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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。
! c9 e* K% z8 Q% ~2 {+ T1 b% G那么,平局、主胜、客胜就有以下表达式:1 J7 @0 n4 h; i. r( I
A(d) = {W(ij)|i=j, i∈N, j∈N}
1 o- |. s5 r9 L5 [: t2 ^$ kA(h) = {W(ij)|i>j, i∈N, j∈N}! _- S& U4 h j& u3 I7 O
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]:
6 b, N( f- H3 sP(i)=P(Ai), i∈{0, 1, 2}, B K' v# h2 P7 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). \; o1 |2 H) }4 J& v
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:7 }/ j4 |0 ]; u& N& N5 ~: N
{b(h) , 即上面所述的A(d)结果发生
; ?8 S: c/ T! h. _1 IR(1)={O(h)*b(h),即上面所述的A(h)结果发生
; n* @( w: F5 c% j" K/ ^{0 , 即上面所述的A(a)结果发生; y- @( [- [5 z( H+ C- X
以及
z$ n' y c/ z{b(a) , 即上面所述的A(d)结果发生4 O) v1 \2 k7 _/ S
R(2)={0, 即上面所述的A(h)结果发生$ i: |8 s6 @, ^! T/ L/ h, F
{O(a)*b(a),即上面所述的A(a)结果发生
/ J, }; h" M3 [$ g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
$ j3 x2 `- G; f2 I: S* {& r那么投注主客的期望回报总数分别为8 S% q" H0 P- O1 f4 I- V; i; a
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]; J' \! S* i' P/ K) }
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
! H. Y1 |* k b! q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
g0 Z' {' b, L. Q3 B( A, fE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
9 K4 ~2 Y6 i$ L# j- z, n( zP(d)+p(h)O(h)=1
. n3 k+ i. M# M ?+ 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
, B2 H/ @5 J# G$ TE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
& h' {$ R7 |! O' {' k7 b, Y6 bP(d)+p(a)O(a)=1. O6 c# x0 Y: D7 k" f
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
3 H/ O& v- w+ _0 i$ g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
: S% T% z5 h" h# Q, I1 Y三、半球盘的计算描述+ {' h j- z3 a6 F
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)( V/ c6 ~# |$ u) l: p; j4 \
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:" _% i; ]- r( o) S: g
{O(h)*b(h),即上面所述的A(d)结果发生
1 @5 K$ ~% F: B7 {0 u/ cR(1)={O(h)*b(h),即上面所述的A(h)结果发生4 P# g7 j; M% l( T, {* T! ~" Q& |+ i
{0 , 即上面所述的A(a)结果发生
; G5 t9 X1 w4 |8 E* t+ |( \* s以及1 M! y0 G P7 U) L
{0 , 即上面所述的A(d)结果发生
- j# {1 F7 I k/ g a/ T- ?* rR(2)={0, 即上面所述的A(h)结果发生
( W* w' E/ `% w{O(a)*b(a),即上面所述的A(a)结果发生4 |0 O5 z/ I9 K3 T. c
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
; k* b5 L* ^! C投注主客的期望回报总数分别为
7 Z S- F* n1 O8 e8 ]E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
: S2 u2 l* T, Z7 V8 lE[R(2)]=P(a)*O(a)*b(a)
, ~$ w9 _0 Z4 x. z# Y) V假设实际投注回报与期望投注回报相等0 w1 C8 k$ Z: m3 C
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
. W6 I! r" D$ j. i1 mO(h)*[P(d)+p(h)]=1& b: }, _7 p+ e2 o, u# e
O(h)=1/[P(d)+p(h)]
' s- R$ w: @2 B9 \E[R(2)]=P(a)*O(a)*b(a)=b(a)- T$ A: g! I5 K
P(a)*O(a)=1
5 X6 ?% @4 _ ~ Y% W6 TO(a)=1/P(a)
# B. I6 Q6 C# ^ d+ W同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
% q/ I7 X7 U: q1 |6 X& i8 D# Z/ bO(h)=1/p(h); e: i, d) c5 _; {4 u
O(a)=1/[P(d)+p(a)]
. z" H4 v2 l8 a, x! U四、平半球盘的计算描述- Z9 ]* h, m6 K+ q" Z
这个稍复杂一点
9 N) j# _2 @: `; x# M接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
' O) A4 K+ q. i/ u2 E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 V d/ K+ @4 Z1 U6 b
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
3 f/ @$ u/ S H2 h- i7 J2 IR(1)={O(h)*b(h), 即上面所述的A(h)结果发生
" {) p7 b: G9 X! x{0, 即上面所述的A(a)结果发生! ~6 R/ i$ b1 \) Z6 i; x; o
以及+ f6 b& H& v1 n4 @+ S% v
{1/2×b(a) , 即上面所述的A(d)结果发生
|& h: x8 J4 _' q( ]& ^! CR(2)={0, 即上面所述的A(h)结果发生
7 _8 B- f7 g9 e [/ @7 |, m{O(a)*b(a), 即上面所述的A(a)结果发生% K' f) _. |" e2 }3 u) M
投注主客的期望回报总数分别为
/ V% s% c5 K4 p2 OE[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))
7 F+ r$ B o# w" G' |7 iE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]$ ^' \1 h4 C4 R: o$ U) R4 L
和上面计算过程相似,得出:
$ W0 U: _: E( p8 F, b1 A" CE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h); u4 `& H/ i* L- b$ H
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
+ B( D2 C9 C/ CO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
% h6 l) [: e" `7 P6 z% P3 IO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))* R; F" `0 b0 N& n! }$ {$ B0 w8 Z
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
! m/ ~1 V; u3 y7 }' C1/2×P(d)+P(a)*O(a)=12 J) F. S9 ]9 F4 a
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)0 }/ }' {( d; U5 ^0 G
同样主队让平半就分别是% i& v) j2 U% I) x% u
O(h)=(1-P(d)/2)/P(h)1 s9 C* t0 j9 c6 u) N9 P
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
' E+ Q! y5 ?6 j$ u* i/ g8 f# ~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/ V/ I2 D7 o& D$ T8 w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% L7 k+ U. N q9 O3 w6 |, [! f2 x
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}( z8 e2 F2 d5 F: ^' h! |) u
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}( ^, A5 N5 n2 s* N9 r
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数* k( U. i% W& v
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 y0 C$ x+ `# C9 i. f/ m& q
{b(h)*O(h) , 即上面所述的B(d)结果发生$ M; m, i# y' s* A8 J% I# F
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
9 B! ?; p) h7 F' R7 t7 G{0 , 即上面所述的B(a)结果发生
& _' j4 o7 P, o' n以及) J" o- m& N/ ]5 v
{b(a) , 即上面所述的B(d)结果发生8 r& M4 n7 ?# {" \% l
R(2)={0, 即上面所述的B(h)结果发生
8 |8 g3 {# W! U{O(a)*b(a),即上面所述的B(a)结果发生6 F! L7 q2 u9 u6 D% [: J) E
投注主客的期望回报总数分别为
& C% C; t, j# ?0 }$ {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)]7 _) A0 F' W6 v1 a& h& O
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 r% ^, h3 `5 m% j' _ U% L- I假设实际投注回报与期望投注回报相等
+ H/ V+ H$ j0 [6 e+ p! WE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
' \4 ~0 Q, i. x }P(h)*O(h)+P(h1)-P(h1)*O(h)=1" o9 s' t* s& i% w# Z4 h, O( l
O(h)*(P(h)-P(h1))=1-P(h1)* l# o# O& }& v7 f7 ^# ^
O(h)=(1-P(h1))/(P(h)-P(h1))
( S% `( v, Q7 I6 {+ F8 ?E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)- j0 b$ m2 t) ~. z/ h2 E
P(h1)+O(a)-P(h)*O(a)=1
! U( f: w" I( [% [O(a)*(1-P(h))=1-P(h1)
2 `$ m7 |/ s/ T; q9 ^O(a)=(1-P(h1))/(1-P(h))
0 {0 l1 [/ h0 [. {: w+ |+ x7 B# l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。- J! X3 [! n& s% n( 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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