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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。
, A" r1 }4 c/ e8 T那么,平局、主胜、客胜就有以下表达式:" ~4 i, h) g. y' p9 Z$ ]
A(d) = {W(ij)|i=j, i∈N, j∈N}
' U0 ]; v- X& w- C/ q* tA(h) = {W(ij)|i>j, i∈N, j∈N}
9 l9 B O4 x* K P) q3 lA(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]:
' K R% D2 W: G; V5 [9 [P(i)=P(Ai), i∈{0, 1, 2}$ a5 p; r( E1 D* J# t6 Z
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)( `$ y' z/ _6 t" I
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, x; {# {6 L& [5 d
{b(h) , 即上面所述的A(d)结果发生2 A1 ~- P$ W1 u# M* [3 T7 {% C
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
; t9 E3 u; I7 M }; q{0 , 即上面所述的A(a)结果发生
/ y6 f, n$ } X! w% E/ t+ n1 Y" {以及
/ H& T( U7 A' b6 H2 S{b(a) , 即上面所述的A(d)结果发生
! h4 ^; ^# l* N6 IR(2)={0, 即上面所述的A(h)结果发生: g' h- h0 e/ f4 H8 ?
{O(a)*b(a),即上面所述的A(a)结果发生
/ @- R, c9 a2 g, [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
$ ^+ e d8 ^$ b3 g那么投注主客的期望回报总数分别为
7 S1 D ^. ]7 |: c( |6 ]8 `$ j0 wE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]! m/ g# u, z* |0 s& q& Z0 N) S
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]+ C; u2 p4 _- D! w% ~) 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9 N& |; o; ^5 v" t) l
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
$ U0 u/ v" `- \) J2 Y1 l9 k9 sP(d)+p(h)O(h)=16 a4 b0 l. j0 G- t) X- F
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
1 Q/ Y5 _ Y/ v4 ?E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)6 E* \+ b/ e0 W% j7 W, B
P(d)+p(a)O(a)=1% |2 i- h- G$ D" j: r$ T- Y9 l( b
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
9 W2 G) X1 n$ c/ v g# x# w( I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
! S3 a& ~8 x$ G7 b' ^9 |% z3 g三、半球盘的计算描述
# H0 R9 j6 A7 f! e0 o/ ^# k2 \* R) k接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
# l3 n. B/ a; Y. N! C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:: B+ ?) \% {7 P4 ~
{O(h)*b(h),即上面所述的A(d)结果发生+ \1 u# x9 l7 o+ t" P2 l( D
R(1)={O(h)*b(h),即上面所述的A(h)结果发生3 A0 v2 L; g( B0 a
{0 , 即上面所述的A(a)结果发生1 p; y0 ~- @" _5 i# }* w* }5 [
以及( F8 M9 A, t( {' ?9 ] `- V1 C+ [7 {
{0 , 即上面所述的A(d)结果发生' Z$ e) k3 E' i) X# O
R(2)={0, 即上面所述的A(h)结果发生1 k; Y$ `% Q) f6 r/ g1 e) b
{O(a)*b(a),即上面所述的A(a)结果发生
; p( ^; p" j M" l |4 @) S6 p' 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" h! _/ Z: l0 Q
投注主客的期望回报总数分别为. f. v; m6 H/ Z% t
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]% b) i4 r# D+ w/ ?! B# q8 K" J
E[R(2)]=P(a)*O(a)*b(a)
$ u" o1 i: X; i/ p, R( c假设实际投注回报与期望投注回报相等
0 v- G4 b$ {6 k9 `7 K9 l2 x2 ~E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)9 j( N& G8 w# p( w) E
O(h)*[P(d)+p(h)]=1* [3 ]. y" Q7 K- n# b$ O8 g
O(h)=1/[P(d)+p(h)]' t, v) C5 B; c6 R3 U
E[R(2)]=P(a)*O(a)*b(a)=b(a)
. [) C' K* l6 _. h" iP(a)*O(a)=19 I% p7 F. O l
O(a)=1/P(a)
7 z( u6 l0 v0 `8 p, g7 a" }/ T! b同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
6 x+ y" L, n1 C1 aO(h)=1/p(h)
. R% W- T5 B$ z7 w: H3 L+ K" T! gO(a)=1/[P(d)+p(a)]
& R) W+ o6 _2 @0 L/ C; _5 N四、平半球盘的计算描述
4 w$ L7 w6 a. o( `+ N, J这个稍复杂一点
! w4 n6 I$ Q @0 D: B6 o5 R接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)) \5 j" t: W9 `+ X9 F9 R
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:
6 o3 N" l6 h# y0 d$ l, Y{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生# X# u2 Q: ^" G4 Q
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生4 f3 l6 a `3 o3 L, M8 x
{0, 即上面所述的A(a)结果发生& a. O- b8 J Y" }2 X. b
以及
: Z# F7 \% p; ]% A+ {{1/2×b(a) , 即上面所述的A(d)结果发生8 V& p5 J @# N- {
R(2)={0, 即上面所述的A(h)结果发生
. i5 A: {' @; N2 X* @9 I{O(a)*b(a), 即上面所述的A(a)结果发生
. Q+ @+ @ a2 t投注主客的期望回报总数分别为5 T. @# l6 M$ [' 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))- z9 A' j3 s+ [4 m6 x# O# z9 o2 a
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)]
! o# A& P$ `( ~! \和上面计算过程相似,得出:. h& o2 O; U0 [3 L8 d* n S
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h); l9 r) `5 K+ C& C( K3 j
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
& b5 k" B p! Y5 sO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1. @2 v& D o9 X# @6 P
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
! a3 l; l |: W' ^% l, qE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
% m. @( Y |/ i) k C1/2×P(d)+P(a)*O(a)=1
8 R; O% W4 c6 C" w* f! W4 a# C, rO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)" z" h& e. \* S
同样主队让平半就分别是
* B6 b/ }6 ]% d4 B( kO(h)=(1-P(d)/2)/P(h)8 z" J% h, X) Y5 L
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
2 i0 h5 r& k* 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)2 C* ~0 K' J6 K2 M( W
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+ H+ {, L% k; U
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
5 x: J7 y* p3 vB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}, o+ u4 ~: h( q# I
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数/ v! Q+ j! c; w A3 G4 K
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:% I7 I6 e% t3 ~, R5 t
{b(h)*O(h) , 即上面所述的B(d)结果发生
( Q f( A' E/ u; I u) K) JR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生& ?: C4 e6 S A% \6 M4 R! X
{0 , 即上面所述的B(a)结果发生8 B, |3 H/ s, c, y9 k' ~! z
以及
+ C5 h+ e- O$ j{b(a) , 即上面所述的B(d)结果发生, W7 o( j. S, Q% J
R(2)={0, 即上面所述的B(h)结果发生
0 ^9 P* n% T7 s3 s' q- s4 O4 q. s" ~ o{O(a)*b(a),即上面所述的B(a)结果发生
+ Q' E) s: P% S投注主客的期望回报总数分别为
% G. P. m! D* ?8 \2 p$ u- 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)]) N2 i$ P2 b! b7 p$ m6 M! d! C
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))# U: d- F" L! o/ X6 [
假设实际投注回报与期望投注回报相等- X' O, P: C% ?" _% X
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
9 A, Y B* ^% Z0 i; m uP(h)*O(h)+P(h1)-P(h1)*O(h)=1 y( o1 M0 C' H& }) E3 j
O(h)*(P(h)-P(h1))=1-P(h1)6 E% D: R8 u: L- z) c/ _
O(h)=(1-P(h1))/(P(h)-P(h1))
) ^% t6 ?% | g0 p- C: XE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)* V d% o& S# I% P& p
P(h1)+O(a)-P(h)*O(a)=14 C0 W* K0 F+ U S1 P- Z
O(a)*(1-P(h))=1-P(h1)% F4 b6 B. K% T9 E$ f8 L5 Q
O(a)=(1-P(h1))/(1-P(h))
+ X; f- S5 h6 E9 l$ g, _$ j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。
$ H7 @5 A" g8 ^7 Q9 v0 |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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