Je t’ai fait un graphique du joueur offensif pour le jeu (0,1) 2 street, avec les calcule en dessous, pour t’aider à y voir plus claire.
Calcul des équations d’indifférence multi street
EV bet thin check = (Pt + Bt) (x1t – y1t) + (pt) (1 – x1t) – Bt (y1t)
EV check check = Pt (1 – y1t)
(Pt + Bt) (x1t – y1t) + (pt) (1 – x1t) – Bt (y1t) = Pt (1 – y1t)
Pt (x1t – y1t) + Bt (x1t – y1t) + (pt) (1 – x1*t) – Bt (y1t) = Pt (1 – y1t)
Pt x1t – Pt y1t + Bt x1t – Bt y1t + pt – pt x1*t – Bt y1t = Pt – Pt y1t
Bt x1*t – 2 Bt y1t = 0
x1*t = 2 y1t
EV bet strong bet thin = Pt (1 – x1t) + (Pt + Bt) (x1t – x1r) + (Pt + Bt + Br) (x1r – y1r) – (Bt + Br) y1r
EV bet strong check = Pt (1 – x1t) + (Pt + Bt) (x1t – y1r) – Bt y1r
Pt (1 – x1t) + (Pt + Bt) (x1t – x1r) + (Pt + Bt + Br) (x1r – y1r) – (Bt + Br) y1r = Pt (1 – x1t) + (Pt + Bt) (x1t – y1r) – Bt y1r
(Pt + Bt + Br) (x1r – y1r) – (Bt + Br) y1r = (Pt + Bt) (x1r – y1r) – Bt y1r
Br (x1*r – y1r) – (Bt + Br) y1r = – Bt y1r
Br (x1*r – y1r) – Br y1r = 0
Br x1*r – Br y1r – Br y1r = 0
Br x1*r = 2 Br y1r
x1*r = 2 y1r
EV bet bluff strong check = Pt (1- x1t) – Bt (x1t)
EV check check = pt (1 – y0t)
Pt (1- x1t) – Bt (x1t) = pt (1 – y0t)
Pt - Pt x1t – Bt x1t = Pt – Pt y0t
(Pt + Bt) x1*t = Pt y0t
x1*t = y0t Pt / (Pt + Bt)
EV bet bluff thin bet bluff = (Pt + Bt) (x1t – x1r) + Pt (1 – x1t) – (Br + Bt) (x1r)
EV bet bluff thin check = pt (1 – x1t) – Bt (x1t)
(Pt + Bt) (x1t – x1r) + Pt (1 – x1t) – (Br + Bt) (x1r) = pt (1 – x1t) – Bt (x1t)
(Pt + Bt) (x1t – x1r) – (Br + Bt) (x1r) = – Bt (x1t)
Pt x1t – Pt x1r + Bt x1t – Bt x1r – Br x1r + Bt x1r = – Bt x1*t
(Pt + 2 Bt) x1t = (Pt + Br) x1r
x1r = x1t (Pt + 2 Bt) / (Pt + Br)
x1r = x1t (Pr) / (Pt + Br)
EV call thin fold = (Pt + Bt) (y0r – y0t) – Bt (1 – y0r) – Bt (y1t)
EV fold = 0
(Pt + Bt) (y0r – y0t) – Bt (1 – y0r) – Bt (y1t)= 0
Pt y0r- Pt y0t + Bt y0r – Bt y0t – Bt + Bt y0r – Bt y1t = 0
(Pt + 2 Bt) y0r - Pt y0t – Bt y0t – Bt – Bt y1t = 0
(Pt + 2 Bt) y0r - (Pt + Bt) y0t - Bt - Bt y1t = 0
(Pt + 2 Bt) y0r - Bt - Bt y1t = (Pt + Bt) y0t
y0r (Pt + 2 Bt) / (Pt + Bt) - Bt / (Pt + Bt) - y1t Bt / (Pt + Bt) = y0t
y0r (Pt + 2 Bt) / (Pt + Bt) - Bt / (Pt + Bt) - y1t Bt / (Pt + Bt) = y0t
1 – (1 - y0r) Bt / (Bt + Pt) – y1t Bt / (Bt + Pt) – y0r = y0t
EV call strong call = (Pt + Bt) (y1t – x1r) + (Pt + Bt) (y0r – y0t) + (Pt + Bt + Br) (1 – y0r) – (Bt + Br) (y1r) – Bt (x1*r – y1r)
EV call fold = (Pt + Bt) (y1t – x1r) + (Pt + Bt) (y0r – y0t) - Bt (1 – y0r) – Bt x1*r
(Pt + Bt) (y1t – x1r) + (Pt + Bt) (y0r – y0t) + (Pt + Bt + Br) (1 – y0r) – (Bt + Br) (y1r) – Bt (x1r – y1r) = (Pt + Bt) (y1t – x1r) + (Pt + Bt) (y0r – y0t) - Bt (1 – y0r) – Bt x1r
(Pt + Bt + Br) (1 – y0r) – (Bt + Br) (y1r) – Bt (x1r – y1r) = - Bt (1 – y0r) – Bt x1r
(Pt + 2 Bt + Br) (1 – y0r) – (Bt + Br) (y1r) – Bt (x1r – y1r) = – Bt x1r
(Pt + 2 Bt + Br) (1 – y0r) – (Bt + Br) (y1r) + Bt y1r= 0 (Pr + Br) (1 – y0r) – ( 2 Bt + Br) (y1r) = 0
( 2 Bt + Br) (y1r) = (Pr + Br) (1 – y0r)
( 2 Bt + Br) (y1r) / (Pr + Br) = (1 – y0r)
(Pt + 2 Bt + Br) (1 – y0r) – (Bt + Br) (y1r) + Bt y1r = 0
(Bt + Br) (y1r) - Bt y1r = (Pr + Br) (1 – y0r)
y1r Br / (Pr + Br) = 1 – y0r
y0r = 1 - y1r Br / (Pr + Br)
αt = Bt + (Bt + Pt)
αr = Br + (Br + Pr)
x1t = 2 y1t
x1r = 2 y1r
x1t = y0t (1 – αt)
x1r = x1*t (1 – αr)
y0t =1 – y0r αt – y1t αt – (1 - y0r)
y0r = 1 - y1r αr
Calcul de l’exemple de la partie 3
Rappel : αt = Bt + (Bt + Pt) et αr = Br + (Br + Pr)
(1 – x1t* (1 – 0.6) / 2 * 0.6) (1 + 2) / (1 + 1) - 1 / (1 + 1) - (x1t* / 2) * 1 / (1+ 1) = x1t* / 0.5
(1 – x1t* (1 – 0.6) / 2 * 0.6) (3) / (2) - 0.5 - (x1t* / 2) * 0.5 = 2 x1t*
X1*t = 100 / 243
100 / 243= 2 y1t >> y1t = 50 / 243
x1*r = 2 y1r >> y1r = 20 / 243
100 / 243= y0t (1 – αt) >> y0t = 200 / 243
x1r = 100 / 243 (1 – αr) >> x1r = 40 / 243
y0t =1 – (1- y0r) αt – y1t αt – (1 - y0r)
y0r = 1 - y1r αr >> y0r = 77 / 81
On a donc :
y1t = 50 / 243
Y1r = 20 / 243
Y0t = 200 / 243
Y0r = 77 / 81
X1t = 100 / 243
X1r = 40 / 243