {: C/ ~5 E2 G& d% r4 M$ X6 J1 D
O(a)=1/P(a)
. W$ {4 R( |' H, D' V/ i+ N同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
. m. k; p+ Y9 XO(h)=1/p(h)
1 @: [9 N+ I! C9 A2 i. dO(a)=1/[P(d)+p(a)]3 ~& M6 _/ r8 E2 [! M
四、平半球盘的计算描述
5 S* D% J% t1 r& a, ^这个稍复杂一点; T2 K d( e6 X/ x
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)3 |/ F/ |' v# W8 H2 x1 |5 k
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:0 n4 Y% d N5 d
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
: L9 ^; U/ Y8 F+ B m9 M$ nR(1)={O(h)*b(h), 即上面所述的A(h)结果发生; R8 c4 x/ P+ W1 n3 Q" n, D% b0 N
{0, 即上面所述的A(a)结果发生
& y5 Q* L$ A* {- }; n" N3 e; x以及- W n* ?; h( M" I
{1/2×b(a) , 即上面所述的A(d)结果发生( `0 ]1 p( }7 f4 R
R(2)={0, 即上面所述的A(h)结果发生: L3 |( ~5 ~6 G, {' g$ \+ |
{O(a)*b(a), 即上面所述的A(a)结果发生
8 |3 z- f* |$ a$ J0 y$ V投注主客的期望回报总数分别为
) J2 N1 e6 Y5 `- e4 ^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))# Z. {/ j; z& I# j- w/ X6 `- S) 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)]2 e% {! M9 J, B7 a2 |# Y9 M
和上面计算过程相似,得出:
! B" _' a3 Z4 RE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)' a7 @3 l! |" G% [
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
O" e$ O* M$ d% F# XO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
+ \. w/ c8 K4 f' ~; @5 ]O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))9 s5 T+ h( O7 ~5 k- M
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
9 p# z" W% ]5 R& G6 l9 R0 i, }1/2×P(d)+P(a)*O(a)=1* @ b& @1 {6 o/ U
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)) r6 N1 a( G/ f( }
同样主队让平半就分别是 {4 v# {! \1 M: F9 [
O(h)=(1-P(d)/2)/P(h), E$ b5 h1 |; T( g# E
O(a)=(1-P(d)/2)/(P(d)/2+P(a))1 K4 W. f1 m/ u) m6 C( T5 ~$ {
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)- J( } l* n' L* @% {. X0 @& 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, [3 r9 A y# _# w7 a
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
" v' n m' {- S$ z9 t5 NB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
1 Z) Q ~2 L# O* |7 sB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数$ J5 F; F- r* L
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 M$ t9 `# w9 `{b(h)*O(h) , 即上面所述的B(d)结果发生
8 v8 c4 R. ~! e4 y' x1 ^R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生) [+ E" M% V4 m* h
{0 , 即上面所述的B(a)结果发生2 ^* j9 e! L2 H( O, {- T! j
以及 S8 V( T2 x! m8 b
{b(a) , 即上面所述的B(d)结果发生% o0 K, H; Y1 {, V5 C9 }! Q
R(2)={0, 即上面所述的B(h)结果发生/ E+ K# b" D/ d$ i& X
{O(a)*b(a),即上面所述的B(a)结果发生, m+ I0 E' l# ]
投注主客的期望回报总数分别为/ C" F3 j6 ~0 f, v: o$ U! V
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)]
8 l* b" O. {* V# i" O* U2 _7 [E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
- N# J# q* q5 `/ }% P4 L4 N7 r假设实际投注回报与期望投注回报相等9 G" A, R# N+ k" q& [
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
+ C3 ^2 E1 p/ U( p) \P(h)*O(h)+P(h1)-P(h1)*O(h)=1
+ \( D0 }& I* W1 R( bO(h)*(P(h)-P(h1))=1-P(h1)1 M' D l; @# k/ Y
O(h)=(1-P(h1))/(P(h)-P(h1))7 r& X9 f' ^! f$ U% {
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
: \ D; j; v' z; Z1 D H5 sP(h1)+O(a)-P(h)*O(a)=1
1 j* x; U1 F& rO(a)*(1-P(h))=1-P(h1)
8 Y+ k, P9 e! b/ p( [& ~O(a)=(1-P(h1))/(1-P(h)), h1 }' A# a+ n2 i/ d
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。
7 I$ H# X0 g, u8 {8 e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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