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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。: v0 C5 G- X( [$ B ~
那么,平局、主胜、客胜就有以下表达式:
0 J. J% [) Z$ }0 t2 sA(d) = {W(ij)|i=j, i∈N, j∈N}6 J- X& B: i& E" Q
A(h) = {W(ij)|i>j, i∈N, j∈N}. X. }% h* K0 a2 y0 b0 q
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]:' k2 [# k( A% ] U7 O
P(i)=P(Ai), i∈{0, 1, 2}5 [7 ^% ^ U3 x' U/ g9 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)& x3 e3 s$ I' }& r: A8 A( a: Y& S
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:
5 ]) W/ X: Q5 @' p* X" W, N{b(h) , 即上面所述的A(d)结果发生6 k- e0 j' I. y# l% ]) i4 m8 {
R(1)={O(h)*b(h),即上面所述的A(h)结果发生/ V3 p* D8 x' ^! n( e ^
{0 , 即上面所述的A(a)结果发生' o3 T" |1 J$ X' T. ]" r! Y9 U
以及
9 g! z5 [6 o8 R4 a' D5 d{b(a) , 即上面所述的A(d)结果发生# J. j8 V. ^3 C. p/ E
R(2)={0, 即上面所述的A(h)结果发生( V- m7 u* {' f# U* F0 z
{O(a)*b(a),即上面所述的A(a)结果发生% p/ [8 h/ l9 X! v
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! Y' q1 a0 r" s& {
那么投注主客的期望回报总数分别为
, u2 b6 T. } kE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]0 A- M. ~3 v- c ^
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]$ J- z" a: H1 R2 E
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 ]3 ^ P* a ? E: J8 uE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h), C; q0 T6 v4 A7 }7 R
P(d)+p(h)O(h)=1
@9 i1 Y" @& G oO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式' m/ [. S. U+ `2 h# r
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)9 G( W& Y3 q+ D' E+ l# n3 P
P(d)+p(a)O(a)=1
. T- |; s X U5 tO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式
6 @; \% a0 u% 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
, |9 ~8 L* P5 b" G; q$ W0 `三、半球盘的计算描述. F1 ]( j$ V7 C0 ^! P( @4 \
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)# e% K( k* r% r8 g! C2 X1 T* y
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:
+ N& \# X) E8 Y u( \! n{O(h)*b(h),即上面所述的A(d)结果发生
0 u: v3 C/ F& _R(1)={O(h)*b(h),即上面所述的A(h)结果发生) F! r* i. T+ t# p9 Y6 [- W5 Q
{0 , 即上面所述的A(a)结果发生$ @! a. B1 f5 A
以及: a! l/ R0 }/ x+ j; V r2 V7 ]. B
{0 , 即上面所述的A(d)结果发生
0 g S1 t4 L/ ?# g7 M" uR(2)={0, 即上面所述的A(h)结果发生( _1 V0 j0 i k5 U0 C3 i9 \0 D
{O(a)*b(a),即上面所述的A(a)结果发生$ G7 k k8 a1 R: N/ P# G
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; w% g1 [# S" |投注主客的期望回报总数分别为7 W7 U, v3 H/ N0 Q
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)] d9 _% U! I! a1 |9 Q% }
E[R(2)]=P(a)*O(a)*b(a)
+ ^; s0 `4 I) c# Y$ J/ N3 c假设实际投注回报与期望投注回报相等
% y/ G9 ]* v [ N1 t/ yE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
+ m5 L2 A1 h, C9 r1 t2 _9 a6 l( M. a( PO(h)*[P(d)+p(h)]=1$ @0 }4 T' _( _ H9 M6 ?
O(h)=1/[P(d)+p(h)]; o6 q5 f3 D- f
E[R(2)]=P(a)*O(a)*b(a)=b(a)
& {, }( @, M6 e7 A- ]P(a)*O(a)=1- f0 v, {! J/ h% v1 @- Q
O(a)=1/P(a)
( T! [: h8 Y" _8 Z同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
# T7 [: ^$ o8 t7 M/ oO(h)=1/p(h)
$ P& g1 O" A; L9 ^3 E; NO(a)=1/[P(d)+p(a)] z! L. L4 I1 j( U |
四、平半球盘的计算描述
' C6 l3 \% y- Q" [这个稍复杂一点
( s4 P# O4 g$ o8 a接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)) S+ j, A- j* e3 H q- p# p! m, N
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:, R# d6 i$ o4 i
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
9 ^/ S/ T/ F5 N$ PR(1)={O(h)*b(h), 即上面所述的A(h)结果发生/ j/ ?2 d& w7 F9 j5 u9 y
{0, 即上面所述的A(a)结果发生
- h% A0 Q% [+ d3 X/ x以及) s- |0 ]. |/ r) ]
{1/2×b(a) , 即上面所述的A(d)结果发生
$ h/ p# ?. q1 r% e8 H; E" }* L& WR(2)={0, 即上面所述的A(h)结果发生
+ t9 ^& b9 e2 A! g6 D, Y! f{O(a)*b(a), 即上面所述的A(a)结果发生
" Z5 n" ~- A# M+ Y! Q投注主客的期望回报总数分别为
1 D% p5 @# ?0 H9 ^1 y) B3 dE[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))# o9 \9 r+ x( j, `( W; s
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)]; Y! @5 m/ E9 [: }$ |
和上面计算过程相似,得出:
) q. ?$ F* z; c) v6 j% S7 XE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
! }. o7 W0 m! E3 [P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
) \" M/ T9 z$ T4 {. oO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
# @! `" ]) g2 S& V9 i+ |& UO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
2 A _- I4 W! A0 c2 o1 iE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)8 v5 A8 a9 ]. Y) `3 r
1/2×P(d)+P(a)*O(a)=1& t5 u/ g' `$ m/ f$ _9 K
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)# m% ~3 `$ G/ j. |3 w
同样主队让平半就分别是) H/ E9 \" I1 H. b3 R5 V
O(h)=(1-P(d)/2)/P(h)
* D; F! q! z& m9 BO(a)=(1-P(d)/2)/(P(d)/2+P(a))
1 G" T; {1 W5 B$ r3 n3 y) Z1 V+ w' B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)
. w2 j5 r; Y e0 J5 L* t- g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* R& l. ]+ F# ^! _; S
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}; u9 d1 y: `* K; F& N
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}4 s' i8 C& N. Q7 Y
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
% M# j% A4 k' a! E P q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:
: }2 M7 \3 S4 I: G) h3 C{b(h)*O(h) , 即上面所述的B(d)结果发生% Z8 ]6 i6 ^7 b; H1 A3 N/ r
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生6 ?% w& j6 p L2 T( X
{0 , 即上面所述的B(a)结果发生5 k+ R& s. g: E
以及* n9 M( z, F- V( v+ x
{b(a) , 即上面所述的B(d)结果发生
2 B% G; f2 _: g! b6 k+ R5 _R(2)={0, 即上面所述的B(h)结果发生0 {0 U" n' n7 q6 U! e* M9 }
{O(a)*b(a),即上面所述的B(a)结果发生% _* V: w8 ~: ]5 |
投注主客的期望回报总数分别为9 W6 s9 v1 x% _/ y6 N8 O& @
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 g4 A% d; E" C" @3 i, \
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
0 _( o4 b2 C( ^' Z4 k5 U# U: y5 `0 \假设实际投注回报与期望投注回报相等
' W7 V% O; u" V1 {: DE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)$ t) Z. @* O) V( c
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
5 I b" n( R; ?$ @O(h)*(P(h)-P(h1))=1-P(h1)
8 [& v0 M$ v! k0 C7 w, `8 ?3 D8 pO(h)=(1-P(h1))/(P(h)-P(h1)) \2 L7 I; I, a' e% ?# G
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
6 x: M2 v# M/ ^" FP(h1)+O(a)-P(h)*O(a)=1
7 y5 A; J L* b1 S' K4 [; t/ K% jO(a)*(1-P(h))=1-P(h1)
" g5 R5 W) D0 yO(a)=(1-P(h1))/(1-P(h))3 n, V. I7 }& W; C
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。
& H6 @, B- M1 ?* I2 \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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