In the example diagram, either side having the shift is in zugzwang: Black to maneuver have to play 1...Kb7 allowing for White to advertise the pawn after two.Kd7; White to maneuver need to permit a attract, either by one.Kc6 stalemate or by losing the pawn after another legal shift.If you've been provided a beta-tests code by CardGames.io be sure