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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。
1 n) {. w% z# ?那么,平局、主胜、客胜就有以下表达式:
4 t; F! W: g" ^' uA(d) = {W(ij)|i=j, i∈N, j∈N}
6 t3 H. K. p4 G) \A(h) = {W(ij)|i>j, i∈N, j∈N}
4 u4 |, _- e# {' ?7 `: {1 qA(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]:
6 g" `2 t0 q) v% o$ | {P(i)=P(Ai), i∈{0, 1, 2}
( V! F) U) Y% U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)
- r( _ O% b4 I: H9 r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:. ]$ f. ?4 v" t+ b
{b(h) , 即上面所述的A(d)结果发生
" r8 M' r- u7 a+ CR(1)={O(h)*b(h),即上面所述的A(h)结果发生. m+ `, v4 q; m- L" C- V. O
{0 , 即上面所述的A(a)结果发生, |4 s' H0 A# d2 P
以及* c+ \, z! s# X
{b(a) , 即上面所述的A(d)结果发生1 R( V- y$ ~$ Z6 Q5 H2 S
R(2)={0, 即上面所述的A(h)结果发生
- P- _; e( U% @6 Y- q{O(a)*b(a),即上面所述的A(a)结果发生
' w2 |" { @6 `% e* F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3 M! ?) F" E4 D" e& l. c2 L G
那么投注主客的期望回报总数分别为. X5 _! E* m0 I% u9 `
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]; }/ R9 z' M8 ]/ _
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
; ]6 @5 I5 k8 R: B$ E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
4 L' n2 H! n2 }0 I2 I; |- yE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
1 ]/ V& k6 x$ ~; a8 _P(d)+p(h)O(h)=1& @4 T0 l+ ]' j0 s: S) |; W
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7 r; r3 @ n7 l. r
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
& h! q3 V; h" f( q; P: X2 XP(d)+p(a)O(a)=1! C5 c$ O1 h8 O( K: o8 V9 C; i
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+ ^& F s* d6 h; f- d
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
5 [+ F) }+ g$ l. N! G5 r% O三、半球盘的计算描述
6 v4 i9 Q+ @$ V' A接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
( I2 q: J6 y; Q3 d& 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为:
+ [/ T, d- {/ G- [# U |; i% ]8 @( U4 n{O(h)*b(h),即上面所述的A(d)结果发生
5 U# D x/ a6 y5 d$ J- s& hR(1)={O(h)*b(h),即上面所述的A(h)结果发生# X9 W- j; O2 F0 _) X- _
{0 , 即上面所述的A(a)结果发生8 d& P4 ` x: A' c4 }/ E+ }6 l7 E1 Z
以及
1 j& T* }5 v+ k* G/ a{0 , 即上面所述的A(d)结果发生6 u. i- O, ?! N# g
R(2)={0, 即上面所述的A(h)结果发生& A% d% S/ }% y5 |* H& r7 ~
{O(a)*b(a),即上面所述的A(a)结果发生
& P) }' V9 f+ Y1 v3 j如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率+ U* P/ f* C! a; B, y0 A3 E# P
投注主客的期望回报总数分别为/ [3 l, \+ G, E$ C. P' Z' U
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]8 R0 Q$ q9 j1 z, e3 P0 ^$ D$ I
E[R(2)]=P(a)*O(a)*b(a)' f. s4 A; n3 E8 r9 D0 Z; c
假设实际投注回报与期望投注回报相等. a: k8 V7 u8 N
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
z( B; Q8 ?1 iO(h)*[P(d)+p(h)]=1
3 r8 c) W: O% s0 i1 T8 K/ w7 dO(h)=1/[P(d)+p(h)]( ], n7 `3 G8 g. e
E[R(2)]=P(a)*O(a)*b(a)=b(a)
) l3 @8 Y& ~: _* D! C, ~( gP(a)*O(a)=1* B; C2 q, |) [ Q; M# u# K. `
O(a)=1/P(a), v F9 a: q( ~. ?
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
8 ~# Q, a3 k U. E- r5 }9 v2 LO(h)=1/p(h)" V1 I8 r! N5 U/ i
O(a)=1/[P(d)+p(a)]# r# [9 y5 u7 ~9 m: r7 z2 M
四、平半球盘的计算描述! ~1 y+ ]5 z& d" L3 r6 i8 I
这个稍复杂一点) q. W# F0 `; D1 P6 Y/ a- q
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)8 }, R/ Q4 x+ Y) [, [4 U5 ^6 N2 V, C
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:
: w6 C, r& e0 w3 W! `{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
! }; `& X) r" n. vR(1)={O(h)*b(h), 即上面所述的A(h)结果发生
7 n+ _1 R) P- ] E6 Y- s$ q{0, 即上面所述的A(a)结果发生/ a9 C2 y: Q/ \% B
以及3 d/ |* w Q" c) {; P! X
{1/2×b(a) , 即上面所述的A(d)结果发生
5 g% g' Y- t) s6 V+ ~R(2)={0, 即上面所述的A(h)结果发生; z, o, M& A7 ~4 T2 Z1 S, l
{O(a)*b(a), 即上面所述的A(a)结果发生$ a4 T0 {" f( x" ?
投注主客的期望回报总数分别为
8 P# `1 u3 _; w) J% Q$ \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))
3 u. R2 p: b$ P. s6 M6 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)]
$ ]& P* O( x7 Z$ A f, ?和上面计算过程相似,得出:
* |* r. n1 j' C- AE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)0 o1 u9 i7 y. \2 L) y, A
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1) n6 S1 ?& e7 b5 \0 o
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1+ {( n, l. p! G! G% p, u
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))# r- R3 ?6 B' Q0 I% i8 `$ Z3 k9 z0 I
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)) |- k7 j7 \! M; s, r$ x
1/2×P(d)+P(a)*O(a)=1
0 F+ ^. x. w& [" b/ LO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)$ E R. J+ Y P2 {
同样主队让平半就分别是( m3 d' s1 N: }% \
O(h)=(1-P(d)/2)/P(h)2 u. I6 Q7 t9 H) E& A# U- J
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
8 _, J9 |' H7 h5 m! A2 E7 q( D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)# {: o, R+ ?6 g9 p( j2 `" a: N
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 x) p% z/ O1 A5 H2 UB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}# l1 _8 q0 E% W y# X1 f! U" G( o
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
$ u* V" N$ C9 k5 U3 vB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
8 [( C0 B$ x2 x8 Z* f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:
6 C% O2 O! f5 t{b(h)*O(h) , 即上面所述的B(d)结果发生3 F- ~. ?5 G6 g. z i& a
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
5 N$ H) F( v- [) u{0 , 即上面所述的B(a)结果发生
4 I8 R. N& H w* n" P以及
+ Y6 i6 J' N0 @& o. M; ]+ t/ v0 g* F3 M{b(a) , 即上面所述的B(d)结果发生
8 ^9 Z) n, f: _1 G% @( fR(2)={0, 即上面所述的B(h)结果发生
7 ~ T7 V4 ^9 t! t2 r: k9 m{O(a)*b(a),即上面所述的B(a)结果发生4 s v- g7 }4 W9 U- }
投注主客的期望回报总数分别为* P# b0 c! {0 m% e9 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)]5 j- c4 U& U# u8 f# z
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))8 S$ q/ W; i# a; I- O1 o3 r. V
假设实际投注回报与期望投注回报相等( m- f* T3 n ]" s. @4 }% W$ I
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)3 F6 b2 Q0 e9 _2 z
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
% J9 E2 m- `8 e X# e0 U. Y& @O(h)*(P(h)-P(h1))=1-P(h1)( o1 i2 r: o- g- @) \
O(h)=(1-P(h1))/(P(h)-P(h1))
a' p+ O0 U+ R7 SE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a), ~1 F& P) {: R
P(h1)+O(a)-P(h)*O(a)=1
7 A" h1 l, E9 Q/ [- G8 q) nO(a)*(1-P(h))=1-P(h1)
/ V" A! Z! V4 nO(a)=(1-P(h1))/(1-P(h))
) M! M. Y+ {5 n# r( k' |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。
4 ]6 M* i# W. T+ M" P5 U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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