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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。; k' m6 o, G5 j& d# W. V% y
那么,平局、主胜、客胜就有以下表达式:
8 D1 e1 D) j2 N/ B( V# h0 v+ hA(d) = {W(ij)|i=j, i∈N, j∈N}
! Y6 A [/ V. N9 e- \A(h) = {W(ij)|i>j, i∈N, j∈N}; N, j# s+ x3 q, M, d
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 G$ J, p* ^% Z( c# j
P(i)=P(Ai), i∈{0, 1, 2}
+ e4 E$ T0 @! H% ^. 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)# W% N6 Z) ~3 ]! b$ j
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:) W1 Q% D2 b1 J. f
{b(h) , 即上面所述的A(d)结果发生
1 }; d& H+ |; tR(1)={O(h)*b(h),即上面所述的A(h)结果发生# P' |9 B# s9 w7 T$ x& ?5 ^
{0 , 即上面所述的A(a)结果发生* e u! a& K( I. l9 U5 V
以及
8 A8 ^7 J {% V! N; {, V{b(a) , 即上面所述的A(d)结果发生
2 N4 `6 o, w/ d! V- ~ _R(2)={0, 即上面所述的A(h)结果发生
, P+ \; a1 V. Z0 A1 F( i D{O(a)*b(a),即上面所述的A(a)结果发生
) O5 ]2 n! X- x% X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$ x0 T; _! P' a; q
那么投注主客的期望回报总数分别为
! n# f" |, @% \* C; q% L* O$ G' K( \E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
( ?$ C7 B$ b/ z' a: }5 {9 B& H BE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
$ g( e( Z8 u; y9 b6 p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# @' N- \0 ]: ~
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
9 ^2 f8 V& [- u1 @2 C! _P(d)+p(h)O(h)=16 n2 f& `. v+ `( A
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; @$ k# O3 G6 o# O* K( l9 G& s' |
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)- V: g; u! }% J, J q' j" o
P(d)+p(a)O(a)=1
9 S4 H _* ^& n3 T* F: m* i+ z9 z9 ]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
# \9 s8 S& a8 W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( K" L3 p, ~2 u" Y
三、半球盘的计算描述
6 p/ { c9 B, p( R8 g接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)
, i7 ]& p) X2 ?# t& L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:/ i) O# i( z" H
{O(h)*b(h),即上面所述的A(d)结果发生$ L- m' k" C* z/ L7 P! j, k
R(1)={O(h)*b(h),即上面所述的A(h)结果发生
: O |( i3 k- D' _% ^6 }( t( q{0 , 即上面所述的A(a)结果发生$ ~3 D% @; O3 \$ `. z& E! k
以及( Z6 q; r# y1 V0 M0 {2 y9 T5 i ^) x
{0 , 即上面所述的A(d)结果发生
5 P* [ r9 p- P& k4 CR(2)={0, 即上面所述的A(h)结果发生
2 q7 p; ?6 l3 b- z9 G8 }8 i0 A8 @{O(a)*b(a),即上面所述的A(a)结果发生
0 A1 z$ ^2 y2 Y3 b3 ^如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率% s& b1 s z$ ?, X
投注主客的期望回报总数分别为2 {" p2 f' B/ e2 A+ x' [/ r
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
9 V; N" [- R( ~" u9 t1 AE[R(2)]=P(a)*O(a)*b(a)* j0 L; Q+ m6 W3 B% e r
假设实际投注回报与期望投注回报相等" N% w4 |& a4 d8 g, [0 v5 Z8 V' ~3 W
E[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
) q2 H* e2 E ~O(h)*[P(d)+p(h)]=19 O6 |* u3 d0 N3 i+ o" a q) ~
O(h)=1/[P(d)+p(h)]) c/ h9 a$ y; J
E[R(2)]=P(a)*O(a)*b(a)=b(a)
6 i* D. R5 Q+ ?9 FP(a)*O(a)=1
4 T. _+ b+ G& uO(a)=1/P(a)- o" D# ~$ W4 ]7 ?# b
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
) p+ I& g+ N, U7 K: m/ \" [O(h)=1/p(h)
7 o1 O/ k, E* I9 ]1 w6 K' e( N) \O(a)=1/[P(d)+p(a)]& f$ l ]& e7 n' A9 w% _4 ]
四、平半球盘的计算描述
( O! c1 [6 N' P% `0 w% A这个稍复杂一点0 \2 |8 [: O) O! W h1 p6 x! A2 K
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)( [$ l% x; Z: K6 Q5 Z2 C+ y \9 X
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% v' i4 @# p6 ], H; g0 h: }2 G1 ^{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生5 h9 s9 o# o" E( C
R(1)={O(h)*b(h), 即上面所述的A(h)结果发生
5 S( b5 ?& y: s5 q5 h{0, 即上面所述的A(a)结果发生
& i* P& U- T) K7 k: ]8 H以及/ Q7 A5 R7 D: D6 _5 N
{1/2×b(a) , 即上面所述的A(d)结果发生
2 e# H' r# y9 j1 ZR(2)={0, 即上面所述的A(h)结果发生4 B& ~9 d3 u- _) {5 a C- u) ^
{O(a)*b(a), 即上面所述的A(a)结果发生
8 T: a! e! q, ]1 L投注主客的期望回报总数分别为% _2 ^* Q$ M, V$ X/ r+ U6 d5 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))
2 e2 G* ?* \$ s' IE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]
3 }2 p* L2 H U和上面计算过程相似,得出:. W. B; ^0 d" p1 J
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)# N& v8 A" ?7 s4 f: Z N3 }
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1. ]1 r8 V- T7 ?% m! F0 L/ c
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
- u) }& \+ H9 c+ M, L9 \O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))* E, \5 u6 i( E$ H0 A
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
* e% H/ m) I* v( Y/ Y6 X: C# s1/2×P(d)+P(a)*O(a)=1% e) T; h+ x1 k
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
. a- f% {- V3 m& M$ B: z }8 b同样主队让平半就分别是' ?: x$ h+ m8 w1 t. W
O(h)=(1-P(d)/2)/P(h)0 l6 Q* h# P* n" y9 R3 a: P
O(a)=(1-P(d)/2)/(P(d)/2+P(a))
c( \! [7 S* E( \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)
a& P7 b# ^9 N" S# 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4 p1 ?3 O- k' D+ ^
B(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}3 b6 |( l- U& { f9 r3 Y3 w
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}3 I/ U l$ b* B9 w0 p* i6 s
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数9 y' D0 k5 s0 m: J4 I( 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:
- o1 d3 A# _* ^& Y$ Y: w& l{b(h)*O(h) , 即上面所述的B(d)结果发生
h- ^& G4 H/ o- W: {/ u+ lR(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
2 f: v* O9 s C0 }{0 , 即上面所述的B(a)结果发生
9 U1 m4 m! t0 n- k( w$ D" i以及
6 ~' M' b7 F, S+ v$ s$ p{b(a) , 即上面所述的B(d)结果发生
6 e; S6 x/ U" r# y8 E VR(2)={0, 即上面所述的B(h)结果发生6 t' b! c4 |2 C- |) U
{O(a)*b(a),即上面所述的B(a)结果发生* g6 T d4 [! d6 l
投注主客的期望回报总数分别为
% N) }! P3 _7 D' D5 Q' s+ PE[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)]# c( [& `. ]! _+ v0 U& ^
E[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))
: E" H8 j! W# ]1 d% D假设实际投注回报与期望投注回报相等+ c7 F- i' c( j1 w" |) A, S
E[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h): M4 |" x ], S% @
P(h)*O(h)+P(h1)-P(h1)*O(h)=1$ @" T3 M+ T, q$ n, j2 g& Z
O(h)*(P(h)-P(h1))=1-P(h1)
4 r% X0 j& t. KO(h)=(1-P(h1))/(P(h)-P(h1))% {" Z( k$ K9 e8 Q/ U7 @9 v" R
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
$ P# ^) B* x1 x$ D, O5 zP(h1)+O(a)-P(h)*O(a)=1
; p8 V- {' z9 b0 g- r4 N- bO(a)*(1-P(h))=1-P(h1)
! W/ H* y, C) z0 u0 oO(a)=(1-P(h1))/(1-P(h))
& a3 C% f d6 F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" [ l7 a7 L- p+ S5 l% L7 W
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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