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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。( D, ]0 M, I8 Y0 V) y4 e* t. H( q
那么,平局、主胜、客胜就有以下表达式:
8 T! k. O0 u+ ?8 v R) rA(d) = {W(ij)|i=j, i∈N, j∈N}) d: C: f" M2 w1 X! c8 n
A(h) = {W(ij)|i>j, i∈N, j∈N}0 r8 N0 p8 F- X* v
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]:# B( X7 v# R3 Z) s- w4 a! M
P(i)=P(Ai), i∈{0, 1, 2}
! [$ I: ^% }. f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)6 w4 u& n9 M: j3 B- y
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:* G( o0 Q6 q& H: U, T
{b(h) , 即上面所述的A(d)结果发生
0 g8 @' Y' p$ b' M8 v: x6 YR(1)={O(h)*b(h),即上面所述的A(h)结果发生
( O3 N( }; H$ I( s% O{0 , 即上面所述的A(a)结果发生 h" [/ C- }6 E
以及
5 ]5 B/ I9 o: S) Z3 r{b(a) , 即上面所述的A(d)结果发生) @; I$ m. `- c# x
R(2)={0, 即上面所述的A(h)结果发生
4 B% x* i6 p$ Q- x{O(a)*b(a),即上面所述的A(a)结果发生# I6 r+ @7 b1 N l" `+ i8 V
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
# t, U$ Q; x; h: O% j8 @那么投注主客的期望回报总数分别为
: c: k) s F- [+ x; xE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
& d; ?' I d: v3 e- ?E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
2 R1 V4 d! `9 J- d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" o, F; B) wE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)) _( [" M. ]1 ]
P(d)+p(h)O(h)=1
6 G3 f' J' `( C, U0 ]7 ?( E9 NO(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 g' o' \1 m- W1 m. lE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
: X3 b! ^* K6 O/ H J! m1 b6 B; BP(d)+p(a)O(a)=1" R- Z! b0 c* G! N* Z8 K# r
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
& D$ j n( e" ^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, c ^ I9 G0 {5 o
三、半球盘的计算描述' h/ Y8 ^/ d+ I$ f
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
( q9 t( n- C, n+ v: K& A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:$ L" j4 G. {" p7 k( d$ J Z3 u. e: i3 Y
{O(h)*b(h),即上面所述的A(d)结果发生
8 ^+ @$ `) j" o% x9 F! `R(1)={O(h)*b(h),即上面所述的A(h)结果发生 y7 `) o8 y6 q3 }0 N( @
{0 , 即上面所述的A(a)结果发生) P, Q3 _6 c1 O* ?% Z' o! G$ Q
以及
; G" ]+ @1 M# J/ }- E{0 , 即上面所述的A(d)结果发生
' F/ S# f4 W) m/ Q- g7 n! LR(2)={0, 即上面所述的A(h)结果发生6 p* i, Z5 t2 Z6 P0 b
{O(a)*b(a),即上面所述的A(a)结果发生3 m7 }" R5 _+ @" n
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+ i" o/ \7 a- D1 k9 k投注主客的期望回报总数分别为
# N& N) ~+ [( e, F% K0 DE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
) x4 R: x0 f/ A, }/ H+ fE[R(2)]=P(a)*O(a)*b(a)
1 I5 U9 ]3 ~$ g, x! S. ]) H6 i假设实际投注回报与期望投注回报相等 @5 u6 U5 v+ ?5 M/ r- Z+ s
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
; O' Z2 w& L5 p, e5 PO(h)*[P(d)+p(h)]=1
( h; ]- ?; }' N x/ L# _O(h)=1/[P(d)+p(h)]
# F9 ~8 @* \3 o" eE[R(2)]=P(a)*O(a)*b(a)=b(a)
1 I& e( \8 b2 Y- C$ E- K$ RP(a)*O(a)=1
! G8 C% y$ v$ c$ ~O(a)=1/P(a)7 `" Y; o- [6 A; ^ V! F
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率2 `: d. }2 j; P" L- T
O(h)=1/p(h)( y1 J# C9 v) R
O(a)=1/[P(d)+p(a)]/ X% X& }& E+ ]* G# F( G- s" \
四、平半球盘的计算描述4 ?+ c3 ?! t! F8 m2 R
这个稍复杂一点
i8 Q7 v5 M- b; b6 g0 o3 H9 b接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况) {2 H# I/ c- H0 t7 I' ^0 S
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:" W2 T- L( z) [- R
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
, F" @ w: Q1 h! d/ [( w, [R(1)={O(h)*b(h), 即上面所述的A(h)结果发生: q) i$ P7 l) c4 G: M
{0, 即上面所述的A(a)结果发生# m: Z& n4 d" G W9 i$ H3 n
以及- q5 X+ F+ I. {" n
{1/2×b(a) , 即上面所述的A(d)结果发生, ]! d ^9 B% A; \5 N! L
R(2)={0, 即上面所述的A(h)结果发生
( h" R" y& N% Z8 }. z( ^{O(a)*b(a), 即上面所述的A(a)结果发生
3 M. \- I( w' @- w! Q投注主客的期望回报总数分别为
8 \# o7 x% X/ G4 h" NE[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)) S' R2 G9 u/ W7 u# N
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)]
; _) u6 G% U: x和上面计算过程相似,得出:7 a- K- c) @/ s4 ]3 @& ~/ P( d- j
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)3 K( f. A& e2 l
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
9 j2 Z, t- @0 M0 H! ?6 j0 u9 X% MO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=16 d1 P# b# c5 q+ J+ X% |
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
+ Z1 I& v3 S. x7 lE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
2 J6 \/ n N( Y' S$ L, W1/2×P(d)+P(a)*O(a)=11 w" c3 F! J; K. k+ j' E
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
- J0 Y% f1 ?/ ?" z% t; N3 p5 f同样主队让平半就分别是
( C" e. R' A% f# W; K. ZO(h)=(1-P(d)/2)/P(h)
4 ^6 v' a; x# U/ Q9 c1 }, MO(a)=(1-P(d)/2)/(P(d)/2+P(a)). N2 R. S- d) v+ [
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. y6 O6 p+ i+ r2 W+ J
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
; e* D' M9 A' ^/ i3 d6 y: YB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}7 Q; q# J4 F; R4 Y, ]" j$ G
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}0 e0 q E' V/ c: \3 ?
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数* H, P7 A! x; v1 g K2 x, t1 q
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:
& l$ G# R0 X: o+ @) t W8 v{b(h)*O(h) , 即上面所述的B(d)结果发生9 p# b) L* \3 h: k
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
2 p' \4 R l4 f) W, \{0 , 即上面所述的B(a)结果发生
6 p5 Z2 Q+ @* u; c以及
0 H! ]* V( V& z0 @8 I( x{b(a) , 即上面所述的B(d)结果发生1 q2 ?# k7 L' o s
R(2)={0, 即上面所述的B(h)结果发生
3 y/ ~1 \# K/ u: L. S& {6 V{O(a)*b(a),即上面所述的B(a)结果发生. c# C9 w0 p! F% u. p5 Y- |+ K4 O% G
投注主客的期望回报总数分别为
9 G0 B1 T8 M. ^/ ^" xE[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)]
( Y1 A3 n0 a- A' F, FE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a)) t0 O* t6 l, Q' f9 I- E* Q4 w
假设实际投注回报与期望投注回报相等
% J% W: @8 w" D7 BE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h); r: O$ T) l5 s3 C# W9 D
P(h)*O(h)+P(h1)-P(h1)*O(h)=15 W" r& i. V- I
O(h)*(P(h)-P(h1))=1-P(h1)6 S0 s4 d0 [$ L6 q- y
O(h)=(1-P(h1))/(P(h)-P(h1))
F* V* k% h2 UE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
! @/ L N3 T1 A( A5 H. }$ lP(h1)+O(a)-P(h)*O(a)=13 k; l Y: L) K% R2 N: S
O(a)*(1-P(h))=1-P(h1)
, M/ h) r+ G9 \1 e* E, EO(a)=(1-P(h1))/(1-P(h))
7 d* X3 v* q+ H+ G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。
" R1 d6 O4 O" h# }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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