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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。, i* f! x9 w% ~& x, Y2 ^: Q4 N8 ~
那么,平局、主胜、客胜就有以下表达式:! S( t5 R! d; T3 i6 f4 d& N
A(d) = {W(ij)|i=j, i∈N, j∈N}
0 K2 q* G! x8 U& m$ ^A(h) = {W(ij)|i>j, i∈N, j∈N}
' l5 @ T( F6 v$ j/ y qA(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 A" F' x; O' s8 b
P(i)=P(Ai), i∈{0, 1, 2}
2 H; ^, G+ _3 Q$ x* E m! X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)
c, @2 A! F: o1 a& U. M. C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 A" ~' Y, ~. D
{b(h) , 即上面所述的A(d)结果发生! ?- N( e( Y3 b
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
% _( j" D# s3 o' c! A* K{0 , 即上面所述的A(a)结果发生( } y1 f/ H: |" v8 o4 g
以及
; P3 J r7 A8 @0 M{b(a) , 即上面所述的A(d)结果发生
3 } u5 V4 L" z2 h" N" WR(2)={0, 即上面所述的A(h)结果发生" ^+ U* A/ O9 |0 E+ r; K! t0 |
{O(a)*b(a),即上面所述的A(a)结果发生
' y0 l8 }8 W5 S+ E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. O( b7 T* g: t% x! j
那么投注主客的期望回报总数分别为1 ~: d% E+ s8 u& t. J5 ^, _4 |8 t0 A
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]/ P/ J+ V2 K( E9 w3 p
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]+ F) u6 j$ ^$ T- F' Z; `
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
; I7 @# g' p! x- F$ tE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
( l6 S: z5 r5 E5 M8 S0 YP(d)+p(h)O(h)=1* Z0 B$ G: o" h5 K# E" X
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 M4 l# k/ q$ [9 u" `+ ?( WE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
% ^$ K7 E- `$ l' c0 x8 EP(d)+p(a)O(a)=1
# v P w" s5 F$ L* @$ Z$ C4 q! uO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式
l7 I0 b/ Z0 e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8 B/ g2 }4 X! t* k
三、半球盘的计算描述8 W+ h4 C7 p4 l D
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
* ?. Q# J3 ? f3 D+ R, 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为:
8 w& p/ ~% m9 a) h- V5 o( A( t{O(h)*b(h),即上面所述的A(d)结果发生! r; J9 D5 ]$ [9 T2 b
R(1)={O(h)*b(h),即上面所述的A(h)结果发生7 g/ w* o" W ]8 [. j* [
{0 , 即上面所述的A(a)结果发生6 B; Z) G9 \8 h3 |. U% @) ]7 a! o
以及8 G8 R9 m& C- t5 d
{0 , 即上面所述的A(d)结果发生
3 q, \! e+ U7 M$ \4 c1 uR(2)={0, 即上面所述的A(h)结果发生' n/ f q$ `/ K {3 V
{O(a)*b(a),即上面所述的A(a)结果发生6 \9 u3 ~8 |1 S6 \5 S( g4 g3 V
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
& F9 R$ o; B2 K9 l) P& @投注主客的期望回报总数分别为- C9 ^' ? M; _- s) t& m
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
! n W& C$ A6 Q. H9 JE[R(2)]=P(a)*O(a)*b(a)
' l+ [1 {5 E9 V8 M$ r( M假设实际投注回报与期望投注回报相等
4 j; k, |. Y& OE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
6 v1 P$ t- ^/ q! P# x8 f; RO(h)*[P(d)+p(h)]=1
0 C2 L4 L7 U! {7 cO(h)=1/[P(d)+p(h)]$ h9 ^- T! ~& m7 f0 X' i
E[R(2)]=P(a)*O(a)*b(a)=b(a)
: }/ V: v8 X2 [& M: N/ s1 xP(a)*O(a)=1, {% r0 O n8 F' E
O(a)=1/P(a)
1 J% ]2 y! z: h同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率& s7 i( a4 j M1 D. A
O(h)=1/p(h)7 Z: {6 m l0 f$ h4 b" t( E! @
O(a)=1/[P(d)+p(a)]
6 }- q' ^& Z+ _. O4 X四、平半球盘的计算描述
- X! Z: o2 c4 k/ M这个稍复杂一点
K7 D0 _0 W; b接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
, y. O- s1 }0 K O6 O. q9 L. 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:
/ G9 }* P- M& \# i% f{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生' ?' f& b9 L5 O( T8 K8 X; o8 M
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生3 V' ]# S& f R- k
{0, 即上面所述的A(a)结果发生
d7 O; [2 `$ V) W) V4 D f0 E以及9 ^% h" ^3 [1 B3 ]0 Z& c9 c
{1/2×b(a) , 即上面所述的A(d)结果发生! q. g3 |' G1 j5 Y8 j! m$ W
R(2)={0, 即上面所述的A(h)结果发生
+ d8 I! R4 f6 p1 g8 j$ v/ k{O(a)*b(a), 即上面所述的A(a)结果发生
. J% v4 C9 U K. P" o投注主客的期望回报总数分别为
$ a( o' O- }/ M6 v4 d6 r* k/ i6 XE[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))
$ H2 d- s: J& CE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]
# N, d* ~7 Y1 j% G和上面计算过程相似,得出:6 y" b1 p; g: b4 M
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)" V6 X5 J1 e" C
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1, c: H$ A% S. [0 w1 ]9 n
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=18 n( i* e0 {: O4 D
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))1 D- Q* t1 {2 k. v' j1 z$ R, I
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
5 a" e( `' h6 d1/2×P(d)+P(a)*O(a)=1
/ m$ N$ z0 ^) ]8 k8 dO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
1 r7 o s* M, i" E+ S/ k7 w同样主队让平半就分别是
( R0 J& Q3 ~& H k* d+ JO(h)=(1-P(d)/2)/P(h)( B/ m+ t) ?- o
O(a)=(1-P(d)/2)/(P(d)/2+P(a))% j* X+ Y1 e* L z h" H j
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): h0 h0 v6 P% a. S! Y. D% e
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7 [! D- a3 ^) O! U( g' W* Y
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
% I3 b! }8 @" z3 j% V ^8 B* p. F$ oB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
! @0 J m) m0 s' }B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数. g5 F% F% u, E; |8 ]7 H* s. S
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:8 M* r- I. Q8 q' W3 {. x
{b(h)*O(h) , 即上面所述的B(d)结果发生' y& r! m8 r/ `) B" E9 Y
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生- b% U% [& `. X0 [+ o
{0 , 即上面所述的B(a)结果发生! `8 ]/ L4 I, y" i
以及) M2 b4 y9 u# v
{b(a) , 即上面所述的B(d)结果发生
( T; t+ \2 J l' bR(2)={0, 即上面所述的B(h)结果发生
7 u8 C' h& j+ _ f" H{O(a)*b(a),即上面所述的B(a)结果发生7 a, H% F% |* P2 y% ]& C
投注主客的期望回报总数分别为
" f* q, ]" @& g; @9 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)]
* V2 x1 t I. D4 r( l/ y/ [! hE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))! N6 |. l9 c7 l/ D) D: e
假设实际投注回报与期望投注回报相等
% [; x% O9 H# [: SE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
5 G/ X% b% }. A; {P(h)*O(h)+P(h1)-P(h1)*O(h)=1$ b1 ~7 N u# y3 B$ N; s
O(h)*(P(h)-P(h1))=1-P(h1)
% v! |: l; O) _" pO(h)=(1-P(h1))/(P(h)-P(h1))
; S9 e/ c: p+ z: C2 EE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
) {2 o3 c, l) e$ m- N. r; m aP(h1)+O(a)-P(h)*O(a)=18 }6 j( x( ^( |# W: `0 s! V
O(a)*(1-P(h))=1-P(h1)$ { ?' u( P% {+ l. Q& r5 m9 S- {
O(a)=(1-P(h1))/(1-P(h))2 ~+ b2 J" ^. T) v2 F
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。. A2 U6 b8 ^& H* i( x7 \6 }
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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