Black cannot escape check, as he could in normal chess, with Ke7 or Kf7, as these moves do not cross a grid-line, but he can play Kd7 and also Kd8, bringing the king into the same large square as the rook.
Black cannot escape check, as he could in normal chess, with Ke7 or Kf7. These moves do not cross a grid-line. He can play Kd7. He can play also Kd8. He is bringing the king into the same large square as the rook.