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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。. i- x( O% c6 c, J- d
那么,平局、主胜、客胜就有以下表达式:- N6 \# k+ c" T T
A(d) = {W(ij)|i=j, i∈N, j∈N}
6 a7 w: Y% S4 G3 v& s: K0 f" d# jA(h) = {W(ij)|i>j, i∈N, j∈N}
/ t, v/ P" v" h. K6 O, `( J. V/ MA(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]:) j3 S' O) I# w
P(i)=P(Ai), i∈{0, 1, 2}3 u4 H9 _6 n1 f- ?* H# P) {
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)' ]" \* ^6 U( U
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 W+ i* D( }+ l
{b(h) , 即上面所述的A(d)结果发生
/ {% M$ z+ N% q# sR(1)={O(h)*b(h),即上面所述的A(h)结果发生; k7 X: A1 N0 h
{0 , 即上面所述的A(a)结果发生
* l# j4 `. R+ }" E) ]以及
6 K4 ]% M) ]$ m1 @% u: h5 c{b(a) , 即上面所述的A(d)结果发生; ]3 k ~) S. ]
R(2)={0, 即上面所述的A(h)结果发生0 t* b6 i5 J) o
{O(a)*b(a),即上面所述的A(a)结果发生
5 n% ?2 }% O3 _" p9 \1 u0 J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
% ^& O% z" y( ?( N0 p4 U8 D, A: K/ q那么投注主客的期望回报总数分别为) h1 q! [9 p& ~
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
M% y4 S" {& J jE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]' b4 f! J2 q/ x- y7 j3 Q" L1 ]
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/ o! A2 m8 C& E# L: a0 v4 \3 f8 \" U
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
% v3 m* t$ |: N$ M( Q- x8 YP(d)+p(h)O(h)=1& [2 }% o% L2 H: C# C5 ?; I* M
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. x1 P7 U# t" V
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)6 N2 o6 }% u. O+ ~8 f
P(d)+p(a)O(a)=1
) }: c' n9 m' X3 y$ J- RO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式$ P$ a% p9 i- 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
* l2 ~$ j" r, p! S7 F" m$ D三、半球盘的计算描述
6 a# q# a7 i& \接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
1 e9 B& {4 b0 a) s; R# d' a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:
# }1 q3 m3 F: L5 [{O(h)*b(h),即上面所述的A(d)结果发生. B. y) }* @, E; j1 g
R(1)={O(h)*b(h),即上面所述的A(h)结果发生( P7 B4 ^7 ]; }1 k* f' L0 ]
{0 , 即上面所述的A(a)结果发生; }6 h/ g1 S7 G: {9 l3 h, U- p+ \
以及5 I1 F: i, o# p2 D$ `0 U l* R
{0 , 即上面所述的A(d)结果发生8 H: u- Z4 A1 s; {2 k* Y
R(2)={0, 即上面所述的A(h)结果发生
* F+ Z, ?; n6 y) O+ c6 l5 |+ A/ C{O(a)*b(a),即上面所述的A(a)结果发生 q4 b- C. s( Q9 Q6 d$ O% U
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
y. Q# e- s( G6 F$ e投注主客的期望回报总数分别为; c. |4 e: M7 Y; c
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]5 x, y' R1 Z* Z3 N# v9 [+ t
E[R(2)]=P(a)*O(a)*b(a)
) B# h4 P6 ^$ ]1 n d" P& j假设实际投注回报与期望投注回报相等% Q7 O% Z8 ]0 Q! c7 i9 @
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
) Z% j4 P K" Y- e% v4 Y7 PO(h)*[P(d)+p(h)]=18 R! c# C) o6 r8 }- G8 D7 R
O(h)=1/[P(d)+p(h)]: x- ]- h8 y5 [! C
E[R(2)]=P(a)*O(a)*b(a)=b(a)
6 }. K" u3 O5 H+ q0 hP(a)*O(a)=1
% }5 |; A+ W3 l" X2 LO(a)=1/P(a)
( t; O8 t/ k0 h. M同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率; s+ R. C+ ]: n0 Y" D
O(h)=1/p(h)! X. A) f* R& q
O(a)=1/[P(d)+p(a)]
* e& A* G+ ^7 F9 v四、平半球盘的计算描述
" c0 h% B8 L, u# _) `这个稍复杂一点
2 Q) m' U0 x4 B# C9 Z5 |接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)6 ?% `9 j+ L1 R* K k
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 F# X+ r7 r1 [+ O2 ?! `7 O
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
3 l9 ~, R. w! W. G! aR(1)={O(h)*b(h), 即上面所述的A(h)结果发生$ e, o- W- L K
{0, 即上面所述的A(a)结果发生7 ]2 H& ~' [( x4 i! M* ~) K
以及
* b' x! t3 W: f. @{1/2×b(a) , 即上面所述的A(d)结果发生! C# ]- R' L; [% l+ v. P7 z1 ~) f p$ x
R(2)={0, 即上面所述的A(h)结果发生/ m& r8 u& [) x4 `) l
{O(a)*b(a), 即上面所述的A(a)结果发生3 A4 a3 b$ l2 m7 M, l6 ^- q* d0 \! W
投注主客的期望回报总数分别为( |7 |/ Q0 x- |4 J0 R' P
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)), u3 w) o e* V9 Q' S+ s8 K* @! S$ h
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)]
/ j' X4 J6 \& P9 o, f' S和上面计算过程相似,得出:
6 F; ]) W' q+ K; ]E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)( T+ o6 [; C7 l+ M4 D
P(d)×{[O(h)+1]/2}+P(h)×O(h)=11 q2 Y5 ^1 U& G. f! j
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
+ q& }8 j" |- j3 @O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))- K# _9 d( i0 i F- E
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)& S" f4 P5 E) ~8 f2 `
1/2×P(d)+P(a)*O(a)=1
+ `0 p3 I- Z+ aO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
% p$ _. z ^" m2 x同样主队让平半就分别是+ D+ I, V1 J! r2 U& U: @+ K
O(h)=(1-P(d)/2)/P(h)6 F% ~9 |7 |4 T5 D" B, g; b
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
( U- t. G* R2 @2 @( s& S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- X; B% ` {! [+ E7 H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, a/ [5 {" O0 F
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}4 m' T# a# [" H; O- [. ~& B
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}8 M, Q% x! i* Y Y i% Z; a& m
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数" }1 T6 {6 `+ H& t2 M! a3 _% O: m
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:
8 L2 M9 B/ R# F6 c S{b(h)*O(h) , 即上面所述的B(d)结果发生
7 _( C) _* @, U! M( W2 }R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
0 E8 Z# k# G; v4 E g{0 , 即上面所述的B(a)结果发生1 v9 e( J1 Y5 n" {3 N
以及1 p7 `. k! W* {) J
{b(a) , 即上面所述的B(d)结果发生
, T% d2 J& h* U# v# f" `R(2)={0, 即上面所述的B(h)结果发生- z: Y, M' z: v
{O(a)*b(a),即上面所述的B(a)结果发生
" V( I4 x! q* z/ I' A" }投注主客的期望回报总数分别为' l7 T' i2 T- l* C0 }& F, R5 _! r
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)]4 m# o2 [7 H4 f
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a)); z0 u# q+ _5 {/ _' a
假设实际投注回报与期望投注回报相等
& \+ b0 T& L3 k! [( ?E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
& {$ m* _; f$ P% Y+ \4 JP(h)*O(h)+P(h1)-P(h1)*O(h)=1; C6 S" D1 u8 j, o, ]
O(h)*(P(h)-P(h1))=1-P(h1)+ _8 u7 ]' G) z! e5 O0 d
O(h)=(1-P(h1))/(P(h)-P(h1))
6 C. ~9 k' W Z/ hE[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
9 u/ V, P! k0 i) I8 y. H/ e, g d" x( IP(h1)+O(a)-P(h)*O(a)=1
) ~0 X' E( Y- [: K0 TO(a)*(1-P(h))=1-P(h1)
: j5 N, D- L2 f1 l7 B+ sO(a)=(1-P(h1))/(1-P(h))
: `: s% ]+ S+ r+ b' I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。
~0 Y! r# s5 l$ a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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