First, thank you to everyone for your answers.
Secondly, congrats to RemBeau for his french ! Just a precision : in France we speak
of the " greens ", keeping the english word :
RemBeau:
les verts sont large, style st Andrews pour t'habituer sur les distance pour le putting. :)
And thak you for your advice, I'll train with the Ping, the more so as I usually play St Andrews, which is not easy !