Is it possible to define a scoring strategy formula that depends on the answer to another question? (Support #705)

You have to install the version 1.4 (not sure the command is defined with 1.3) then use setglobal.xxx, see documentation "Scoring strategy".
For me, it's pretty hard but i'll attempt an minimal working example if i have time.

Thank you!

a first exemple to be improve.

\documentclass[a4paper]{article}

\usepackage[utf8x]{inputenc}    
\usepackage[T1]{fontenc}

\usepackage[francais,bloc,completemulti]{automultiplechoice}    
\usepackage{mhchem}
\begin{document}

\onecopy{10}{    

%%% debut de l'en-tête des copies :    

\noindent{\bf QCM  \hfill TEST}

\vspace*{.5cm}
\begin{minipage}{.4\linewidth}
\centering\large\bf Test\\ Examen du 01/01/2008\end{minipage}
\champnom{\fbox{    
                \begin{minipage}{.5\linewidth}
                  Nom et prénom :

                  \vspace*{.5cm}\dotfill
                  \vspace*{1mm}
                \end{minipage}
         }}

\vspace{1ex}

%%% fin de l'en-tête

\begin{questionmult}{ion}\AMCnoCompleteMulti\bareme{MAX=0,b=0,m=0}
Sélectionnez un ion

  \begin{reponses}[o]
    \mauvaise{\ce{Cu^{2+}}}\bareme{setglobal.ion=2}
    \mauvaise{\ce{C$\ell$-}}\bareme{setglobal.ion=1}
  \end{reponses}
\end{questionmult}

\begin{questionmult}{ion-electron}\AMCnoCompleteMulti
Combien d'électrons a-t-il gagné ou perdu ?
\bareme{formula=(ion == 2 && gain == 2  || ion == 1 && gain == 1 ? 1 :0),MAX=1}

  \begin{reponses}[o]
    \bonne{+ 2}
    \bonne{- 2}\bareme{set.gain=2}
    \bonne{- 1}
    \bonne{+ 1}\bareme{set.gain=1}
  \end{reponses}
\end{questionmult}

% \AMCaddpagesto{3} 

}   

\end{document}

Thank you again!