Locate in the <BD>Info</BD> window the player pointed by the arrow indicator. That player is the one currently expected to move.

Click once inside the <IT>Strategram</IT>  window in order to activate it. Then click on the <BD>pawn</BD> at <BD>g6</BD>; keeping the mouse pressed on this pawn drag it over to <BD>g5</BD> and release the mouse.