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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。
+ P! e) Z7 S3 V/ _* g那么,平局、主胜、客胜就有以下表达式:
}8 m. P) n. AA(d) = {W(ij)|i=j, i∈N, j∈N}
8 L7 x+ ?) q+ l& tA(h) = {W(ij)|i>j, i∈N, j∈N}
: L! X7 _2 A0 eA(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]:7 `! h1 v7 T3 c% C( ~9 U! P
P(i)=P(Ai), i∈{0, 1, 2}) i1 @4 D# M" O' @* M" ?
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)# U$ A: q% q* A4 j$ 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:
9 M8 A! I3 _- K2 a{b(h) , 即上面所述的A(d)结果发生6 x: r$ M; H+ x% g
R(1)={O(h)*b(h),即上面所述的A(h)结果发生9 W' J/ c; }2 X
{0 , 即上面所述的A(a)结果发生- h: y) `- r: d7 l) T9 d
以及
! G/ O3 @% R8 F+ ^& g{b(a) , 即上面所述的A(d)结果发生3 w9 E( b0 o! A) X
R(2)={0, 即上面所述的A(h)结果发生! X0 X9 J# d: O* h+ s' x% E
{O(a)*b(a),即上面所述的A(a)结果发生 j* J$ @# K- K3 V8 X# f) D
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+ f8 r- C* r! {% [8 b8 W
那么投注主客的期望回报总数分别为- D/ j6 y5 J3 I6 n0 x6 F( H$ Y
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]& k5 p' Q2 ?8 w* [0 l" r9 M
E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
$ L0 k4 x, Z. {2 L, o' X/ j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4 A: I5 u5 D" v( C, j F# U
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)! e9 x) s4 D7 ~% H2 W/ W) g' ~
P(d)+p(h)O(h)=1
) D9 a$ `( R' u! H" vO(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 z3 J. ^% l, w
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)" i. w$ H4 D9 E) P+ f
P(d)+p(a)O(a)=1: G5 u6 _+ N& r- F( U/ y+ J& e
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% `# m8 W7 P/ J( R" P) R- j9 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2 R! x$ r* i; I! h
三、半球盘的计算描述
3 q& q4 ^, ?( O6 {- K- g0 |接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
) u- W2 n% g7 ]! c4 `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:
5 A% Z1 O: j+ a{O(h)*b(h),即上面所述的A(d)结果发生3 \" [, m5 A( ^
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
% K) w' q0 W2 r( b4 ]{0 , 即上面所述的A(a)结果发生
0 T& j5 o: ?, V以及
; c9 [0 O0 R+ a# J* `; }6 t0 ]9 B{0 , 即上面所述的A(d)结果发生9 P" F+ X T( n% Y
R(2)={0, 即上面所述的A(h)结果发生
& D) u C) u% q# w) t{O(a)*b(a),即上面所述的A(a)结果发生# T" N! D+ ~# a
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
9 {) t4 K- g/ v4 f8 n投注主客的期望回报总数分别为6 Q7 g! ]4 B- ~
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]' R7 q: e! F- J# V* {2 e3 R/ R' S7 T; F
E[R(2)]=P(a)*O(a)*b(a)3 g/ i- p, Q# ~& w; K
假设实际投注回报与期望投注回报相等
9 t/ K. L7 U0 zE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
2 c% i# G4 i0 O6 B) kO(h)*[P(d)+p(h)]=1
& S- S% f% J# P) T8 d7 p( k, YO(h)=1/[P(d)+p(h)]
) {, X- u0 t0 i7 s& V! p& y" B HE[R(2)]=P(a)*O(a)*b(a)=b(a)
0 v( q1 ]5 e6 u+ f& q. oP(a)*O(a)=10 f! i. K4 J4 [6 E. I3 U
O(a)=1/P(a)
: Z$ A2 C3 E) K: e, G: a Z5 N同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率; @( l+ J% N$ b0 @
O(h)=1/p(h), p/ B5 c( a' n- \% Y) X( r% S6 _
O(a)=1/[P(d)+p(a)]6 K) H$ W) n6 d
四、平半球盘的计算描述9 \! h$ u7 N& k7 o8 q; `
这个稍复杂一点
: u' Z# r1 y" H接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
# M& V, A' e6 _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:
, s4 O$ L& k* S6 @/ C) R2 w{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
[2 j9 N) D; f+ o1 IR(1)={O(h)*b(h), 即上面所述的A(h)结果发生" b/ b+ P5 p9 o% ^! w' c7 l+ K
{0, 即上面所述的A(a)结果发生
- g2 x8 {. v* B* |以及+ u, [% Z" Z( r. }/ o/ }
{1/2×b(a) , 即上面所述的A(d)结果发生
) }: w! I, O1 R; x8 p% ^R(2)={0, 即上面所述的A(h)结果发生+ ?9 B) g3 M: ^* \8 P8 E1 i
{O(a)*b(a), 即上面所述的A(a)结果发生3 |, A, c& m9 e- _2 z
投注主客的期望回报总数分别为
' Q4 [, g' g M3 m# |: CE[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))5 x6 Z4 m1 G* f* z& Y, X
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)]
+ e9 U' H/ [+ d6 ]9 n6 ~2 ^和上面计算过程相似,得出:
& |$ I2 t7 s$ t1 @E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
( j0 J% F0 f3 NP(d)×{[O(h)+1]/2}+P(h)×O(h)=1 I# v' `8 k1 P8 g4 N& G: [
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
1 |0 ~( K; [. i. b+ HO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h)) }2 L3 V$ V; F" z6 M: w/ b1 h
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
- H& ~, ?. i/ w1/2×P(d)+P(a)*O(a)=1
: L7 p7 e4 g6 G2 v% A/ k" n; m. yO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
) m: }2 V4 ?. U% q6 c同样主队让平半就分别是
, X; W' Z( G- E7 o2 Q7 _7 QO(h)=(1-P(d)/2)/P(h)
" V q" l* g& B- j; oO(a)=(1-P(d)/2)/(P(d)/2+P(a))
/ y e& Y0 z6 X7 l- x$ J1 P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)
4 d6 a: W4 V$ ?7 x$ O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 b! U, L, @- l1 l0 W8 t Y+ A
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}' `6 T' q* \; {6 q
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
* R- v% C! k2 V6 Z" N# YB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数+ y+ [1 d6 Z2 ?, b
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:+ d. D/ O8 d: @
{b(h)*O(h) , 即上面所述的B(d)结果发生
7 U l8 Z6 o" W" O$ FR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
- ]( y, y3 L; D) f4 e{0 , 即上面所述的B(a)结果发生
1 u5 i9 \, n3 s, ?/ F! h N以及
Z$ t8 o4 }- Y9 [; {( [{b(a) , 即上面所述的B(d)结果发生: S$ N, s% o9 L& g3 q
R(2)={0, 即上面所述的B(h)结果发生& a2 X6 x9 O! ?* g
{O(a)*b(a),即上面所述的B(a)结果发生
0 X6 |$ h9 ] A `" h投注主客的期望回报总数分别为: w) P5 y+ b; g2 N8 C
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)]
, e' }3 g; f3 s, b! ^" d, ^E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))9 S2 o- Z$ Z1 g
假设实际投注回报与期望投注回报相等
. P. C' w8 w$ Z% K& v$ R G0 Z: XE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
& z' i n5 L6 F1 Y+ P% }+ nP(h)*O(h)+P(h1)-P(h1)*O(h)=1+ r7 X' G3 ]6 |4 y: w
O(h)*(P(h)-P(h1))=1-P(h1)5 n. t# A: R+ i8 D+ [
O(h)=(1-P(h1))/(P(h)-P(h1))5 n# @# l0 r" V
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)* [: j2 b# e. M8 x
P(h1)+O(a)-P(h)*O(a)=1
$ K6 T; M4 Z7 Y k* ]3 FO(a)*(1-P(h))=1-P(h1)0 e- f& Q5 l& o6 N
O(a)=(1-P(h1))/(1-P(h))
8 d% g& K: h. Z0 C8 H$ Y2 I7 z3 P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) C) ]6 ^8 @( ~+ L. Y: z
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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