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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。
A( q- W9 M3 ?/ C2 P那么,平局、主胜、客胜就有以下表达式:
) g- D$ H! E6 V0 D' W+ _4 `1 lA(d) = {W(ij)|i=j, i∈N, j∈N}
9 M+ [7 s* ^ O8 }7 ?* l* MA(h) = {W(ij)|i>j, i∈N, j∈N}
5 V) z8 A \8 T/ b( D* hA(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]:& | U7 }" f/ c4 W
P(i)=P(Ai), i∈{0, 1, 2}. h: L6 T" n* \1 }* J3 C
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)0 v0 D' }) D, U" W
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- p) R5 _! V( Z
{b(h) , 即上面所述的A(d)结果发生! R9 w# Z! w( j
R(1)={O(h)*b(h),即上面所述的A(h)结果发生+ N1 ^# k$ d- T& U2 E
{0 , 即上面所述的A(a)结果发生# h3 W; w& I# m4 R% \0 l9 k
以及+ j. ^- T& o: c$ O
{b(a) , 即上面所述的A(d)结果发生
* m3 m1 P! c& O; `4 aR(2)={0, 即上面所述的A(h)结果发生
1 ^; m8 z0 q* }- |0 P% |{O(a)*b(a),即上面所述的A(a)结果发生
* r* B9 B6 p3 _2 C9 c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
9 U; ~! D! U" Z& O1 @5 A4 g; J那么投注主客的期望回报总数分别为9 [( z' M9 S; [/ l3 l* u
E[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
" T8 P7 w: U% G! K. zE[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]
" d8 `# p& y1 y2 w: N. B) Z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
; K; @9 N; [* B. NE[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h)
1 ~* `4 D3 q3 rP(d)+p(h)O(h)=1$ z( {+ A7 C( |
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
9 k& C! A" ~! @( Q6 tE[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a); ^0 o0 y' A: I: Y Z$ v! X, o
P(d)+p(a)O(a)=16 q. w. \+ p+ C+ K6 a
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
m, z7 l. o$ G) p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, w/ O, K* m% z
三、半球盘的计算描述3 }/ {: {5 z% A2 r/ J
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)0 ?" B: `/ w+ W# S ^
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:7 L2 P2 q) ]/ D: v
{O(h)*b(h),即上面所述的A(d)结果发生
1 Y: b9 h" ~! ~8 S8 aR(1)={O(h)*b(h),即上面所述的A(h)结果发生
& I" f1 L: m, k6 w9 O# V{0 , 即上面所述的A(a)结果发生
5 N2 E9 F1 |: u Z# E. n0 Y以及
- B" c8 w& B, K* t{0 , 即上面所述的A(d)结果发生- S; r$ Q8 g+ q! `) G: o
R(2)={0, 即上面所述的A(h)结果发生
1 @0 H' v9 D% ?4 z{O(a)*b(a),即上面所述的A(a)结果发生
9 @) C' P/ t' f2 E; J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 J( K, a( q. R' W8 M" X( p
投注主客的期望回报总数分别为+ v" k+ |* Y0 l6 m( O% v8 Y. f
E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]" ?+ c. f# W, K$ P- D* u' r
E[R(2)]=P(a)*O(a)*b(a)% U$ q8 z/ [# F9 d( a
假设实际投注回报与期望投注回报相等
8 f8 u$ K8 V' w ^! IE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
/ {' t3 T3 m' ?1 M( n$ k5 R) v2 bO(h)*[P(d)+p(h)]=1
, x, A. ?! N" a+ E9 S3 n- xO(h)=1/[P(d)+p(h)]4 { T: F. X/ V" R- n+ x
E[R(2)]=P(a)*O(a)*b(a)=b(a)
' N# p+ R9 f+ ~9 F, \2 GP(a)*O(a)=1& m6 w4 @ i$ t5 z
O(a)=1/P(a)4 Z% t* Q r* F. {3 c
同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率5 J. `* f+ q8 d& O1 S- i
O(h)=1/p(h)
1 Z/ G8 ]- r, y* ?O(a)=1/[P(d)+p(a)]
+ N: J1 {8 O% k8 U, |四、平半球盘的计算描述- e% n- X9 K$ |* t# d
这个稍复杂一点* J5 D: c6 @ E7 F- @# A9 j/ ~ j
接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况)5 l% z) Q8 R- ?, @4 t$ j/ R) ^! j
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:. o, a$ [+ [. V) |6 {1 e( Y3 M
{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
1 G) O6 n# g$ b4 }R(1)={O(h)*b(h), 即上面所述的A(h)结果发生. A) f6 Y! r' ]6 V R
{0, 即上面所述的A(a)结果发生7 D/ n6 L P0 c
以及+ S T: V Z: l. x% J: \# f& Q2 {2 f [
{1/2×b(a) , 即上面所述的A(d)结果发生
; y7 {2 E" T8 I9 i1 `& Y7 U3 t* RR(2)={0, 即上面所述的A(h)结果发生
; [5 b* Z; q% r# b" H{O(a)*b(a), 即上面所述的A(a)结果发生
' e ?* @3 q' s3 [* [投注主客的期望回报总数分别为! n- C7 \* D, M3 ^4 e8 h8 |
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))
. `* u, @9 Z3 W' E( n4 fE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]
0 A% ]" h/ o& p& }( f和上面计算过程相似,得出:$ n. K; _9 J& y
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)( T* [1 M, O- z' K4 A. _
P(d)×{[O(h)+1]/2}+P(h)×O(h)=1* t- [. W- R+ C- M5 v
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=1
/ |6 K% q% W% ZO(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))
0 N5 o) B8 [) W& H& F, t$ eE[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
3 g6 P! I2 ^/ z6 {. R0 B$ a0 w1/2×P(d)+P(a)*O(a)=1, w& D+ T- G$ M# N+ g0 j! W3 F
O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)7 Q/ d- M: }+ ~$ M# n6 a$ E
同样主队让平半就分别是! F' Y/ w: C% O1 c8 x
O(h)=(1-P(d)/2)/P(h)
, l5 S0 p: f+ B" Z" lO(a)=(1-P(d)/2)/(P(d)/2+P(a))
; [: u' {* h8 E) P" `. w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). ^& \7 e4 V, V( P* @
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
0 i& b& A& Y2 x( h) _ QB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}
, i q8 W/ C+ Z% b7 o$ C8 X7 I: jB(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}
% \; Z5 L: ?/ c, ]% p( y& QB(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数" ]' t% @8 p+ v$ G3 a9 w
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:# U: D- z1 ?7 [4 f
{b(h)*O(h) , 即上面所述的B(d)结果发生+ N# o/ p, d* f: b% w8 S4 ^
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
: }( p7 b- {! m( o{0 , 即上面所述的B(a)结果发生9 @1 D/ \( T# U3 z0 D
以及
! F4 c, V5 |* }# S$ e d{b(a) , 即上面所述的B(d)结果发生7 n! |3 B' M- c2 B5 a1 ?& }
R(2)={0, 即上面所述的B(h)结果发生
+ [, ]; p+ v s{O(a)*b(a),即上面所述的B(a)结果发生# L1 O- W5 z, M0 v- \% B0 m5 [6 N
投注主客的期望回报总数分别为1 H1 T& @9 s: Z0 q" ~! |/ S
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)]
6 O* A$ l0 _& G3 U) UE[R(2)]=P(h1)*b(a)+(1-P(h))*O(a)*b(a)=b(a)*(P(h1)+O(a)-P(h)*O(a))% P1 k( W4 q# [
假设实际投注回报与期望投注回报相等
7 Y8 ] F% B/ v9 w9 Z/ E7 DE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
' |5 J+ m! Q( r4 c7 _0 ZP(h)*O(h)+P(h1)-P(h1)*O(h)=1" T1 i! F" I+ G- x6 W& n
O(h)*(P(h)-P(h1))=1-P(h1). ~6 S) _4 }# {
O(h)=(1-P(h1))/(P(h)-P(h1))2 X1 Y4 x8 H/ m3 X& N
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
$ E3 ^0 N$ j N4 c2 d' \6 JP(h1)+O(a)-P(h)*O(a)=1
6 u- A3 D% `9 ?8 uO(a)*(1-P(h))=1-P(h1)& n" U+ E" f4 ^3 d& m) D
O(a)=(1-P(h1))/(1-P(h))
; T8 l+ L1 h( 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。
M" \0 R: z, y% e2 p! i# A C1 S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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