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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。
4 Q: Q( Z# R1 Q那么,平局、主胜、客胜就有以下表达式:/ v5 ]3 g$ |6 X8 u8 A
A(d) = {W(ij)|i=j, i∈N, j∈N}
6 ]; ^" F4 v% p' Y* CA(h) = {W(ij)|i>j, i∈N, j∈N}( b( k9 I. h* `1 u
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]:1 \( q% _; c- _6 a1 z* }% t% C9 s8 y
P(i)=P(Ai), i∈{0, 1, 2}( B0 W4 @. k5 K/ m& C& `& E9 J0 V+ _
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 U7 H+ @7 S, H* j* a# W& e8 O8 q4 V: N
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:( K# a( U; |; y& c% y5 K) i
{b(h) , 即上面所述的A(d)结果发生
1 |$ e5 v6 l, bR(1)={O(h)*b(h),即上面所述的A(h)结果发生
" X% D, G7 X1 b{0 , 即上面所述的A(a)结果发生
# H* v/ f; h, R: m; D! q' }以及6 x0 f: T O1 F; M/ z
{b(a) , 即上面所述的A(d)结果发生
; n! ~# y" @$ h& RR(2)={0, 即上面所述的A(h)结果发生- w, a$ M" o& A' _9 s4 S( F
{O(a)*b(a),即上面所述的A(a)结果发生
$ R, j* ^# ^% M7 ]! y& y$ 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
1 y: S( d4 j3 e' H" ^% Y那么投注主客的期望回报总数分别为# H: h7 d& k+ O G
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
4 p) S" }0 S) [! RE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
! p% \: f4 B3 Q; D# U2 v, s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7 b" P- r6 e! T. ~* \
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)( Z) ^/ A: c7 D, w$ H6 O
P(d)+p(h)O(h)=14 Y% @, j) Y) U0 ?, r
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
2 j. n" [# ]) m6 T3 a* nE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a): {$ k$ h8 P7 j! I$ Q; B" m v
P(d)+p(a)O(a)=1+ t$ }, o) }7 }4 |
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, x. W8 y4 P8 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4 i" I. y1 I y' f% `# h. n3 O
三、半球盘的计算描述
b9 j+ Y" w, W/ x; _ i+ ^; L- g/ {接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
. |. d5 O. T7 C8 F! F+ c1 e! 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为:
4 }2 x6 j- F) U! F& t{O(h)*b(h),即上面所述的A(d)结果发生( a& J0 O. r& \- n; v( c( ?) O9 m
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
D7 U; {1 h. \{0 , 即上面所述的A(a)结果发生$ E0 D- y) H: Z3 G
以及+ n6 R- P1 h" F% A% `% r; |3 @
{0 , 即上面所述的A(d)结果发生
4 B. }, S2 I1 |- l' S) p' k, qR(2)={0, 即上面所述的A(h)结果发生$ j- T/ |2 j: V0 I4 C
{O(a)*b(a),即上面所述的A(a)结果发生8 a8 n+ R8 a+ o9 F9 U
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
& O6 k3 E7 `9 w) |! p投注主客的期望回报总数分别为
7 e' e* C) h, T0 }) F+ sE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]3 K4 S1 U7 w4 Q* l
E[R(2)]=P(a)*O(a)*b(a)
9 m, f! d1 M. u& X( L假设实际投注回报与期望投注回报相等6 I3 C1 O6 w: k( u( [
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)( e8 M* L/ J8 O0 e( K/ @0 |; W/ e; c
O(h)*[P(d)+p(h)]=1
4 m9 u; v4 g) V9 eO(h)=1/[P(d)+p(h)]
6 d: W, n/ P* [2 R m+ a! L" {E[R(2)]=P(a)*O(a)*b(a)=b(a)9 ?8 G" D: A8 Z
P(a)*O(a)=10 w/ @( Z2 E5 M
O(a)=1/P(a)
0 d3 d }0 U g- J$ t8 F2 c同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率5 K3 W+ U3 x2 Z8 x. M" G
O(h)=1/p(h)
4 @6 p8 {9 {6 DO(a)=1/[P(d)+p(a)]
3 T. I3 A' n( r' B. s四、平半球盘的计算描述
# A5 ]1 t! z/ I+ F这个稍复杂一点
% [0 a, U3 r$ R7 M9 O$ i2 c2 [; I接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)2 O& [ z- P# @
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:$ @" r2 d& G( Q
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生$ @6 ]9 H' S# q7 T/ [/ f
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
5 N! x) \6 {" x* _- {' ]3 _{0, 即上面所述的A(a)结果发生6 e* P" V! z8 P1 V- C- Q9 o
以及
9 J: x+ q T1 K, x{1/2×b(a) , 即上面所述的A(d)结果发生
6 V7 V+ l% m" P: {6 j8 F, ER(2)={0, 即上面所述的A(h)结果发生: J1 R( A3 m% ]2 p9 H: Z0 ]& ~
{O(a)*b(a), 即上面所述的A(a)结果发生$ f ]$ [8 @+ \* ?- O3 T6 i1 g
投注主客的期望回报总数分别为1 h! K9 u b. [2 L
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 N$ W9 c: P2 z7 O! rE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]
/ T0 H5 o. F- t( m" V4 P; l和上面计算过程相似,得出:$ r3 q' E+ c# [$ z" j
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)* F# F; j6 D- u0 H
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1& E$ P1 }# B9 c; Q8 R
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
4 Z) v( F) @) Z" P* p# Y4 D; lO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))9 F& d6 H; A8 a" Y" q% i
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)! e' h% {# w# u6 k
1/2×P(d)+P(a)*O(a)=1
1 r' P5 Z0 z% r& \2 v# CO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
* P5 |8 P$ o! j4 ]' ~' i i同样主队让平半就分别是$ e8 L+ i! q/ b4 R: u2 T0 X$ S% m
O(h)=(1-P(d)/2)/P(h)
% D- ~' z7 I8 Y. C' `O(a)=(1-P(d)/2)/(P(d)/2+P(a))' T8 j+ A) w# v1 U/ u' 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)
5 e- {$ V4 p' D3 i 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
+ l; s% H: `+ \# l" s1 [B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
6 E, W8 r& n* N: NB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
l+ m2 |% O/ D: SB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数! v W( f4 N$ x8 Y
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:
0 R8 `% ~# m5 c8 }+ b/ q; j( s{b(h)*O(h) , 即上面所述的B(d)结果发生
; O2 f: [! b9 k1 d1 v- ^R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生7 Z9 C: i: [3 N0 }9 d; X
{0 , 即上面所述的B(a)结果发生# e6 m8 `$ u h9 t
以及
$ b! B- t6 s; f6 h: X& k{b(a) , 即上面所述的B(d)结果发生
! {& s* A5 s& |' oR(2)={0, 即上面所述的B(h)结果发生
8 K. ^' O' w7 H6 [' F0 j{O(a)*b(a),即上面所述的B(a)结果发生, c$ d9 i* L6 v6 U8 C' ]
投注主客的期望回报总数分别为( W" K: s, e7 K6 ?* P
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)]
( a2 N' Z' t2 T f( D! mE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
# r4 B6 @3 c; U' J, d假设实际投注回报与期望投注回报相等
( p, ?* U3 ^5 m/ XE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
5 X* N7 J5 H9 q6 ?# YP(h)*O(h)+P(h1)-P(h1)*O(h)=1
9 p C6 A; P# E! k1 VO(h)*(P(h)-P(h1))=1-P(h1)( c7 ]' x- a2 R
O(h)=(1-P(h1))/(P(h)-P(h1))& ]9 o: X5 N/ A: ?6 D
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
2 \( j- T# V! vP(h1)+O(a)-P(h)*O(a)=1: g) J0 F9 q% @
O(a)*(1-P(h))=1-P(h1)
% }% e N3 X6 @* j3 B4 u7 r8 FO(a)=(1-P(h1))/(1-P(h))
* T0 T1 a" o% Z. x% N% [! ^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。- h- j3 |4 s4 u- 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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