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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。: W1 A8 U, ~- q
那么,平局、主胜、客胜就有以下表达式:
{% G6 o, F* L& y9 v. g, LA(d) = {W(ij)|i=j, i∈N, j∈N}8 g- F- J. ^0 @# K7 T
A(h) = {W(ij)|i>j, i∈N, j∈N}
9 U8 X1 T% T7 S; D: ?6 g2 ?8 YA(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! {6 |5 P1 S5 g. x6 Q
P(i)=P(Ai), i∈{0, 1, 2}
5 R3 G6 u2 J/ e9 m# E5 q: F' p0 R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)
% L$ U; ~# _2 I+ c& L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:
( J0 T/ o2 E% T: g. s! j& v{b(h) , 即上面所述的A(d)结果发生. p* G& s/ e7 w
R(1)={O(h)*b(h),即上面所述的A(h)结果发生( q' ~6 P! f+ a+ j1 a
{0 , 即上面所述的A(a)结果发生
) ^2 \- n/ H0 q1 f以及
$ d, g1 W, H/ N( N3 A. ]0 `{b(a) , 即上面所述的A(d)结果发生
$ U% r4 j/ I" y, N6 ]R(2)={0, 即上面所述的A(h)结果发生
+ |& f, l4 Y0 [& u1 X, H{O(a)*b(a),即上面所述的A(a)结果发生
" `( l) M# j/ x, Y! A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
* e$ s9 ?2 R, v$ Z; p S. }那么投注主客的期望回报总数分别为
5 O1 H# L' j- Z& V5 `E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]6 h3 _+ }: X6 {" U1 W, ^
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]5 r8 y$ ?# b/ }7 J4 z9 K; f
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, q* u2 v/ x2 y- {5 O
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
. C2 ]1 j8 o8 OP(d)+p(h)O(h)=1
. g ?' H4 s! IO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式
1 T( b, q% z% h5 T, B% A& vE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)$ F! Q0 {% Y/ k2 B M: d
P(d)+p(a)O(a)=19 z6 L6 P& ?6 b* J; I' }* ?. x
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
& r1 {8 D; \. V5 H$ E6 u: R2 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, V! w0 b( g9 _) \! Q" |2 \
三、半球盘的计算描述6 _7 R V7 n7 f2 R7 X3 H9 @0 g, K
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)# _3 q- ]% e4 t
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+ R4 R% N' X' m* }2 V2 A{O(h)*b(h),即上面所述的A(d)结果发生: u* T* v2 q) Y' T( M6 N
R(1)={O(h)*b(h),即上面所述的A(h)结果发生& C6 K8 W# a2 U5 [3 y3 A
{0 , 即上面所述的A(a)结果发生
( N- B) s% ~3 C8 C# ?以及
4 C q% d- y: q{0 , 即上面所述的A(d)结果发生/ H/ c$ w7 e! z
R(2)={0, 即上面所述的A(h)结果发生
& F5 C W+ ~8 J- i* |{O(a)*b(a),即上面所述的A(a)结果发生
/ t# c `8 d2 m1 K' 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+ @0 ^, Y" D. @0 l
投注主客的期望回报总数分别为% }2 ?7 ?4 v1 B# ^% X; d
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]( u& G' k3 J( @! n( \
E[R(2)]=P(a)*O(a)*b(a)
/ Y2 v* h6 I F假设实际投注回报与期望投注回报相等
2 n: }# l1 |+ F7 QE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)" \# A" T9 Q" E0 \
O(h)*[P(d)+p(h)]=11 J' l7 {+ Z6 |
O(h)=1/[P(d)+p(h)]
2 u) v$ F* r# dE[R(2)]=P(a)*O(a)*b(a)=b(a): O% T7 \8 J) b' }' m
P(a)*O(a)=1
' a3 d r& G/ S9 Y" j3 o" P( aO(a)=1/P(a)% s$ }1 q- q0 x
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率6 Q- z6 o; ~$ C( `
O(h)=1/p(h)
1 d% B& L+ F- i2 s% |O(a)=1/[P(d)+p(a)]
L R+ b; A8 U1 ^+ w! }四、平半球盘的计算描述
: i# F1 i. I5 I3 ~5 J1 q+ ^# P) G- W这个稍复杂一点3 l) t9 l" j6 M! [/ C
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
/ h7 O1 B* L" S8 ~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:
9 ?1 e0 K$ G p% d: J0 _{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生/ V8 B% z1 D' w# k0 G, P) C- m
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
- u* P: W, K; e' a* @, S5 [ O{0, 即上面所述的A(a)结果发生! B' [/ \# b: `5 N, H- \
以及0 X' J& y7 l- b" k4 M& p) C
{1/2×b(a) , 即上面所述的A(d)结果发生
4 G$ ~% [' r( u# c/ K# { u6 OR(2)={0, 即上面所述的A(h)结果发生7 x9 Y* f! Y8 f2 @9 F
{O(a)*b(a), 即上面所述的A(a)结果发生
; l0 ~0 ` y8 o. z8 z' s投注主客的期望回报总数分别为
7 R0 c. m) W% T2 y$ k7 G9 X: BE[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))
- i1 j" L6 S1 D- O) V 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)]9 M4 T1 D/ F; g. k
和上面计算过程相似,得出:
7 |* H6 D1 D( j; R" lE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)3 Z. l e+ ~$ p8 v r* k
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
' Y0 ~3 }( k L4 j" o5 iO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1; @$ s" R# A1 \( r, {) t G, K
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
: h& e' u/ k1 R1 E: @2 [% AE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)# j; I0 ]$ l2 l! F j+ j
1/2×P(d)+P(a)*O(a)=1
# h( z/ w( }) y! YO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)6 {! P2 q/ {& x" h5 S4 B
同样主队让平半就分别是' \. [! R% @- L
O(h)=(1-P(d)/2)/P(h)
, q, |+ X o- AO(a)=(1-P(d)/2)/(P(d)/2+P(a))3 j9 R4 l9 l* |
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). m$ K9 d U& X8 C5 |# l6 i2 f
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
- U, Z: \- F# r) f, `, OB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}" }" w# D0 x. ^* k3 L/ E3 N" \
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}8 R+ r' w! Q: A2 _, k, \! X
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数& V& V' j# {8 h" u; V! g! D3 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:! R* s, e! U* a! \9 p. `
{b(h)*O(h) , 即上面所述的B(d)结果发生
$ X. A7 U2 x* A0 F/ ^4 YR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
# x/ i' ~( O% _4 u0 y{0 , 即上面所述的B(a)结果发生
( ^8 X" E$ c+ R% F: ~以及/ O8 E; E; _1 X6 f6 T
{b(a) , 即上面所述的B(d)结果发生& @/ z( ~' k' E7 c* a
R(2)={0, 即上面所述的B(h)结果发生
- U y0 L$ z7 Y( P/ k5 ^" I{O(a)*b(a),即上面所述的B(a)结果发生4 }7 E) ^; S' k- E7 \$ x; I6 ?
投注主客的期望回报总数分别为7 d* } V. [9 q+ X% \! H8 g0 ~
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)]
6 p* H- n+ q& Q& ]E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
1 C6 u; b' J/ `( y1 G假设实际投注回报与期望投注回报相等
. v% t7 ?! k7 J" b3 ?+ |/ h5 d" t, CE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)5 {" s# v: @3 @
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
. o5 B# k# [! pO(h)*(P(h)-P(h1))=1-P(h1)
% _ N; C8 j& a/ G# @O(h)=(1-P(h1))/(P(h)-P(h1)). L* l0 R& u3 R) z# \8 B( d
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
: d3 f: w. n/ [, q4 s1 \$ e1 D/ DP(h1)+O(a)-P(h)*O(a)=1: E3 H( W: a0 Z/ E4 j8 A7 M
O(a)*(1-P(h))=1-P(h1)
* _- E, s, J, v( ]O(a)=(1-P(h1))/(1-P(h))# W( ?# l; T! t. x7 W
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。2 y9 C; B: C, t
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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