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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。0 E3 c: r1 F1 e4 ~0 K- D1 z( a
那么,平局、主胜、客胜就有以下表达式:% r, D9 Y2 @" W( Q3 e1 Q
A(d) = {W(ij)|i=j, i∈N, j∈N}
' B$ g/ ]5 J0 i9 e1 N" fA(h) = {W(ij)|i>j, i∈N, j∈N}: F( S3 R, H; `5 B; `3 k0 _+ N) o; J
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]:
. x5 i$ z; L: S5 B7 w! aP(i)=P(Ai), i∈{0, 1, 2}2 X* y: X2 f) d
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)
) K4 ~% v* i, b3 Q5 E6 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:3 \+ m; p$ P2 K m
{b(h) , 即上面所述的A(d)结果发生1 B5 b- K* r G
R(1)={O(h)*b(h),即上面所述的A(h)结果发生& m$ Q: V. p1 ]. F0 m2 L* [3 g* ]
{0 , 即上面所述的A(a)结果发生
' R, y7 A8 Q& ^9 [; o& E以及7 ^; b' {. t+ R5 o
{b(a) , 即上面所述的A(d)结果发生
. z- g3 F3 n: V; ]4 g. kR(2)={0, 即上面所述的A(h)结果发生
) m9 A5 u) _+ C9 f/ T{O(a)*b(a),即上面所述的A(a)结果发生
. v% k8 {' Z% d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% \% J- u3 m6 f8 s* U
那么投注主客的期望回报总数分别为
+ `8 I) v. K" n, bE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]- _0 e0 Z* K$ n+ K- l
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
% a' u8 P" H' K5 M7 c6 X) l9 O, {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
, I/ _$ l0 \2 G9 U% g- DE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
* _2 B. d4 z9 p [7 E- `7 x) PP(d)+p(h)O(h)=1
3 M( C( t5 {: Y! |( B- ZO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式% n. [; L. S. g8 M0 Y) M9 X
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
; r" i; g$ C: D4 e. O. pP(d)+p(a)O(a)=17 G! Q# ]! c( s' R0 u; g- l
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
* i$ x. U# ~1 X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- R% }. \ H4 A0 V2 Y+ H
三、半球盘的计算描述% a3 }& Y' j0 h, N
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
6 n7 M D/ C) | R% I2 }4 a6 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:
$ c1 j8 z a* L{O(h)*b(h),即上面所述的A(d)结果发生
2 M# m) C4 L3 m& P7 }; H* nR(1)={O(h)*b(h),即上面所述的A(h)结果发生4 W+ d0 z7 } g3 b5 E
{0 , 即上面所述的A(a)结果发生) b5 G' p+ p. l9 D
以及
' e9 K: e6 [ b& D{0 , 即上面所述的A(d)结果发生( k" F3 M2 ?1 a( X4 U
R(2)={0, 即上面所述的A(h)结果发生2 i* a3 R, {% W/ W
{O(a)*b(a),即上面所述的A(a)结果发生' a( `6 q: [4 D$ C! c' Q4 F' v
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
! X- X& f) Y4 j3 a投注主客的期望回报总数分别为- G/ n8 u' E+ ^/ [% Q( G% O
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)] a8 S: L$ K" f% B4 M u
E[R(2)]=P(a)*O(a)*b(a)- X5 z3 [7 D- N( S. g2 y1 Y
假设实际投注回报与期望投注回报相等, ]5 ~% P* C. Q; ?# L5 q
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
4 C2 T2 K# a% |- JO(h)*[P(d)+p(h)]=1# l5 p3 \' c" J: c1 W
O(h)=1/[P(d)+p(h)]/ i5 O4 q' H3 D8 { y
E[R(2)]=P(a)*O(a)*b(a)=b(a)
* O; o. ?6 s! Z' y# `' Y+ U+ WP(a)*O(a)=18 ^7 x" a3 b. G+ m8 C9 [
O(a)=1/P(a)+ `" O0 N7 ]* T+ \
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
% Z. a B9 [ X! l- RO(h)=1/p(h)1 `+ P2 i$ V) u! M4 a8 r
O(a)=1/[P(d)+p(a)]5 i p9 v: w% W7 {0 ~6 X- r
四、平半球盘的计算描述
T/ g( p/ g! }3 k7 J这个稍复杂一点
" S5 F! `! O4 P. P; u# J [接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
7 L( j8 r) a* P( A0 a; N( \* 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计算:$ D# V" I8 A: H5 X+ E
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生$ J5 U" A# e4 i0 C+ e9 ~: H1 o
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
9 X6 b# ]& Y- M l{0, 即上面所述的A(a)结果发生
% u0 h _: B$ |1 n- f# u以及
3 }; ^* L5 i- B4 |+ Y- C{1/2×b(a) , 即上面所述的A(d)结果发生
% v* C7 a: d7 m' a& e, M7 hR(2)={0, 即上面所述的A(h)结果发生% C7 a1 [' X9 V! C- K( q
{O(a)*b(a), 即上面所述的A(a)结果发生5 M7 @1 Q; N1 m+ L2 S
投注主客的期望回报总数分别为
}3 r$ P, i3 H. W) ZE[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))
! J$ y: I! D/ p [, U( `1 {) UE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]
4 `) ?0 z6 [" O# A2 n- Z! q和上面计算过程相似,得出:
1 h( i; D2 c+ |9 a$ r, `$ u! k; ?E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
! B( Z# ], V+ Y+ QP(d)×{[O(h)+1]/2}+P(h)×O(h)=1
6 v7 A& ^! [3 ?. `' E5 `8 xO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
+ _ x( ?, V3 F( N! h6 S, pO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))+ Y: B% L$ M" Y4 z2 ^' k! k0 n
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)2 q' ~4 X! ]7 ^# b6 T. T
1/2×P(d)+P(a)*O(a)=1+ u8 L; f8 K" m* R
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a) A3 s. G2 |5 c2 Q
同样主队让平半就分别是! v0 y) d/ t0 ~7 `! @% l) H
O(h)=(1-P(d)/2)/P(h)
# w, q5 l4 R* _5 d% G+ qO(a)=(1-P(d)/2)/(P(d)/2+P(a))
' V& [* h; O/ 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)
/ x& Z' X, n% @5 w9 O7 P* b/ R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; Y! w0 B* l" g3 f
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
8 ^+ g% T" \) ~% r4 k! x" j7 R/ ZB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}! |- A& ^8 K8 O" {$ O n7 r. D W
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数& K; ?5 O3 M: {: w
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:! J, d1 T, u* l7 Z/ E% Y; X+ Y
{b(h)*O(h) , 即上面所述的B(d)结果发生$ u7 x1 e1 ~6 t/ F5 C$ U
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生4 u1 X# u) n, g& H1 J* p
{0 , 即上面所述的B(a)结果发生
% a+ g3 d0 v. `1 S以及
7 D2 }. \, x7 v. H- B- d$ K( S{b(a) , 即上面所述的B(d)结果发生8 Z0 z* i" C2 d+ D. [
R(2)={0, 即上面所述的B(h)结果发生
1 u+ U' T _, G% _; o% `7 ]3 v{O(a)*b(a),即上面所述的B(a)结果发生5 p$ H* O- |) k8 a E
投注主客的期望回报总数分别为! O- j9 M4 E! y
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)]
2 j7 @& O7 J$ T2 K U7 nE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a)). E% Y9 k+ W+ X
假设实际投注回报与期望投注回报相等3 b% \1 B2 r& R; h0 j5 V0 T& V
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
( b& j( } V$ Q0 |# y# G8 ^P(h)*O(h)+P(h1)-P(h1)*O(h)=1
8 M6 L4 x' T/ ~O(h)*(P(h)-P(h1))=1-P(h1). Z g! Z) r/ X' G( X2 d' s2 P3 u0 h
O(h)=(1-P(h1))/(P(h)-P(h1))
) Y4 w3 b9 z2 [4 DE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
; A, [6 ?" D- V! n+ N$ gP(h1)+O(a)-P(h)*O(a)=1$ H" Y' J6 s+ X! Y
O(a)*(1-P(h))=1-P(h1)0 O. h2 T- j0 n
O(a)=(1-P(h1))/(1-P(h))
9 E" [- ]: E" [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。
/ E& ]- d; b3 c J& e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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