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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。7 `2 W* ], J- H
那么,平局、主胜、客胜就有以下表达式:
. \ {& D+ R: X* w( V" hA(d) = {W(ij)|i=j, i∈N, j∈N}
+ u+ b8 ~- ~3 C, yA(h) = {W(ij)|i>j, i∈N, j∈N}
' ], i( _' V. H0 F$ `' x( f* `- yA(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]:% j1 r# c5 N g0 A& Z4 z& V( Q" s
P(i)=P(Ai), i∈{0, 1, 2}
/ m8 q1 |5 K5 B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)# r3 n. t. J _
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:
: b4 p* b% V& `# H1 _) H5 ?{b(h) , 即上面所述的A(d)结果发生
5 E/ W' o1 y% d1 Y8 }$ LR(1)={O(h)*b(h),即上面所述的A(h)结果发生, [) F; J' c! b! Q9 Y
{0 , 即上面所述的A(a)结果发生
+ h' O W0 j& I+ T& }以及; z8 @; D$ I( M/ M
{b(a) , 即上面所述的A(d)结果发生
: h3 L2 j) ~% {5 M! C; q+ S* DR(2)={0, 即上面所述的A(h)结果发生) D) V* b4 B( G& U1 Y
{O(a)*b(a),即上面所述的A(a)结果发生( O% Y$ C2 X/ k( @7 `
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: |( F' s1 S, X) v+ N
那么投注主客的期望回报总数分别为
) h( z: ^1 W8 C2 k1 `! u& b! \* F- E oE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]# ]0 Y* U& S2 K! _$ C
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
& H* |0 s6 Z, }0 F4 w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0 t: n$ `( C( t+ X3 o6 q
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
. u. n" i# @* v5 l+ n/ nP(d)+p(h)O(h)=1( y' D' M/ V, M1 L
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
5 `/ |( P6 \# N' p4 J/ mE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
" J- R! f* i6 @ @) U, ^. UP(d)+p(a)O(a)=1
& U& W$ C: H# ]% i4 T/ _% yO(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, f3 B) C, j! N# E, U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% e% H' G5 s4 j* j
三、半球盘的计算描述3 V, {! ?$ ]& Y. `- e
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况); J( R5 s9 l5 Y, @5 B
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:% g8 v3 f( W7 I4 n
{O(h)*b(h),即上面所述的A(d)结果发生. |! C- b+ v, c4 O
R(1)={O(h)*b(h),即上面所述的A(h)结果发生1 j0 y3 t9 n7 P/ i
{0 , 即上面所述的A(a)结果发生
. D) E% M& z8 F9 k$ U( u" s以及
7 A4 d. Y1 O2 |& h% X ^& |5 R{0 , 即上面所述的A(d)结果发生0 x0 x; E* ]7 p @
R(2)={0, 即上面所述的A(h)结果发生% \# n% A' h7 v/ @) G) S; p. f
{O(a)*b(a),即上面所述的A(a)结果发生3 c# O. r2 A0 E/ 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
* ]* t+ t7 O% N6 g9 S- v9 I投注主客的期望回报总数分别为5 W# B/ Q) [; V
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]6 k4 `. y. y) P5 ]9 ]0 o
E[R(2)]=P(a)*O(a)*b(a)9 c: K5 a: h* Q1 T- ~& @
假设实际投注回报与期望投注回报相等& a. E1 W A2 g+ U
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
; I( ^6 j2 p) dO(h)*[P(d)+p(h)]=1# }# F2 w* } P& R% K# x) W
O(h)=1/[P(d)+p(h)]
: }$ y% m% n1 D' e, |/ P2 j* fE[R(2)]=P(a)*O(a)*b(a)=b(a)
! Y- a) i/ b* u: O* n; i' a& J. l. qP(a)*O(a)=1
|; d; X% P; M. J' w3 SO(a)=1/P(a)) P. H' I* m! j: V
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率2 L9 I( {' o- c& B
O(h)=1/p(h)
) {* n$ f: s, H% AO(a)=1/[P(d)+p(a)]- h# _2 i& a2 p6 T' b
四、平半球盘的计算描述
* N8 j: O% _) C9 D% S+ E1 V m这个稍复杂一点0 c# v( ^5 {4 S8 o
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)& E' Y5 ?1 r# c T$ }$ ]& z
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:
) N$ T8 U- Z" z# w& c6 E{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
- ^' T9 v6 F vR(1)={O(h)*b(h), 即上面所述的A(h)结果发生; R3 Z, e$ B( o
{0, 即上面所述的A(a)结果发生
9 V0 j/ t+ ?" q$ D7 o以及 h( _3 O) M5 p0 p" T
{1/2×b(a) , 即上面所述的A(d)结果发生! h H# V9 i9 X
R(2)={0, 即上面所述的A(h)结果发生3 T) F+ l4 V2 ^' S/ X: L
{O(a)*b(a), 即上面所述的A(a)结果发生1 o; I# [2 z$ p) H. K6 J
投注主客的期望回报总数分别为- F1 B, [, n$ n' V
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))! Z3 E; `8 [1 ~5 Y
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)]1 Z- e) f% x: \# e* D( |
和上面计算过程相似,得出:
7 b6 w* |& z) f" zE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
2 b! g" z% E8 }% l G% EP(d)×{[O(h)+1]/2}+P(h)×O(h)=1
7 D8 P! K: E$ H8 M' s1 K! P" V( {O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
! e- \' n3 W# ZO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))* z% ]+ @" I8 ]6 L% l% w0 m) |- G
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)- x& S: Y. @' q o& K$ N- O$ `
1/2×P(d)+P(a)*O(a)=1
: Q0 J2 R( Q( D( XO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a); c2 O6 z; ]7 _* u. u
同样主队让平半就分别是. N5 i5 n0 `# v) c
O(h)=(1-P(d)/2)/P(h)( B4 K o* ?" K7 m% E# q1 O
O(a)=(1-P(d)/2)/(P(d)/2+P(a))- E# A3 e0 H h1 `1 s
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) @% ]/ i1 P/ a! g Z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3 X% ]+ ^- G. ^- e. |% [: W
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}2 H- T$ z1 t' x) ?
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}9 l2 `/ F) i# p
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数 R0 u; V$ k. ~1 x& [" V9 u
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 |9 l# U/ q/ P" P j1 f{b(h)*O(h) , 即上面所述的B(d)结果发生( c7 L, ^4 _8 `3 D7 @0 G' x
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
" v$ @6 }5 N! ~4 V7 F5 ]7 r{0 , 即上面所述的B(a)结果发生7 k( F! `0 l: F" L0 [
以及8 \* q7 V3 G9 L# j$ c
{b(a) , 即上面所述的B(d)结果发生
" g( B0 P( m$ [; dR(2)={0, 即上面所述的B(h)结果发生
/ L2 p- z* n' `+ T. L v* z{O(a)*b(a),即上面所述的B(a)结果发生; ^) M4 V2 u+ |$ m; {
投注主客的期望回报总数分别为
+ Z2 D5 m ~6 n# O: l' j5 JE[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)], \! k2 f1 y# I/ U- M
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
9 w5 Y& `# ?- J3 {! u3 N, t; Q# h假设实际投注回报与期望投注回报相等
8 p/ Q( s/ g5 FE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
4 X! a% @4 f9 E4 C( _! DP(h)*O(h)+P(h1)-P(h1)*O(h)=11 {2 M, l" U# h- E8 f( t
O(h)*(P(h)-P(h1))=1-P(h1)2 K @# }. |8 M8 y4 a
O(h)=(1-P(h1))/(P(h)-P(h1))
& S5 Q: Z8 J, l. V, [E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
: E* D( L3 ^" P4 nP(h1)+O(a)-P(h)*O(a)=15 P6 U$ s9 p4 V j/ R7 d( ]
O(a)*(1-P(h))=1-P(h1)
2 T; ^" S6 {% W) B6 K; m6 EO(a)=(1-P(h1))/(1-P(h)); g8 }* F; d9 ]: H' [8 z- Z9 a) ^
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。
4 [ E! p T. E; R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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