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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。
1 ]( F* n/ E9 H) h那么,平局、主胜、客胜就有以下表达式:# d( M! |1 E& O. e5 u7 k3 x& @
A(d) = {W(ij)|i=j, i∈N, j∈N}1 Y) C& g8 p: I- l" a4 a
A(h) = {W(ij)|i>j, i∈N, j∈N}
7 C4 V- e. Y/ M" C2 n( H# FA(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 h; m3 z2 o
P(i)=P(Ai), i∈{0, 1, 2}
6 q; z2 D2 f; V* d; L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)8 j- n1 K$ o+ j4 B4 O# c8 ?
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 E* ?2 P: E A% _/ [{b(h) , 即上面所述的A(d)结果发生5 Q' U9 B' ?. D2 |2 U
R(1)={O(h)*b(h),即上面所述的A(h)结果发生4 {8 V" v# n' n
{0 , 即上面所述的A(a)结果发生
`. ^0 L) Y2 v/ I1 h& q( Q以及
: U& i! p; V8 x! r{b(a) , 即上面所述的A(d)结果发生
" R* e) m7 w* h' P" y/ t) p! LR(2)={0, 即上面所述的A(h)结果发生$ o6 F& W# p, P5 P. w2 C
{O(a)*b(a),即上面所述的A(a)结果发生0 b3 I! Q& v+ e* H6 {
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6 b' j% i* R4 n6 ` O, r- } i
那么投注主客的期望回报总数分别为
6 i" p! _# f Q9 J) J; vE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]1 \, f8 U, y: O- C
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]" o% k k+ |9 ]$ _( y* L: n$ |
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
, B+ r0 c4 x+ L" j1 wE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)" H3 o8 B+ @2 H8 ]: {/ L) r
P(d)+p(h)O(h)=1! [5 S4 N* }& y) @' S
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
+ h9 D7 c' S$ Z, ZE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)/ K* G9 x Z0 X5 ^
P(d)+p(a)O(a)=1
, W3 q2 N' B! ?5 DO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式% u, A! l7 L& X, F
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
; I5 y2 V& ^7 U, Q三、半球盘的计算描述: u: t; ~0 x$ c$ ]
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
" o3 N3 P( q- 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为:& I3 r- J# @# B7 l+ x1 T
{O(h)*b(h),即上面所述的A(d)结果发生
4 J" I0 s3 l& E% M1 ER(1)={O(h)*b(h),即上面所述的A(h)结果发生
2 i J6 g2 |# C; E9 i{0 , 即上面所述的A(a)结果发生, c. z: ^8 h9 Z% k$ |
以及1 [# ^4 S0 ]$ P8 k
{0 , 即上面所述的A(d)结果发生
j" W# `7 k. w/ w$ R" a( CR(2)={0, 即上面所述的A(h)结果发生) ~- x; n2 c7 P
{O(a)*b(a),即上面所述的A(a)结果发生
& x2 K/ F9 _& }* M3 G4 @) H如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
! m7 K" h; W1 [" o; h& I投注主客的期望回报总数分别为* y! u" A. f; P
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]/ U" ^; q# i3 f
E[R(2)]=P(a)*O(a)*b(a)
7 H: r- J, `- X/ I# m假设实际投注回报与期望投注回报相等
; z; z" ?# F+ dE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)& l; K' Q ~# x" s
O(h)*[P(d)+p(h)]=1' l* q5 G& I" c' `$ n. W( C0 r$ J
O(h)=1/[P(d)+p(h)]0 c6 ~1 V2 \, E9 l
E[R(2)]=P(a)*O(a)*b(a)=b(a)
7 K7 i& p* [/ r5 ]P(a)*O(a)=1 |1 n1 Y3 V0 R: s
O(a)=1/P(a)# t/ ]5 B3 B! ]( N+ P- \
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
: R d2 }% `; \1 U; b, f9 v, u; FO(h)=1/p(h)
) I$ F; m1 ~; a- W3 b t; x+ b- yO(a)=1/[P(d)+p(a)]
9 J* i! Y$ w+ ]- |; c四、平半球盘的计算描述
1 c @, i3 F: M! H! P& j这个稍复杂一点! F& N) L$ F# V! W0 c
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
" D; ?1 @! b- l: g0 P, 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:$ ~3 D2 K8 s% G9 y" Q8 m
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
# N% m; D: M, q! X. m& r. v% b% PR(1)={O(h)*b(h), 即上面所述的A(h)结果发生' P* ]: H2 r6 o) g! Z
{0, 即上面所述的A(a)结果发生) g5 ?$ M8 B. J$ @4 X W
以及% `( U5 g8 R: `6 T! B( L
{1/2×b(a) , 即上面所述的A(d)结果发生
. D" o. T: w g+ P' O; ?R(2)={0, 即上面所述的A(h)结果发生( z- @: p0 L3 H( N2 U4 F
{O(a)*b(a), 即上面所述的A(a)结果发生
; A. p" f6 i6 d+ Z# f投注主客的期望回报总数分别为
/ l3 M6 \2 s6 A7 B4 `1 V6 eE[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))
5 C1 I1 o8 s7 E9 DE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]$ }- D( k$ w0 e% r u; B
和上面计算过程相似,得出:
M5 z/ o) ?, s9 L8 d0 G! [4 GE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
. l% X) p0 Z X2 fP(d)×{[O(h)+1]/2}+P(h)×O(h)=1
0 ?+ h8 Q0 T# N1 g+ KO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=15 o6 p) p# m- ~. W4 z3 E8 Z
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
; I5 `7 A/ b/ c2 @ ]; z2 uE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
' f3 z: F% T: i/ v; F/ j1/2×P(d)+P(a)*O(a)=15 @& C2 e8 [& W) @' Q& _) a8 G
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
* X( [0 [, I4 I: p3 N同样主队让平半就分别是; v5 |9 K# F7 q' e8 a i0 a$ r+ K0 \
O(h)=(1-P(d)/2)/P(h)) ]. v- `% B4 H- Q7 R' P
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
* h4 m. o! p2 [$ X6 D/ c0 g9 ?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) I* y- Z7 w6 C: g0 M
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" C. W! ~0 C& O+ \7 ?) _: B
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
+ x- Q2 f3 x3 R' z7 [5 p) T6 S% t1 CB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}" O* i4 X( d( w* d6 B- M
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数% u, k% \, H9 y' ~! `, j
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:, o1 |& f9 Z( d
{b(h)*O(h) , 即上面所述的B(d)结果发生; @, M) Y1 W v2 ~6 V
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生' x" \5 h5 `6 D, c8 D
{0 , 即上面所述的B(a)结果发生
/ Q" p3 U* \' H- i9 Z% d7 _以及
# A, N* U. v7 F. ?$ w: t# b+ O{b(a) , 即上面所述的B(d)结果发生
1 y) E) N5 V0 v( R# @R(2)={0, 即上面所述的B(h)结果发生
( H8 A m, V5 m{O(a)*b(a),即上面所述的B(a)结果发生
8 k1 s o6 _+ C+ n' u投注主客的期望回报总数分别为# h3 h( l0 R; }/ O0 B7 e
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)]) U+ [2 }! D0 O/ L6 {
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
5 W3 g/ \% E7 M7 S) a假设实际投注回报与期望投注回报相等
( h, H ?, d9 IE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)- C9 d2 M: ^. @7 B
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
, z( u) E+ }8 K" I7 qO(h)*(P(h)-P(h1))=1-P(h1)1 ~, R& Q# _2 {$ x) \+ S
O(h)=(1-P(h1))/(P(h)-P(h1))
) j. d3 S% |* X! y3 s& pE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a), k+ L0 J0 z4 W1 A& U
P(h1)+O(a)-P(h)*O(a)=1- r) I$ ]7 q3 E5 A H0 y
O(a)*(1-P(h))=1-P(h1)
6 w: U! D, y; {& P: M5 G$ [O(a)=(1-P(h1))/(1-P(h))
5 X E+ L o' Y% L' D, r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。
( z- u: F& x" l: q5 @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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