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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。& O, E3 A$ X$ ?+ f) F( x, n& V
那么,平局、主胜、客胜就有以下表达式:
7 Q- a) r$ P$ Q/ y9 C hA(d) = {W(ij)|i=j, i∈N, j∈N}3 P! {% ?/ h& u C
A(h) = {W(ij)|i>j, i∈N, j∈N}9 p+ D( B, i+ V# a& @ o0 X
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]:
1 w l/ T- }3 g+ [P(i)=P(Ai), i∈{0, 1, 2}
! Q. b) J+ h5 ]) H5 a& 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)
. h) ?0 a, S6 u9 d5 _' g4 I; @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:
- g: R o" S& }( Y" x d{b(h) , 即上面所述的A(d)结果发生5 [ ~$ \% b/ [
R(1)={O(h)*b(h),即上面所述的A(h)结果发生* ~0 A! k8 b9 {# `. |* P
{0 , 即上面所述的A(a)结果发生0 N* I) w1 O4 M6 G3 k3 ?
以及
: Q5 C5 I. \" \$ W+ D{b(a) , 即上面所述的A(d)结果发生/ `: u) F7 y% V- O1 r( v5 V8 D. d
R(2)={0, 即上面所述的A(h)结果发生
g. j; E6 K+ s" s. [{O(a)*b(a),即上面所述的A(a)结果发生: c- L, b6 [0 h: A8 [1 E
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
- J4 w+ ^4 F K8 c. O" _那么投注主客的期望回报总数分别为4 X6 q& g- r( N3 X# M
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
2 C4 d% C4 O4 [2 C# bE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
: Q/ T9 T2 \! e! i; u1 L: a1 x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3 D( {- n; g; t; s3 U+ C
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h); W$ F3 N6 ~ ?8 C: W$ V* G
P(d)+p(h)O(h)=1
& j8 X1 C4 e/ j0 YO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式( S' {3 H! X: o5 W: B/ E
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)' j# T- F0 \: x4 a# k* U
P(d)+p(a)O(a)=1
! B p$ a9 `4 q2 lO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式* H+ A3 b1 _2 S" W s8 a0 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3 ]* N1 C- j3 Y0 }& e
三、半球盘的计算描述+ a7 A# d P' l+ j9 y& v
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)- x* {- g7 ?6 p
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:
$ h N* q8 n0 v# S+ b; H/ |{O(h)*b(h),即上面所述的A(d)结果发生& C! y- ?" ?4 i- M9 G$ V
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
8 k' a( o* S9 q9 N( f{0 , 即上面所述的A(a)结果发生
' S) O- i( M* j8 X3 H以及
0 R& }8 f% L! P% p8 ]2 W5 t+ C{0 , 即上面所述的A(d)结果发生 l+ a# z9 C4 Q" O9 [4 ~
R(2)={0, 即上面所述的A(h)结果发生, [( K: U% j0 D* m; N
{O(a)*b(a),即上面所述的A(a)结果发生0 K& N- F6 t a: _) S9 [( 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
_- ~/ M. f7 F" G投注主客的期望回报总数分别为
& C' J3 c: m8 ?6 d9 M* c+ G4 Y! |E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
% u% m0 D# u0 t8 c" SE[R(2)]=P(a)*O(a)*b(a)
$ ?+ v8 q' K, I0 b假设实际投注回报与期望投注回报相等
( A# K7 N G8 L! BE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
$ E9 ?* E6 W5 A7 }4 t o, DO(h)*[P(d)+p(h)]=17 ~) H% J1 q$ ~5 Q* d+ v4 b- O+ G
O(h)=1/[P(d)+p(h)]% K) Z1 J0 e4 }" l& n/ ~2 b. y8 ^; s
E[R(2)]=P(a)*O(a)*b(a)=b(a)
9 N9 B, d, {# n9 d7 w8 KP(a)*O(a)=1) z) V8 L8 C0 \0 l9 v- ]
O(a)=1/P(a)
$ j* Q F. D4 c& G- p- G. x% {& [同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
% ?7 V% v9 K. }) ~2 T3 B1 uO(h)=1/p(h)
3 z! w2 X( s& e9 D* v1 IO(a)=1/[P(d)+p(a)]
7 i P# f4 _9 P, N& u四、平半球盘的计算描述
' E' Q: c5 {6 T* y$ Z& F这个稍复杂一点# Z/ q# [5 X' `2 g
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)
" M3 n, d( S7 n% i. I2 K' Z# r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:# b) z' b! k2 o4 @5 w3 f
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
! V5 L0 P' K. Q* l% PR(1)={O(h)*b(h), 即上面所述的A(h)结果发生& e$ Y0 g4 Z R6 d# T M6 z( B: Y3 x; C8 J
{0, 即上面所述的A(a)结果发生# c/ B) K4 }- X5 v
以及
" ]8 G! r" ~, V/ t/ L{1/2×b(a) , 即上面所述的A(d)结果发生* i; u, D2 j' n' e6 Z) P
R(2)={0, 即上面所述的A(h)结果发生/ ?* c; l: Z) c% y& F% O" ^' H% E
{O(a)*b(a), 即上面所述的A(a)结果发生7 \7 k* W- \, c! s! @
投注主客的期望回报总数分别为% w1 Q F2 k$ R. G; w1 |' m
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)); h! u6 E! W) G3 V1 f
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)]
- X$ K0 B5 w* \: y2 s& E% {0 Q和上面计算过程相似,得出:
# H5 t5 k, } u! r# X) ZE[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
# Y3 f1 L4 n' N* R) m) R/ mP(d)×{[O(h)+1]/2}+P(h)×O(h)=1# v. g3 r! c+ [& \" U
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
# @* e+ v0 Q' U3 EO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))7 L/ g( ]8 I" O0 ?
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)3 X5 g0 _$ _4 l) N* ]
1/2×P(d)+P(a)*O(a)=13 c3 Y# r, P4 M+ T5 A
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)7 ^3 j/ L5 I. `# C* ^. p1 Q
同样主队让平半就分别是2 e$ z; b f9 K. o/ k, g/ E
O(h)=(1-P(d)/2)/P(h)
* r8 G) ~7 H# e- C( ^0 yO(a)=(1-P(d)/2)/(P(d)/2+P(a))
1 J" G u3 h2 a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)% b9 X( b* D, \, 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
+ Y: J; L/ v5 eB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
( `4 g O# g7 L- t$ EB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}! O) V ~) _. `$ _7 L' K
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数
" \! W1 w2 L3 Q- g0 t2 a6 ~8 S3 C' i! Q" u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:
% m, T+ V4 ?2 h. w' S6 U( G{b(h)*O(h) , 即上面所述的B(d)结果发生
5 G$ W& W- g* ?' t' IR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
1 n9 P/ X2 Z+ Y{0 , 即上面所述的B(a)结果发生. W' \& C0 v [2 }( C( @
以及8 q) R! b7 y* D7 x/ @& P
{b(a) , 即上面所述的B(d)结果发生7 b6 \% \7 f" ^, ]1 N" h
R(2)={0, 即上面所述的B(h)结果发生
" |4 _2 C |1 y* W# a{O(a)*b(a),即上面所述的B(a)结果发生
! W6 R9 J: p: I4 I5 Y投注主客的期望回报总数分别为
, _/ @, n& W5 v0 ?& s/ R# oE[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)]$ _! j0 q" L" D9 B& ]
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a)). ~$ K, y3 G) O/ `5 _9 C
假设实际投注回报与期望投注回报相等3 H$ t7 ^, q$ j) [: @
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h). v4 x! l6 B- U$ y
P(h)*O(h)+P(h1)-P(h1)*O(h)=1
, m) p. {8 H8 R6 x, F' qO(h)*(P(h)-P(h1))=1-P(h1)
, ], Y& j$ \1 \) aO(h)=(1-P(h1))/(P(h)-P(h1))* N6 G4 ~ T* g
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
7 _; p! k4 f+ E( R" NP(h1)+O(a)-P(h)*O(a)=1
% @# b: F$ d7 B- I' ?O(a)*(1-P(h))=1-P(h1)
1 n; K% B+ w: JO(a)=(1-P(h1))/(1-P(h))/ [3 T$ J8 e9 ?7 P0 C
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 r4 y6 q; j2 G& 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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