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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。2 e6 y X- M, d$ C# D
那么,平局、主胜、客胜就有以下表达式:& ^- W3 a1 \3 s) r' B
A(d) = {W(ij)|i=j, i∈N, j∈N} G6 \: W( ]" o
A(h) = {W(ij)|i>j, i∈N, j∈N}
* |7 Y9 _! j |. C4 v5 UA(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]:
# k5 `; G c8 U# y. F1 }, L* h1 ZP(i)=P(Ai), i∈{0, 1, 2}( `2 s2 i! S. u9 k. M: 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)
7 O! S. `) M1 c! p% H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:1 O; N( C6 }* M1 p
{b(h) , 即上面所述的A(d)结果发生
9 U4 Y" G" V* p) V* [3 IR(1)={O(h)*b(h),即上面所述的A(h)结果发生* Q1 ^# B: A: _9 o% t6 r P. ~
{0 , 即上面所述的A(a)结果发生
4 Z; \0 M& a/ v' C# p0 a以及
5 z8 {3 A3 l, i# t{b(a) , 即上面所述的A(d)结果发生
2 Q+ T/ w) e" h! P8 Q- gR(2)={0, 即上面所述的A(h)结果发生
0 C R1 R5 N' {{O(a)*b(a),即上面所述的A(a)结果发生
+ A3 k8 W0 [1 L7 c* I9 a6 @6 {9 w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
|- Q ]# W# P8 c6 W' B那么投注主客的期望回报总数分别为
3 A3 i. j! \: d: R$ IE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
$ N! T& k( e# ?6 e/ p1 m! VE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]* e% l0 D# m" P$ d- b
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
+ n8 s" D4 G1 N6 k5 B# ~E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)0 k( ?3 @% O' G
P(d)+p(h)O(h)=1
( b& ?/ B+ ?- U7 {3 x% _3 cO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式
) U1 e2 d) Y1 J8 M; HE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a) A$ Z [, j' V- u1 ]
P(d)+p(a)O(a)=1
- ?7 b! v) m- ]5 l; H$ b' K. F! nO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式
- e) O3 p/ Y' _# E G5 W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
& B% i5 g) P4 k1 p7 s) I三、半球盘的计算描述
( X) f: M2 M7 _接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)7 Q1 g7 W' A. |5 V0 b9 i( 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:
9 J7 G: ]. W' W{O(h)*b(h),即上面所述的A(d)结果发生
0 |! h5 V9 @) \6 ]7 X* j2 qR(1)={O(h)*b(h),即上面所述的A(h)结果发生3 |, I# B$ N/ s4 I- E4 R
{0 , 即上面所述的A(a)结果发生
" J% s; F8 y! w' N4 W2 K以及# j# |' f, c( [5 P! ~
{0 , 即上面所述的A(d)结果发生5 `+ D1 ]; z D' q. h: {, D
R(2)={0, 即上面所述的A(h)结果发生
$ ?& K& k. Q1 G5 y- M1 o: l{O(a)*b(a),即上面所述的A(a)结果发生( i0 Z; A1 h- Q8 ]) l# 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
0 D5 ?9 B4 R- D L投注主客的期望回报总数分别为# N% F: d+ f( R3 F1 f# f% _9 {
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]9 y* R' i3 A9 h. Q# H
E[R(2)]=P(a)*O(a)*b(a)
- R$ O/ ?( k3 O* h8 n假设实际投注回报与期望投注回报相等1 e: o! B- l9 d4 g0 E: \
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)4 H: x' o" e9 [% a# O! Q$ b+ Q! I
O(h)*[P(d)+p(h)]=1; O3 n9 Y# w/ `! p" d+ _
O(h)=1/[P(d)+p(h)]+ o; }* p# c! R" f
E[R(2)]=P(a)*O(a)*b(a)=b(a)
. V! u8 b! h# s+ s# p+ g/ u! q4 [4 VP(a)*O(a)=1
- ]: e+ M% M* g0 p( b, t. L UO(a)=1/P(a)
1 F4 T: ?2 k/ _# O. q1 w$ _$ ?6 n9 ]同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率 N: L; L: |7 d( D. p
O(h)=1/p(h)
9 g, u. u% a5 F0 B( P4 nO(a)=1/[P(d)+p(a)]& }$ k- `8 l7 ], V
四、平半球盘的计算描述
" K: W( U& B0 j) g这个稍复杂一点" t" C' }! x# x9 ~+ _9 j# Z2 |
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
; P& n5 G3 d. 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:, F( {& ]! i) q
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
1 ]- ^. o0 J* C# PR(1)={O(h)*b(h), 即上面所述的A(h)结果发生3 ]7 I( B! z' m7 a/ u2 |
{0, 即上面所述的A(a)结果发生
; J9 E' D: P7 n. N+ B. @以及0 G- ?) H+ d, r; F2 @
{1/2×b(a) , 即上面所述的A(d)结果发生2 k+ {* W L# [1 Z
R(2)={0, 即上面所述的A(h)结果发生4 R% j: e2 M. H- S- u% V8 V2 g. l
{O(a)*b(a), 即上面所述的A(a)结果发生( e) h9 Z U& A2 P
投注主客的期望回报总数分别为
" ^0 J9 W# o! W9 vE[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)); E; X) }, x) d' Y% \3 j" Z
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)] s7 r8 e U' J; U) N$ \" B& N
和上面计算过程相似,得出:& ?9 F7 u$ ? F [
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)% y; |- Q/ ~$ \ N
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1* Z2 z4 o* y+ k8 x" R% d6 M @
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=11 H0 v# p2 O' ~
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
* `6 Q+ W$ q/ l! D O0 `E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
" U. N ]: M+ H: l+ \1/2×P(d)+P(a)*O(a)=1$ ?2 I7 q9 m7 R1 S- V4 K
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
) s* d; B$ Q2 S8 g* S. F8 P0 A同样主队让平半就分别是
2 ^: [, Q2 i7 [: `O(h)=(1-P(d)/2)/P(h)
5 G+ G M( ?7 k4 eO(a)=(1-P(d)/2)/(P(d)/2+P(a))
* [. k+ ?( @- C, Z. _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) r( O& y$ D! S& N" S
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 a1 q8 W% u* `+ g, p
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
% Y7 z# `7 T( v: ]B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
$ {$ G, C# t. D( T) C+ p- PB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数% v9 I, {# ^# o4 N: u: n7 A
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:
' f- C ~% L4 Z, \5 P{b(h)*O(h) , 即上面所述的B(d)结果发生
+ ~ Q+ `2 \* h; NR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生9 U9 t5 I. }- |' Z
{0 , 即上面所述的B(a)结果发生
2 D/ y& n2 c/ @3 ^* b) I5 t$ D以及" K( \: j6 ~$ j: Z/ e: P$ r
{b(a) , 即上面所述的B(d)结果发生
; w1 }& P- p. f: }% e5 ?. [R(2)={0, 即上面所述的B(h)结果发生
0 N" q2 E; v6 \( Y{O(a)*b(a),即上面所述的B(a)结果发生& C' E ?# n F- b5 `0 x- ]
投注主客的期望回报总数分别为
. A# s" x; t6 e/ |& r- 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)]; k+ J* e( J2 f$ }' F2 T# 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))" K7 Z3 I! i& c
假设实际投注回报与期望投注回报相等- v0 J* e0 z; V7 f/ _. S8 m0 ]" m
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)( u3 ^1 a( j' U; v/ ]3 [
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
! S2 Q( w+ ]8 f; k' S- W# C/ A3 IO(h)*(P(h)-P(h1))=1-P(h1), O) H2 e' s7 E$ |0 A" P
O(h)=(1-P(h1))/(P(h)-P(h1))
- a% P: k9 ]. l* wE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
, \7 u; s; ?/ ]P(h1)+O(a)-P(h)*O(a)=1* O x- l" U: O, b5 a
O(a)*(1-P(h))=1-P(h1)7 b7 u% [# c1 O" H9 V
O(a)=(1-P(h1))/(1-P(h)): q5 |8 \6 \. D. j6 k% M
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。. q5 W# s" B6 S! v) _
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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