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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。
) s& u% N6 q+ n, r9 W7 K那么,平局、主胜、客胜就有以下表达式:
# X# p- ~9 @: {! {( [1 _$ jA(d) = {W(ij)|i=j, i∈N, j∈N}
4 I+ i& f' S8 p% s0 jA(h) = {W(ij)|i>j, i∈N, j∈N}3 h! S2 B4 s* R: M' S9 |
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]:
3 R& m* U k/ E1 j9 e$ a' dP(i)=P(Ai), i∈{0, 1, 2}% |. T( V w3 |8 z' d; Q
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)& d& K- E( c' [* b; N
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:% ]& @1 z8 B5 _$ @$ |( I5 [
{b(h) , 即上面所述的A(d)结果发生) p$ @% W6 A5 {
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
' J& u1 g" |. {' p" [7 {. E4 o- x$ J{0 , 即上面所述的A(a)结果发生! @& g/ N. _! M1 q( y
以及/ ^/ e+ v8 p7 w
{b(a) , 即上面所述的A(d)结果发生8 }/ f4 ~6 q& b$ {0 Z' r
R(2)={0, 即上面所述的A(h)结果发生
6 m1 b) s* ]* i; U' X' U/ g{O(a)*b(a),即上面所述的A(a)结果发生
# u q- v' Z3 e! f7 n% w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
+ G2 B( G: o9 J) o) _' f1 K, X那么投注主客的期望回报总数分别为
+ s) b1 \: } P, h6 ^E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
2 r+ n) Z3 U% }, q5 sE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
- _6 P& J; g5 u2 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
$ E# R$ _0 B& H9 V9 n% CE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)' W+ ?' h' J- P) _7 b) i+ g2 {, i
P(d)+p(h)O(h)=1
f2 N$ }6 g: m' JO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式
+ d9 X1 y5 d2 q! h uE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
" E7 M0 f, T" v/ r3 L# ^P(d)+p(a)O(a)=1$ }) J2 K* e1 y) 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
" }/ M- r6 D" v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' i. X0 f$ Q( k
三、半球盘的计算描述: n) w) o% t4 W+ t/ x
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
# X& L5 a, i+ ^+ l, c w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:
. h1 j3 T$ p A3 P3 M+ _+ ~{O(h)*b(h),即上面所述的A(d)结果发生
- V; { P* _& t0 e. kR(1)={O(h)*b(h),即上面所述的A(h)结果发生; U) q j/ e6 D( s' R
{0 , 即上面所述的A(a)结果发生$ `9 F w. a6 w4 u
以及
) r/ h! D' v" G. w6 U$ l1 S{0 , 即上面所述的A(d)结果发生: ?7 c& |- `( y
R(2)={0, 即上面所述的A(h)结果发生; R1 w* V! E; P z$ Y
{O(a)*b(a),即上面所述的A(a)结果发生( P- ]0 F9 W( B& O, {7 i
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
/ W! \5 b. c7 o9 N" f投注主客的期望回报总数分别为1 a( v* Y/ I/ A* @, r- ]0 w
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]$ S3 M" A/ O% S
E[R(2)]=P(a)*O(a)*b(a)! H( ]1 V/ {3 X% d7 D( q" Z
假设实际投注回报与期望投注回报相等
1 ]% |' i) _. E, ^E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)1 h# a: ^( ]4 z: ?
O(h)*[P(d)+p(h)]=1- V& x; M$ E. J# Y. v& q+ l' {2 ?9 }
O(h)=1/[P(d)+p(h)]+ R, b& L' m+ G( i8 V j- }
E[R(2)]=P(a)*O(a)*b(a)=b(a)- h* ?2 P$ G- q7 Q8 ^! k0 J
P(a)*O(a)=1
+ w5 I1 N+ Q1 r7 \! gO(a)=1/P(a)3 m' b4 b- q+ B* y/ y2 F6 `
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率( c7 E4 v5 F& X! Z2 ?
O(h)=1/p(h)$ `! a; f. R* C& M, }
O(a)=1/[P(d)+p(a)]
/ [+ k, a- A# M四、平半球盘的计算描述
$ s9 u( P; [, s# o这个稍复杂一点/ i2 b4 G/ y8 P
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)$ T7 j m8 `+ _' Q9 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计算:" C W4 V1 z% W% ^
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
# q0 z* ~! F5 ^$ A H7 Z4 yR(1)={O(h)*b(h), 即上面所述的A(h)结果发生
) T+ T' [! j% Q) t1 f{0, 即上面所述的A(a)结果发生
7 j9 ?. C. Q2 U: G7 u- p* d3 U以及
' m$ M4 [: Z3 V% y0 J' M{1/2×b(a) , 即上面所述的A(d)结果发生
1 d) h, Y# D; o& ZR(2)={0, 即上面所述的A(h)结果发生
& U- j' v1 [/ c) F' {{O(a)*b(a), 即上面所述的A(a)结果发生
6 n N5 u+ f" _! [投注主客的期望回报总数分别为' V8 H- q( J( |/ x! i0 o; E
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))% T: k/ e: u* w4 E% p
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)]: ?9 q- d0 s9 V( ]. Y2 u9 e
和上面计算过程相似,得出:
: W+ L- ^$ R( c, g3 ?3 xE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)5 ^7 f3 Q0 h1 g* h, }8 q& z: x
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
9 A8 W! X; j6 V( ZO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
" O8 C9 j2 H! X( {O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h)), i0 J8 Q3 I% a5 Y5 _
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
' z7 [1 Z/ j% u& {* D1/2×P(d)+P(a)*O(a)=18 ]" p* v2 q6 X0 j* ~, O+ i
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
" r+ V- T& K7 ?, f# q同样主队让平半就分别是
9 E. n4 L5 w! R8 ]3 jO(h)=(1-P(d)/2)/P(h); [1 A; j; q7 x3 q4 ~+ \
O(a)=(1-P(d)/2)/(P(d)/2+P(a))3 m/ d( D# ]& [( o8 K
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), h' |9 [) I3 e' r' g0 [& 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
, K' t- n" \) Y# b0 x) v' W' ?B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}( b7 s) V) s+ K3 B/ s
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
, ^% d h+ o$ o% a5 AB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
0 r: S) Z* c5 P/ I. H* E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:
) h; L3 y' O: ]$ T3 c7 i{b(h)*O(h) , 即上面所述的B(d)结果发生( ]( u E+ A) Q5 F7 C6 n" D
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生/ K9 s: y! ?3 M, W6 K
{0 , 即上面所述的B(a)结果发生4 Q9 t( D1 R+ `# A1 p8 w
以及( R- f2 i9 X- G0 y$ w A# n1 H
{b(a) , 即上面所述的B(d)结果发生* F8 w' D6 Y2 d4 B: p2 T
R(2)={0, 即上面所述的B(h)结果发生
`& b5 L y' t7 @8 a# \{O(a)*b(a),即上面所述的B(a)结果发生
- S; @* y( |0 a! b投注主客的期望回报总数分别为
6 q7 `0 N0 d# ~' ?; [8 c& bE[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)]
* L! W' I+ I k5 k. B IE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
" C( T2 Z5 O+ N; K/ y6 {假设实际投注回报与期望投注回报相等
" n7 m% N6 M eE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
. ]4 n! p9 }2 U8 B0 Y2 FP(h)*O(h)+P(h1)-P(h1)*O(h)=1" u- s/ x; |; R5 O
O(h)*(P(h)-P(h1))=1-P(h1)
* e' O! e$ h4 O7 V; ?" J$ o' fO(h)=(1-P(h1))/(P(h)-P(h1))
) a6 F6 q- d( P) u% K% RE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)! _* t* Z& |- a$ A% I
P(h1)+O(a)-P(h)*O(a)=1* b1 Y1 T. _' |
O(a)*(1-P(h))=1-P(h1)1 \7 J1 P. {; Q# Q# m# ?
O(a)=(1-P(h1))/(1-P(h))
8 _* P" z- L: E+ V7 _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。
$ d+ y1 ~1 e0 t6 z8 P% c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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