THE DANCE OF HORSES(A DIFFICULT QUIZ)

TWO WHITE AND TWO BLACK HORSES HAVE BEEN PUT IN THE CORNERS OF A CHESS BOARD WITH 9 SQUARES(3X3).(THE TWO WHITE ARE IN THE FIRST LINE AND THE TWO BLACK ARE IN THE THIRD LINE).

TRY TO EXCHANGE THE POSITIONS OF THE WHITE AND THE BLACK HORSES WITH THE LESS MOVES.(THE TWO WHITE IN THE THIRD LINE AND THE TWO BLACK IN THE FIRST LINE).