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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。$ L, p6 y! o; I
那么,平局、主胜、客胜就有以下表达式:) K, E) L6 X2 A
A(d) = {W(ij)|i=j, i∈N, j∈N}* ^, M3 n$ R( z" {" t( D. h7 s1 X
A(h) = {W(ij)|i>j, i∈N, j∈N}
1 Y$ r. W5 L& ^' fA(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]:
8 B. O# ?$ `3 }( }+ L x) KP(i)=P(Ai), i∈{0, 1, 2}
4 e, q5 M0 r: [6 l5 L w9 ?/ B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)( F; E+ S1 x. h5 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:' l7 w0 e) N( h8 q. S: U, K
{b(h) , 即上面所述的A(d)结果发生
0 |- O8 S0 S2 v8 `- x* N! P8 [R(1)={O(h)*b(h),即上面所述的A(h)结果发生. B0 L a+ ]2 y" K: W
{0 , 即上面所述的A(a)结果发生
/ u7 v7 G ^0 A* C2 H以及# N# ]" S$ c: T& Y' x* }
{b(a) , 即上面所述的A(d)结果发生! U% O+ n6 z, h+ B/ u, I1 E
R(2)={0, 即上面所述的A(h)结果发生5 Z5 W6 b' g6 {7 a# J7 B5 x
{O(a)*b(a),即上面所述的A(a)结果发生& V" [7 Z3 z/ H' b
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
; z4 ^7 j( E+ @ G* Y+ l7 r! x7 L! \那么投注主客的期望回报总数分别为
5 n# ~* g; w G$ Q/ c4 lE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
* u3 Z/ E2 D1 ~3 p& U# t& S( yE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
" |5 E4 t4 O0 T, g( F \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% Q) `6 p# z+ [% a I
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
( o2 j6 j1 x/ eP(d)+p(h)O(h)=18 ^+ x& y! Z' m: P+ S7 B
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5 L- B1 b, y9 T, O, |
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)* X- N. {2 [0 h/ v! e
P(d)+p(a)O(a)=1( D7 D/ z; g2 y+ [
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
0 z \; K- I8 b$ ?( G& V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
# ]) W, B7 o' N+ D三、半球盘的计算描述
# x5 z' [( u# Y, S& E/ o接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)8 ^' Z3 n$ W" k9 Z
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:
' l1 w. s5 L! `5 Q, ^{O(h)*b(h),即上面所述的A(d)结果发生# D, o! v! x1 r A3 _
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
+ x) o8 r- S2 t/ `: v+ ~8 [+ |( Q{0 , 即上面所述的A(a)结果发生& ~- r! W7 k( [3 o& H
以及6 L5 S% [6 h: G6 `' P! l
{0 , 即上面所述的A(d)结果发生
3 d" S6 |/ [' E! C+ tR(2)={0, 即上面所述的A(h)结果发生* Z" i1 x& J* L( D1 {3 @/ {
{O(a)*b(a),即上面所述的A(a)结果发生2 f5 [0 Q, E) O
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率" N- N1 V) L, S' g* s9 h
投注主客的期望回报总数分别为6 t; X" m' c' s; A5 \
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]- t1 B2 \2 H7 @" F$ e
E[R(2)]=P(a)*O(a)*b(a)/ E. \: k1 I/ P' k; q
假设实际投注回报与期望投注回报相等 |) \ C- A" ~' X/ M
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)( D+ Q5 y3 s+ S' Y: D0 X
O(h)*[P(d)+p(h)]=1& e. W) Z# F+ B
O(h)=1/[P(d)+p(h)]4 [6 W: B i u+ n9 e' k# `! z3 B
E[R(2)]=P(a)*O(a)*b(a)=b(a)3 {4 e7 Y" G2 O: h) K
P(a)*O(a)=1
/ ]& L; I4 a2 s3 g6 NO(a)=1/P(a)
* k0 c8 w- {0 E, O9 k6 I同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率5 f( I$ a( p+ N5 q) ?
O(h)=1/p(h)- d" _" N4 H& N* t. a
O(a)=1/[P(d)+p(a)]( z9 z+ h9 G* h5 b
四、平半球盘的计算描述
1 t4 _: d" p1 M! @- Q, b这个稍复杂一点3 x3 H7 }* Y7 L8 ]
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况) p- D3 P6 s7 p* n q1 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计算:
+ k- Q8 Y! R/ n! t$ p/ `{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
7 U+ D+ e# b. m6 X7 n4 z' Q8 bR(1)={O(h)*b(h), 即上面所述的A(h)结果发生
, n/ M4 ~' L4 x+ U, a1 i2 V8 z$ P1 M{0, 即上面所述的A(a)结果发生: I% a# n/ G# S0 t5 }( n3 d
以及% q8 X3 e& ]0 p e% b7 A
{1/2×b(a) , 即上面所述的A(d)结果发生; t- z- L0 }5 ?# d& k2 K
R(2)={0, 即上面所述的A(h)结果发生& }4 X8 Q$ N" ]) _1 h
{O(a)*b(a), 即上面所述的A(a)结果发生% l+ B0 ^! f* w9 k
投注主客的期望回报总数分别为
, H4 h+ o% \, C( o, K. D# J; Q3 dE[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))
+ ^7 b0 s" r3 H; S0 ^/ lE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]7 O* K; g# K9 G; s
和上面计算过程相似,得出:
7 x( g+ f+ ?( E+ R- f8 UE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
+ a0 M8 y6 m# [P(d)×{[O(h)+1]/2}+P(h)×O(h)=1# M" n# d0 p. l
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1( X! F( q5 ?- F* q9 W6 ]
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
7 ]( B/ `8 M. V! |* `E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
* Y, T% S! a+ B" r/ [% p1/2×P(d)+P(a)*O(a)=1
6 U4 t) ]' V; BO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
2 @& w5 s- f( F# q同样主队让平半就分别是
/ u6 R# L) {0 Z+ d. w; t/ C$ DO(h)=(1-P(d)/2)/P(h)! s, X6 F9 z! z0 k8 C4 U
O(a)=(1-P(d)/2)/(P(d)/2+P(a))* x2 L3 B* t( \ D2 N8 e2 u
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)8 l6 s2 @1 K0 C: Z' g
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 O5 q: O! b; n5 v7 y& AB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
* U% o1 n" N4 e5 \B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}. i# U2 a" o: r3 M
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
" c5 I9 U, ~4 x" F8 _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:- h* L. X! H# A( _! h# d
{b(h)*O(h) , 即上面所述的B(d)结果发生
! |, w, _9 `6 x6 y6 DR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
/ D2 D; c& p3 y8 C{0 , 即上面所述的B(a)结果发生- ~! L- @. i) r1 n6 X8 j
以及
: e, i' e& V4 T9 J% a, I' M{b(a) , 即上面所述的B(d)结果发生
" D& A3 R' t: O! p/ }R(2)={0, 即上面所述的B(h)结果发生
0 e# T5 Z ]4 o2 I/ O+ H' O{O(a)*b(a),即上面所述的B(a)结果发生! {' ^# P) m. D) r( ^
投注主客的期望回报总数分别为
# q! w5 i0 H+ z7 VE[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)]2 z! j7 y0 M( N, w+ E
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 @. c0 K" i+ h
假设实际投注回报与期望投注回报相等
5 B' k+ R& B4 ZE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
# A: R. L+ n6 i9 @. y5 e0 q0 yP(h)*O(h)+P(h1)-P(h1)*O(h)=1- f8 V& B" L6 z4 R$ f! E- `
O(h)*(P(h)-P(h1))=1-P(h1)0 C0 Y1 i/ A- P( E& |8 h& @% D
O(h)=(1-P(h1))/(P(h)-P(h1))
0 R( {$ p8 ?* D+ }& NE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a): p5 I3 Z6 R6 G
P(h1)+O(a)-P(h)*O(a)=1
- L/ K8 ?% k4 NO(a)*(1-P(h))=1-P(h1). ]' ]9 Q( G' E$ r! d7 ~ p
O(a)=(1-P(h1))/(1-P(h))
% |- n0 M3 ?. |6 Y# J. ]' W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 W r: [4 R- P% W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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