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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。3 t! c! s5 X k; I2 X+ J7 n7 ]
那么,平局、主胜、客胜就有以下表达式:, p3 Q3 _$ E4 O
A(d) = {W(ij)|i=j, i∈N, j∈N}
# U& e a- G, ~( oA(h) = {W(ij)|i>j, i∈N, j∈N}2 u; ` u y: [
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]:) Y( `2 _, Y Y! l& y, |6 I1 `' t/ \3 `
P(i)=P(Ai), i∈{0, 1, 2}
1 k( X" O# J+ j- L% ^0 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)
1 y8 r& i2 S5 e: W6 o4 n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 G: ]; K! o' V- z: B; v" V{b(h) , 即上面所述的A(d)结果发生
- g, M" D z# vR(1)={O(h)*b(h),即上面所述的A(h)结果发生
+ m y' D' q8 W9 {/ D% a! g' R{0 , 即上面所述的A(a)结果发生9 t! v5 w1 p4 I" J8 Q, s+ g6 S+ V
以及# E( V: f4 X" @* p2 P
{b(a) , 即上面所述的A(d)结果发生
1 ]) T$ A# f5 d% G+ \7 @) o8 OR(2)={0, 即上面所述的A(h)结果发生* u+ h" I( q. x7 X7 t: Z
{O(a)*b(a),即上面所述的A(a)结果发生
% C) j6 V. J# }" Y# P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
3 t: \0 ?! j @0 a: O那么投注主客的期望回报总数分别为
7 |: N8 Q! m6 `$ J+ |) V+ M0 E( nE[R(1)]=P(d)*b(h)+P(h)*O(h)*b(h)=b(h)*[P(d)+p(h)O(h)]
: k) s/ J& T, {3 _. M* ]E[R(2)]=P(d)*b(a)+P(a)*O(a)*b(a)=b(a)*[P(d)+p(a)O(a)]( V$ G- |) h- E' e' a- 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& l3 }8 |+ Z6 M) z3 t
E[R(1)]=b(h)*[P(d)+p(h)O(h)]=b(h), w/ C- y ]7 W: A
P(d)+p(h)O(h)=1
& q8 b# n" k, a& a+ j( oO(h)=(1-P(d))/P(h)-----这里就得出平手盘下计算主队赔率的公式. i$ `# Y4 B: f
E[R(2)]=b(a)*[P(d)+p(a)O(a)]=b(a)
4 N7 L! N3 J: s6 t1 bP(d)+p(a)O(a)=1
4 n2 Y! r' D3 Y3 ~, w6 ?! AO(a)=(1-P(d))/P(a)-----这里就得出平手盘下计算客队赔率的公式
# o1 {9 q1 v) C) n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* Y# Q/ k; \; e' J, z) i' M
三、半球盘的计算描述( w/ N! k( ?, ~+ U& G7 {+ y
接着我们来看看主队(HOME TEAM)受半球(1/2:0 Handicaps的情况)) O! v7 W3 C) 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为:) O' m. L& b# D" f9 a
{O(h)*b(h),即上面所述的A(d)结果发生
8 ?8 n8 V% W6 j- l. d) K9 X8 PR(1)={O(h)*b(h),即上面所述的A(h)结果发生
! B' g. S2 R& ~5 e{0 , 即上面所述的A(a)结果发生
! s4 b- d, f% Q+ Q: Q: l* T以及 m1 v6 @8 G+ s+ p8 b9 M
{0 , 即上面所述的A(d)结果发生
4 v* o; a; B b4 nR(2)={0, 即上面所述的A(h)结果发生0 ^* _6 [, S3 K; S0 p. w. X
{O(a)*b(a),即上面所述的A(a)结果发生
9 e1 a4 S- z6 R% z7 ~ a, ?# q; b如果O(h)表示受半球盘下的主队赔率,O(a)表示客队赔率
0 {3 U' r ]+ t4 N8 g投注主客的期望回报总数分别为
% A$ z$ h; i5 {E[R(1)]=P(d)*O(h)*b(h)+P(h)*O(h)*b(h)=b(h)*O(h)*[P(d)+p(h)]
- l% S/ V: u( k' K) s a, QE[R(2)]=P(a)*O(a)*b(a)
* U( i1 x% L' b1 z1 P' Z7 O假设实际投注回报与期望投注回报相等
) ?9 z% M# _, {8 @! P; a8 Z9 iE[R(1)]=b(h)*O(h)*[P(d)+p(h)]=b(h)
& x. v7 |, y! VO(h)*[P(d)+p(h)]=1; b3 y5 D: T K
O(h)=1/[P(d)+p(h)]
5 q) H) c, X2 p2 q* @E[R(2)]=P(a)*O(a)*b(a)=b(a)
# C5 i. m2 v5 J) {& m. W, dP(a)*O(a)=1
1 _% L, X0 ?, N& ]O(a)=1/P(a)
1 ^. J9 Q6 c1 b; w: `7 i% p( k# D同样道理可以计算让半球(0:1/2 Handicaps)的亚洲盘赔率
% o: L8 z: g! {8 `O(h)=1/p(h). C: }2 O% j* o/ v
O(a)=1/[P(d)+p(a)]
( k5 p% ? a3 u' _3 F: Y: ^四、平半球盘的计算描述
, K4 T/ B( E' @ d- _0 z$ Y4 M这个稍复杂一点
( |! H: {" T1 m$ ^接着我们来看看主队(HOME TEAM)受平半球(1/4:0 Handicaps的情况), z V8 h+ s \1 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:
- ]: O. Y T9 g! Y% S{[O(h)+1]/2×b(h), 即上面所述的A(d)结果发生
+ u# X* ~! I/ B* Y; m% d' k6 oR(1)={O(h)*b(h), 即上面所述的A(h)结果发生
! w- m; C; G9 p{0, 即上面所述的A(a)结果发生) u8 n& y" U- t$ D' {7 r
以及4 B- k+ O P% y& m0 n
{1/2×b(a) , 即上面所述的A(d)结果发生
. Q1 T. v0 g# PR(2)={0, 即上面所述的A(h)结果发生
( `) [1 e$ `( t2 R{O(a)*b(a), 即上面所述的A(a)结果发生 G* e7 D t- p' U* P- e: C$ p. P
投注主客的期望回报总数分别为
$ X" c3 @5 x& m$ p+ ^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))
! E4 ^3 X6 F4 c! vE[R(2)]=1/2×b(a)×P(d)+P(a)*O(a)*b(a)=b(a)*[1/2×P(d)+P(a)*O(a)]& G }5 g& Z9 R" c3 \! |6 X8 p
和上面计算过程相似,得出:: D& L; @$ f, g0 ^
E[R(1)]=b(h)*(P(d)×{[O(h)+1]/2}+P(h)×O(h))=b(h)
" q) C, H+ G& r) F M% EP(d)×{[O(h)+1]/2}+P(h)×O(h)=11 G6 c/ y7 c( O- U* c5 v1 _
O(h)*[1/2*P(d)+P(h)]+1/2*P(d)=18 A) t' a0 {8 B4 e5 h5 T2 A
O(h)=[1-1/2*P(d)]/[1/2*P(d)+P(h)]=(1-P(d)/2)/(P(d)/2+P(h))- ^3 X0 P. t& ^ D! q
E[R(2)]=b(a)*[1/2×P(d)+P(a)*O(a)]=b(a)
2 L% z9 J, g& a' U, ^0 }0 C1/2×P(d)+P(a)*O(a)=1
% ^' r! Z2 }! l3 I: ]O(a)=[1-1/2×P(d)]/P(a)=(1-P(d)/2)/P(a)
1 r8 E6 i# d3 p& I' Y同样主队让平半就分别是8 ~ q9 e- V- l" Q, Y) M
O(h)=(1-P(d)/2)/P(h)
( M1 G9 r( c) W! J2 u# |O(a)=(1-P(d)/2)/(P(d)/2+P(a))
3 A& P. U; W1 s( T! B+ y+ Q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)
. R Z, A e7 C3 Y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$ {9 _% K& a; K7 EB(d) = {W(ij)|i=j+k, i∈N, j∈N,k∈N}5 Z7 o' t5 b6 I
B(h) = {W(ij)|i>j+k, i∈N, j∈N,k∈N}5 p, C6 P! c0 `$ G8 f
B(a) = {W(ij)|i i,j分别表示主客队的进球数,k代表让球数* y3 u2 x& `3 i. A6 R
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:2 q' @& R# `! R0 W6 h+ }
{b(h)*O(h) , 即上面所述的B(d)结果发生/ K; B3 a" U% ]/ \7 k. R
R(1)={b(h)-O(h)*b(h),即上面所述的B(h)结果发生
( A; \( @, n3 S$ x6 F' ]2 b! @, o{0 , 即上面所述的B(a)结果发生
! |1 M/ o/ r- B以及
0 z+ J) f0 l' Z7 C) f{b(a) , 即上面所述的B(d)结果发生* f( Q' _+ H9 u1 v( c! f
R(2)={0, 即上面所述的B(h)结果发生* S( R \5 C. s: D+ r
{O(a)*b(a),即上面所述的B(a)结果发生
# X- E M, r, B; n# Z投注主客的期望回报总数分别为* d! B. X8 k+ g8 ?* B
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)]5 O! O5 L: Q$ g3 n- K1 g" T% J
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 y# p, z. b# x" x假设实际投注回报与期望投注回报相等
. c. ^ `) ], n) M( I p- D" hE[R(1)]=b(h)*[P(h)*O(h)+P(h1)-P(h1)*O(h)]=b(h)
y9 n v/ w1 C" _# t* rP(h)*O(h)+P(h1)-P(h1)*O(h)=10 x5 a# c$ ?: o9 t% d
O(h)*(P(h)-P(h1))=1-P(h1)
% Z1 G& J% \2 n. h8 QO(h)=(1-P(h1))/(P(h)-P(h1)), Q( o" t/ d" h6 v0 M1 m @9 J
E[R(2)]=b(a)*(P(h1)+O(a)-P(h)*O(a))=b(a)
. M0 T5 t- I) [9 N3 wP(h1)+O(a)-P(h)*O(a)=1
5 J' N, H, r; _+ WO(a)*(1-P(h))=1-P(h1)
% {4 H& i- r; W: x# w* Y0 FO(a)=(1-P(h1))/(1-P(h))
- U. }; @# N+ c$ `0 f! X6 M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。. R* N( X) N" v0 l& c
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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