Applying article 4 to illegal moves (valid in 2018)
In a classical game (standard time control), Black just played Kh7 and pressed his clock. White stops the clock, claims an illegal move and insists that Black must move his King. What does the arbiter do? This is the first illegal move by Black.
In a classical game (standard time control), White plays 1. e:f6+ leaving his King in check and presses his clock. He performed the capture by grabbing the black Bishop and then pushing the pawn to f6. Black summons the arbiter and claims the (first) illegal move. What move does the arbiter tell White to play now?