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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。: E$ E2 m- ?% i6 C# R
那么,平局、主胜、客胜就有以下表达式:, M# j+ R4 B' K$ j+ [, `' ^
A(d) = {W(ij)|i=j, i∈N, j∈N}7 }+ @) n/ e% X% G
A(h) = {W(ij)|i>j, i∈N, j∈N}
1 Q9 \4 g% O' q1 F4 n- 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]:# y* [8 l/ J$ c
P(i)=P(Ai), i∈{0, 1, 2}
& R% j( [2 R+ N+ D; i8 g; {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)
1 y+ y6 M9 `. m8 |( T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 u% s) P: S4 U
{b(h) , 即上面所述的A(d)结果发生
" p. D& n" q+ v1 h( q2 d* X$ ~R(1)={O(h)*b(h),即上面所述的A(h)结果发生$ G' Q/ D( y% c0 w, m0 y6 q
{0 , 即上面所述的A(a)结果发生
# |) m$ b6 k( u# t2 P以及
1 @5 b. P) p7 M; _% e4 e{b(a) , 即上面所述的A(d)结果发生% m/ Y: M: z9 M; i
R(2)={0, 即上面所述的A(h)结果发生! J" m: `2 z/ V) S2 j
{O(a)*b(a),即上面所述的A(a)结果发生! U/ i, p# L2 p4 g k
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
* T2 S2 j- d# k, T那么投注主客的期望回报总数分别为# z* @: l( O, f! }0 O* p
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]. p; \# G$ r. W( u
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]7 z/ j) r& b% N, W3 R' k
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* Y; w& `* A5 U$ I5 I
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)% p$ {) k3 X1 n2 ^% g: t
P(d)+p(h)O(h)=1% e+ }/ z2 j4 P1 Z; |6 y; q
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
6 h& K2 Y( |" h6 P! h( T1 r8 uE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
n6 w8 w/ s3 {P(d)+p(a)O(a)=1
, h/ P; E) L9 ]4 v5 s4 ^& j# G6 _* 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
# I9 ?+ L& A: ?( r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
) |4 `2 d" o6 x5 m, a1 z/ J1 l三、半球盘的计算描述8 o/ t" X" N* b+ ]/ N
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
2 E& \+ W$ d9 @. @2 L; P2 z* O. 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为:
3 J2 z. }+ [/ E" b; R: G1 e& _{O(h)*b(h),即上面所述的A(d)结果发生* ^; m! P2 [) [
R(1)={O(h)*b(h),即上面所述的A(h)结果发生- ?0 E) G' ]9 c
{0 , 即上面所述的A(a)结果发生
+ @2 p2 m( M% S" @8 L- u! }% H% d以及) @' X% d) B" L: s+ p# E4 s
{0 , 即上面所述的A(d)结果发生% a7 {- K# x5 {' w/ L- \
R(2)={0, 即上面所述的A(h)结果发生& c3 U2 ^$ t" ]. B2 u( a& }
{O(a)*b(a),即上面所述的A(a)结果发生
; T0 Y" y4 U# Q: U7 T. b如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率& R4 O4 ]1 m5 _" ]# a9 q
投注主客的期望回报总数分别为
/ F9 S3 Z* k% kE[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]* a3 {5 a/ T3 I3 g
E[R(2)]=P(a)*O(a)*b(a)
2 b0 Z7 ?2 ^2 z- h假设实际投注回报与期望投注回报相等 z4 S$ m W% z$ }& U7 x9 A& ~4 k
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
- |6 [$ A( N: @' x" y* PO(h)*[P(d)+p(h)]=1
" [$ ]0 o) o. [O(h)=1/[P(d)+p(h)]
! \1 m( j* A C/ M O% IE[R(2)]=P(a)*O(a)*b(a)=b(a)
* o) Q4 T3 t! Y2 K0 B/ r# UP(a)*O(a)=14 I. p6 t7 k5 B. _8 E
O(a)=1/P(a)
0 T8 x& ?( u8 C( t) N同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率1 B6 w; K) _) ?, M. @4 n# @3 x2 t
O(h)=1/p(h)
; n) S- D( r6 u3 k Z1 l# HO(a)=1/[P(d)+p(a)]6 \4 Q9 p6 }! H* b7 f5 Q
四、平半球盘的计算描述& b3 ? n0 b# }! p. z4 d
这个稍复杂一点
+ O. n* A: M/ j4 I接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
# P# o5 U( r$ M0 K% ^1 ^1 {) }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:2 Q! `: I( M; s5 }7 q! |/ T
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生# K: t8 I! E, t: I
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
: m* t1 i4 t7 {0 v* Y$ m J{0, 即上面所述的A(a)结果发生
1 a8 r0 g: v% z以及
9 |9 c0 ^7 c* a4 p; a4 @. T{1/2×b(a) , 即上面所述的A(d)结果发生
3 N/ u. L6 c; v8 i T' oR(2)={0, 即上面所述的A(h)结果发生
7 C( L5 J5 {3 s. ]{O(a)*b(a), 即上面所述的A(a)结果发生
: V, i6 a8 O0 d$ N# G投注主客的期望回报总数分别为
( m( {) H& M. V7 O* s* 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))
0 Y# b& H9 D4 M8 kE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]" v# V. h5 L( l+ U# S" H: t
和上面计算过程相似,得出:* T' h) x1 P9 w! A! X. X- y W! Z( x
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h); M2 c& E2 z1 ^: y; j! M# T
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1
/ n; `; |0 v1 `. eO(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1$ G+ p" t# ]/ O5 P8 [
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))0 v% W2 N4 y, T. }8 j6 \) N8 a
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)* e8 O5 n. s) k/ w7 i; d& y
1/2×P(d)+P(a)*O(a)=1# F$ M/ ?6 k k" a# A; Z
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
k) J0 W) K* m! U6 w8 Q同样主队让平半就分别是8 a( X5 n/ }+ w; ^9 l8 o! O- \
O(h)=(1-P(d)/2)/P(h)
4 u' L7 |1 k% O# ^$ Q2 _$ N! Y" wO(a)=(1-P(d)/2)/(P(d)/2+P(a)) {/ {/ @$ c! f x% b
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)
' P0 K& k, z5 N5 z2 u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2 u0 C' A( D3 e1 c4 O
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}# ?2 \5 y* A/ R4 H
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
2 M; a8 O" T( u! c6 \/ ^1 ZB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数5 l* p! e; n- D8 n2 ^
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:
0 H( u) |3 W. v( K/ D{b(h)*O(h) , 即上面所述的B(d)结果发生
$ P/ t* S9 ], Y a* OR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
2 E5 E4 T+ x; O: F1 q+ |{0 , 即上面所述的B(a)结果发生3 u" n: P; f8 ]2 P- b
以及
9 Y8 u. b$ {" Q. @5 H" u2 |{b(a) , 即上面所述的B(d)结果发生
/ ~& w, ^; K! I1 o! q5 wR(2)={0, 即上面所述的B(h)结果发生
; v/ G1 d$ H; [. w& K0 D{O(a)*b(a),即上面所述的B(a)结果发生
4 D# I# l# b- q, l$ { F投注主客的期望回报总数分别为$ h* V9 `$ s/ O
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)]
9 I$ Z+ x- ^( r9 ]9 AE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))& }9 q3 `! z% o% \% o! S$ k
假设实际投注回报与期望投注回报相等' P0 I. I. d( b
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
8 D5 t* n+ p8 Q( ^" H t' @P(h)*O(h)+P(h1)-P(h1)*O(h)=16 R' n1 s! r: X/ z( R! ^# I
O(h)*(P(h)-P(h1))=1-P(h1)' r7 K0 u" g5 @- |
O(h)=(1-P(h1))/(P(h)-P(h1))' p- p# N5 b3 F# _/ X4 {: h8 j) w4 v
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
+ [( Z1 i( J% e# R: ]P(h1)+O(a)-P(h)*O(a)=1
u: Y1 g: f* {O(a)*(1-P(h))=1-P(h1)" x9 B3 H9 m. Z" V# B- h' Y' Z
O(a)=(1-P(h1))/(1-P(h))
9 j7 f& ~4 `/ A; ^+ 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。
/ @4 ^! F1 P `$ s- 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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