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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。
- p5 ?' L2 j4 y" r/ B那么,平局、主胜、客胜就有以下表达式:
+ Z1 M/ U9 Q' M9 G# U! WA(d) = {W(ij)|i=j, i∈N, j∈N}
% ?; n A% s# a: e( M! iA(h) = {W(ij)|i>j, i∈N, j∈N}( E4 G$ t: B$ V
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]:( f4 H2 L6 n7 ~3 T$ \+ {
P(i)=P(Ai), i∈{0, 1, 2}
6 d/ n( j3 q T$ n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): G# c* M5 q' c* L; Z
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:
" A3 ]# J1 ~; o9 c5 O- W{b(h) , 即上面所述的A(d)结果发生
% I! {& s" @9 ~' SR(1)={O(h)*b(h),即上面所述的A(h)结果发生% t. Y( @6 {; V0 F
{0 , 即上面所述的A(a)结果发生- ]) ~2 {* d- v# [; F
以及) a. Q1 @/ ]- N% E2 M$ V
{b(a) , 即上面所述的A(d)结果发生
: P" x A! ^0 V& c! G. F- LR(2)={0, 即上面所述的A(h)结果发生
/ e% i, C& p8 I$ |/ i8 t6 ]3 H{O(a)*b(a),即上面所述的A(a)结果发生: ~+ b' {# J* W3 T9 m6 S
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
}, P" z+ H# C: n那么投注主客的期望回报总数分别为5 {. Q! X' Y4 O$ G0 C; M
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]$ C( D2 w3 j8 L* u
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
! u: M5 i$ X9 [6 X9 [. i. U _4 h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. F! K" T: j6 h- k: ]
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
# p# @$ z* |' m; E- yP(d)+p(h)O(h)=1
- |8 D2 h+ L) P/ QO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式
`2 e5 u) X+ I9 c5 @5 xE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
: ?3 D6 h6 U0 T0 H4 T6 {- h% mP(d)+p(a)O(a)=1' F; Z$ ^! p; o4 R7 |& W
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
0 t0 m# l& u x/ f- }" d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
2 r2 B4 g# J; l, |. n三、半球盘的计算描述
/ q* `0 G2 Q" N) j* r接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)1 f' I. |4 q: P5 ?4 C' ?; Z
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:, A4 F6 ~9 |/ I
{O(h)*b(h),即上面所述的A(d)结果发生
% ]2 }5 v" X7 h& f+ [R(1)={O(h)*b(h),即上面所述的A(h)结果发生; h, Y7 u I8 d. D+ N S
{0 , 即上面所述的A(a)结果发生
( l* H6 J/ A. ]+ A, Y. ?以及
8 B6 O* r2 [# t2 M8 y% e! g{0 , 即上面所述的A(d)结果发生
& ~7 b( f# q3 S4 i/ JR(2)={0, 即上面所述的A(h)结果发生
2 ?1 \$ r! B8 C{O(a)*b(a),即上面所述的A(a)结果发生
1 N9 S+ m9 t( B8 ?如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率) a5 |' D+ y, ? I
投注主客的期望回报总数分别为
* ?; G2 ]: l1 h: v- k# P6 g+ r( `E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
1 K/ L3 c a# c/ XE[R(2)]=P(a)*O(a)*b(a)
3 W/ F! e1 K* x4 Q! N& w假设实际投注回报与期望投注回报相等
% y5 b; ?$ P( K1 cE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
9 _8 t/ j+ ^# T/ V+ zO(h)*[P(d)+p(h)]=10 ?: z3 K9 h! }
O(h)=1/[P(d)+p(h)]' u- ~' B; x) t
E[R(2)]=P(a)*O(a)*b(a)=b(a)
4 I) }0 J8 q# zP(a)*O(a)=1
1 x" f' f3 K# u! W* U- L3 p- }O(a)=1/P(a)
k" W' `& E0 d1 K6 z同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
) P4 o# g5 }! z8 WO(h)=1/p(h)
' t6 D: N* [5 B) |O(a)=1/[P(d)+p(a)]
# s4 K6 v! f3 a* u' h* t8 S四、平半球盘的计算描述
" b) P/ N0 {% W5 g- K; D r D这个稍复杂一点7 D+ O* b8 v- [8 J6 O* d
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)6 C( H; R; j; V: u
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:
$ P5 f. N1 [; i' d8 D9 [0 d+ K{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生0 [2 u$ |4 A5 F0 K8 T: d; r y
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
6 K0 |2 _% ^, ?( @8 p y0 W1 k{0, 即上面所述的A(a)结果发生6 _ q* S+ v+ w
以及
@5 c, q5 @* Y. M6 R/ q$ k, ?0 \{1/2×b(a) , 即上面所述的A(d)结果发生: g, A2 Y$ I. ~4 T) o! F4 r/ m Y
R(2)={0, 即上面所述的A(h)结果发生
l5 h* L) J6 M! J3 u, g: O{O(a)*b(a), 即上面所述的A(a)结果发生
5 _; y. ^/ I9 T7 O) [( S投注主客的期望回报总数分别为; |8 D0 @3 f) r! k
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))
6 }' E8 V! U0 i) L# H) t( o. q7 hE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]0 R1 H8 o4 l6 i; W. Q' }
和上面计算过程相似,得出:# v2 x, X/ D2 L, H/ \
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
V* m6 B3 s$ @+ Q2 ?P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
+ M$ i* `; [+ C- aO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1) Q( {9 o u# v7 s5 w
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))5 G# V% Z/ f. A
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
4 D' I6 ~( p0 D3 r$ ~! q {1/2×P(d)+P(a)*O(a)=1: g% F# ~# ?8 |6 N. W' k+ S: Y
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a), b2 ] n5 E# Y
同样主队让平半就分别是* C0 }- A5 n. y1 i; f
O(h)=(1-P(d)/2)/P(h)
5 o1 \/ \% ~# y* |O(a)=(1-P(d)/2)/(P(d)/2+P(a))4 L( J4 _- d8 Z+ \0 b5 y" s" h 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)& l* z' B. n6 ~# T1 J# `1 C
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+ n3 T, d5 l5 y
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}5 ?. {8 w2 E& }. w/ F
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}) _% P& D! f( P1 C5 g5 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
, g! L9 V8 Q( [( w2 J2 X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:
$ w+ B% n( ^+ D3 m; n3 }{b(h)*O(h) , 即上面所述的B(d)结果发生, I& Z6 v+ M3 Y5 {3 ~1 E- P4 L+ C& H
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生4 L& I: { @5 D
{0 , 即上面所述的B(a)结果发生
& T) z, r+ q9 `: [( ~以及/ v5 X9 o3 [* S$ m
{b(a) , 即上面所述的B(d)结果发生" ]! N, ~( `; M7 d& l. n
R(2)={0, 即上面所述的B(h)结果发生) y2 [/ _. R, \/ x
{O(a)*b(a),即上面所述的B(a)结果发生- L, u$ o6 n/ ]
投注主客的期望回报总数分别为; h3 e( l4 E# K. n- A
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)]
# I$ @" {9 ^) x- Z c% N1 }E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
: k9 _3 k1 _( y" ^假设实际投注回报与期望投注回报相等1 u+ ?6 ?/ P0 V$ I2 G) t
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
. k9 w$ c) W$ }- T6 d mP(h)*O(h)+P(h1)-P(h1)*O(h)=1' M) H; R4 Q# R# |3 j8 L
O(h)*(P(h)-P(h1))=1-P(h1)' i& ?9 J7 H: O( W
O(h)=(1-P(h1))/(P(h)-P(h1))
' i6 V) r. I. `E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)3 u3 D9 x5 K b& r% ]; N
P(h1)+O(a)-P(h)*O(a)=19 R& r' f8 k9 {; z- x0 V; [# D( ` D" ?
O(a)*(1-P(h))=1-P(h1): v9 ^% Z. {* |3 Y6 O7 I0 j
O(a)=(1-P(h1))/(1-P(h))# O h) X" a: o+ s d( k
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。* C6 {( |( ?( 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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