 Early critics of the "Analyse du jeu des Échecs" include those of the Modenese School (Ercole del Rio, Lolli or Ponziani), who in contrast to the French, advocated a free piece play, gambit openings and tactical complications; they also found some of the variations reported in the "Analyse" to be unsound (in particular those related with ...f7–f5 push in the Philidor Defence