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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。7 D' a* Z: E# f8 Y, h5 V( W3 f
那么,平局、主胜、客胜就有以下表达式:/ S+ {7 I% U l+ `/ W7 \
A(d) = {W(ij)|i=j, i∈N, j∈N}6 t" G) l4 X$ p' {+ g9 }
A(h) = {W(ij)|i>j, i∈N, j∈N}
# _7 e* {1 r* M- o, b! w: bA(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]:# G1 Z: I9 y* G" K) A4 e3 F6 N
P(i)=P(Ai), i∈{0, 1, 2}
" a& m$ d( }$ r! F# S5 V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)- {* k) f/ F2 u0 o2 e
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 [' V2 M+ ]/ n! F; P+ s
{b(h) , 即上面所述的A(d)结果发生
; Q, S! f1 X' o: {# CR(1)={O(h)*b(h),即上面所述的A(h)结果发生$ W7 R5 x+ m0 K% M# }
{0 , 即上面所述的A(a)结果发生
z; P6 y2 ?" q R" ]以及9 G# W- |% k# R* K" y' i
{b(a) , 即上面所述的A(d)结果发生1 _: P2 t6 n. {& O9 B2 |
R(2)={0, 即上面所述的A(h)结果发生
& }0 n5 a" T4 ?' Y7 [2 a# g( E{O(a)*b(a),即上面所述的A(a)结果发生
8 [! g9 y, K& [* v2 w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
) a" h# @; R& q- l那么投注主客的期望回报总数分别为
2 ^3 y9 e4 n! X9 y" w a! F* TE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
! [: _7 @; D$ n! gE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
. u" k2 E Q: i( H; k: E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
! j" K( i4 N j# x; Y9 {/ c2 pE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
2 F0 P' B$ y, Y) }P(d)+p(h)O(h)=1
& K, _. z# t: P0 A& tO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式
5 k" i# u3 `5 D4 t$ ME[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
/ P9 _! H( u4 {0 Q2 B) ~1 pP(d)+p(a)O(a)=1
/ H% `# y* `, C9 O9 iO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式
: }, d6 t* n: D9 C) A& ~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 s1 V. Q9 p# T$ w三、半球盘的计算描述
5 t, K( S! Z' ]; Y- o# o接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
2 I% s3 H8 W" B. q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:+ P' T, {5 Y/ |0 l/ {( d$ W. U
{O(h)*b(h),即上面所述的A(d)结果发生
* w' o6 t4 ~2 |5 g4 [' [R(1)={O(h)*b(h),即上面所述的A(h)结果发生4 e2 E& K* K. \' [
{0 , 即上面所述的A(a)结果发生
! ], Q5 m, d8 j8 r- z0 M: D) L9 l以及) R4 M, f+ a2 c$ X8 u" N: \: ^
{0 , 即上面所述的A(d)结果发生/ q! I% o( I n2 t# L
R(2)={0, 即上面所述的A(h)结果发生/ M# d( N/ o6 M% M% y
{O(a)*b(a),即上面所述的A(a)结果发生9 N% q+ C1 O6 J* {' j- |. L9 k
如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
) y7 X& O4 \3 l投注主客的期望回报总数分别为) x& k& j K, ]( I- [
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$ h; f! x) A6 @E[R(2)]=P(a)*O(a)*b(a)0 D6 v" |" Z) m4 W, U
假设实际投注回报与期望投注回报相等+ g o1 G1 Z' G' P `; w
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
9 _( q$ h, S5 X9 }9 IO(h)*[P(d)+p(h)]=10 e' a! P1 F- y: D
O(h)=1/[P(d)+p(h)]
* O3 ], C: s. l/ ^0 I# E- DE[R(2)]=P(a)*O(a)*b(a)=b(a)
1 q! t8 o' I! y8 x) y' E* VP(a)*O(a)=1
) l% T5 n; `" q5 ~O(a)=1/P(a)* {! b4 G3 v- k2 k- a2 _1 ]
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率7 v/ j0 E# a$ c9 `0 G/ f; a6 Q
O(h)=1/p(h)( k1 ]& W4 n' ]% I& H/ i) e E
O(a)=1/[P(d)+p(a)]- l% y8 R3 X2 K: ~ B! e
四、平半球盘的计算描述
2 c+ V& k* Y k& I5 v这个稍复杂一点
) K0 N: W& f u5 f4 v; ] Z接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)2 D J( H4 l$ n( [7 x. R0 x- u9 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:1 S& K1 G, N; \' [; T
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生7 I% ^' `4 i& w7 [# u# a
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
6 O! q) \ t# j7 b3 U% H- f7 S{0, 即上面所述的A(a)结果发生2 ]2 H! h8 c. x+ {. O
以及
. z( h+ x: U) }& H9 ]9 u3 s& g{1/2×b(a) , 即上面所述的A(d)结果发生
1 J& _8 X; u5 n0 n2 v( X2 x9 y- HR(2)={0, 即上面所述的A(h)结果发生
/ E) \' {6 s) k g2 y1 b: R{O(a)*b(a), 即上面所述的A(a)结果发生
, [0 f7 Y7 Q9 }% i$ J/ a投注主客的期望回报总数分别为
+ N$ I d e3 V3 XE[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 |+ b8 \+ j& D& `/ mE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]% Y4 e3 j0 q2 F
和上面计算过程相似,得出:
0 P8 N. h3 r* H- l" a( R0 L* jE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
& U* f, ~$ E5 P$ K9 j( }- m+ JP(d)×{[O(h)+1]/2}+P(h)×O(h)=1. _3 t2 z. x1 \# s' o4 t; J
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=13 C/ R6 s1 K* S7 k9 V5 X
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
/ n: ^& \) R, _' {2 NE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)) E+ ]! c2 \8 u) \ d1 T; k
1/2×P(d)+P(a)*O(a)=1
) e" R& H0 q( E H' JO(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)4 M; {$ F3 A5 @
同样主队让平半就分别是- ~" |$ g) d) d0 V
O(h)=(1-P(d)/2)/P(h)* n3 U5 h' V. g# X2 j* [
O(a)=(1-P(d)/2)/(P(d)/2+P(a)). E3 `" U. {* A1 D `/ d( J
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)
" K: A' d2 Z0 g8 I6 |, 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6 Z. Z* y! q+ ?9 M6 I, }
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
0 u5 F0 r) n/ RB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
# i8 u* i1 B5 X# q! xB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
1 q7 W4 Z& d. Q' ^) O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:$ t3 ~8 I( t: X, `) s' x; J
{b(h)*O(h) , 即上面所述的B(d)结果发生
5 z6 N/ E; Q c) c0 |R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
' Y$ a6 z' ]* {4 ]) o" Y, c{0 , 即上面所述的B(a)结果发生
& X. a# ^5 Q# l; F& I2 K以及
0 f; x) i' m: [{b(a) , 即上面所述的B(d)结果发生6 P4 d! Y6 O. Y
R(2)={0, 即上面所述的B(h)结果发生/ Y& J% @6 S, W
{O(a)*b(a),即上面所述的B(a)结果发生
2 @( `. J) B2 R9 t, D1 M投注主客的期望回报总数分别为: S* f) F B( C I
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)]
& {# P0 ^9 o L, N" G" Y! NE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
+ M" B) X9 q) H. @假设实际投注回报与期望投注回报相等
3 B K3 K+ b7 R* j( pE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)& X/ u) n2 G/ ]
P(h)*O(h)+P(h1)-P(h1)*O(h)=1. ?) b( z8 d. h0 X
O(h)*(P(h)-P(h1))=1-P(h1)
" b6 l! |" _; k4 n3 r3 fO(h)=(1-P(h1))/(P(h)-P(h1)), x" V/ G Y/ k! O
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)' g1 E6 _# g3 a5 d
P(h1)+O(a)-P(h)*O(a)=12 e& e2 w0 f7 i/ j
O(a)*(1-P(h))=1-P(h1)
7 b0 @3 j% Z* q& SO(a)=(1-P(h1))/(1-P(h))
9 J1 x; E! l8 e$ n8 s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。
- F G l; a2 h8 _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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