Modèle de test Gaston Lagaffe 2 1629830000 1.0 Ref 0 13 1 2 Moves a dimer to east. A dimer is identified The east location next this dimer is empty In this very simple model, I do not need to check this condition Therefore I can (and I want to) move it to its next east location The identified dimer no more exists ( :-(( Happily, it is now rebuilt at its east location ( ;-))