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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。" c1 B3 u5 g2 r/ Y
那么,平局、主胜、客胜就有以下表达式:$ w7 H+ ?! M) F* i/ t9 F3 U: y
A(d) = {W(ij)|i=j, i∈N, j∈N}8 u7 H" {" Y5 K/ @8 h1 n
A(h) = {W(ij)|i>j, i∈N, j∈N}# W7 k3 b5 H2 r/ u
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]:4 X, k f, p$ i, y
P(i)=P(Ai), i∈{0, 1, 2}' p" o+ t; @2 T& @4 J
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)7 f- `1 _# H9 h& q
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:
, `4 g! h; g' [+ z1 b{b(h) , 即上面所述的A(d)结果发生
, L; H9 i) e" GR(1)={O(h)*b(h),即上面所述的A(h)结果发生
* ]4 ~. g+ o7 b! V( _6 o{0 , 即上面所述的A(a)结果发生
% X, K# \1 u; W5 C0 C6 L- b/ l" R以及( H* C! w; w, ]+ s; \2 L
{b(a) , 即上面所述的A(d)结果发生
1 t+ }8 H g; |0 u# C5 l1 D. k }R(2)={0, 即上面所述的A(h)结果发生3 h/ k" U) Z) {: r6 x6 }1 f1 H
{O(a)*b(a),即上面所述的A(a)结果发生
, L; b+ }: `8 } B. m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
. l( L8 w4 R3 ?那么投注主客的期望回报总数分别为
}# e3 @2 L# d4 p# jE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
" x9 X4 V3 Z8 `6 {E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]& G( P+ f4 V- L8 i7 k+ n* {8 L; C
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
. @; A( V& l( Z6 b3 jE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
n+ g2 h: {0 C& o HP(d)+p(h)O(h)=10 \! N Z, x# t- S' I: P
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, F' G- s2 Z9 V0 W& v
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)! t. B, w3 y8 {8 C: u r- L
P(d)+p(a)O(a)=1. g" y" V! W. k2 X3 r
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; K( f/ o" ^' |& g9 l& H% I: Y
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
' X/ y1 |- J# V三、半球盘的计算描述
% L5 }6 |4 B. y \& p# F接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)% A; c/ G! G, V! p
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:
. |' x9 Q# T% D* w: o{O(h)*b(h),即上面所述的A(d)结果发生
' ~- s! f& t, L6 D& W- J d( DR(1)={O(h)*b(h),即上面所述的A(h)结果发生
$ ?8 g- b9 ^" ^' n{0 , 即上面所述的A(a)结果发生; q- s' p4 e, J6 \% |$ I; p
以及; X9 n- t( `$ }) H
{0 , 即上面所述的A(d)结果发生
1 o' K! B! y( }: o7 [5 Y. @! i( W* TR(2)={0, 即上面所述的A(h)结果发生
% |! U& A0 ]8 S6 u0 Q{O(a)*b(a),即上面所述的A(a)结果发生! [- b2 V( J$ {. k+ P1 C$ ~* o( m$ 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
) g" a; u, k: o4 I/ X" W投注主客的期望回报总数分别为
( w. {) \& A7 ~8 P+ z! H+ GE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]. y, W- \* p; L8 Q6 G0 L
E[R(2)]=P(a)*O(a)*b(a)& m% E" E( s8 D7 k* q9 M
假设实际投注回报与期望投注回报相等& B9 V: t8 i9 [3 g; k
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h): Q9 m$ k9 T( Y. P- U7 k5 F
O(h)*[P(d)+p(h)]=1
: {/ E0 J( i3 w& \$ f* h+ O/ }O(h)=1/[P(d)+p(h)]
D: c# T2 p: K0 P3 oE[R(2)]=P(a)*O(a)*b(a)=b(a)- L" C1 F0 t: _
P(a)*O(a)=1' ]$ D. U5 K( ^; ~3 I0 X: a
O(a)=1/P(a)
8 X9 o5 g; D% F; _ b* e同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率- T0 p! P p* p% s! k
O(h)=1/p(h)& c/ x0 o( m$ J
O(a)=1/[P(d)+p(a)]( T6 ~6 E( `$ }& U. s
四、平半球盘的计算描述2 q- P0 j1 H# s1 x: [9 C
这个稍复杂一点
9 L0 P$ ?* v9 p( Q" Y) v. v% [接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)" U H0 P3 N0 Z+ \' L- |0 Y3 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计算:
6 x7 A* e W) {5 q* y4 g{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生, T9 T2 Y) O- b {4 r$ F
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生4 S% _* s( C9 v- K
{0, 即上面所述的A(a)结果发生
% f' G" ]* W* z以及
& ~2 d8 n6 y1 y{1/2×b(a) , 即上面所述的A(d)结果发生! Y+ U/ o; J* l4 x' {
R(2)={0, 即上面所述的A(h)结果发生
4 N- T9 h' W9 S& w1 ~2 Q# h% w{O(a)*b(a), 即上面所述的A(a)结果发生
9 V$ @& a7 W2 m5 \ p投注主客的期望回报总数分别为9 W& b t$ [0 A U; G
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))
) D4 ^) x7 r! o6 M7 @1 ]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)]
( \/ S% F4 G# _7 K1 L和上面计算过程相似,得出:% J' Y3 U% X+ E6 u
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
& a! S7 U _$ V* r, @P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
- u5 [- N( [: ~6 MO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
. F x- `( V4 v7 U$ @) _9 {O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
9 S! R% G T, Z: _# ]5 ]E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
% W3 L: r) ?0 U8 Y' v' t1/2×P(d)+P(a)*O(a)=11 v0 X) k2 X& h
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
- [% i* q- m; a. y- C& |* X; k同样主队让平半就分别是
/ ` N& U) T3 p$ U) ?& Q! B# {O(h)=(1-P(d)/2)/P(h)/ }6 z9 @3 Z8 m$ [" H2 E0 q3 r
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
* f* W& z* a2 Y$ O8 M! z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)4 d) X) B& n5 q- ?9 ~' o
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. |9 _" |5 x' Y
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
0 j6 N7 e) f4 C' x7 ]B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}: r4 X2 U% r7 y2 B. [, 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
0 y, s; A4 H! `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:
+ c w. k6 z& B. M! a{b(h)*O(h) , 即上面所述的B(d)结果发生; [, g8 `7 A6 `, y
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生; y* i/ s; b3 f1 X! \/ p2 G% i9 W6 G
{0 , 即上面所述的B(a)结果发生
' E* s: V+ W* z4 _4 q# B9 j以及
# Y4 g1 p+ i4 m% R9 |{b(a) , 即上面所述的B(d)结果发生" J2 h1 z6 ?1 B6 R" G
R(2)={0, 即上面所述的B(h)结果发生
9 \ _: V8 i' ~ J{O(a)*b(a),即上面所述的B(a)结果发生3 z% x( N. x; @6 A% E# y5 p" ]
投注主客的期望回报总数分别为
+ c! H+ r4 _' W: gE[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)]& j! P! t5 m3 \# y
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
2 o4 A) m, k$ m4 \! H假设实际投注回报与期望投注回报相等
( ^: C" b6 b/ ^; w/ c5 i+ TE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
5 j' G: J& t: D% t. f2 ~* x+ ~1 p, LP(h)*O(h)+P(h1)-P(h1)*O(h)=16 I* U$ ?0 I8 B5 ?9 Z( R
O(h)*(P(h)-P(h1))=1-P(h1)* ~' z& V$ g5 G; F( s. t9 b6 p
O(h)=(1-P(h1))/(P(h)-P(h1))
2 w, g `: I5 r9 h' [E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
5 }3 x1 [! Y9 W4 YP(h1)+O(a)-P(h)*O(a)=10 q& I$ x# w1 ~( s
O(a)*(1-P(h))=1-P(h1)- t8 L8 j! P. u+ k9 O
O(a)=(1-P(h1))/(1-P(h))8 {& j0 s4 h; G
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。' n$ E" Z4 c9 w& U# s) X% ^) X/ e
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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