Tapa rules

Blacken some cells so that all the black cells are linked orthogonally. A digit in a cell indicates the number of adjacent black cells among the neighboring cells orthogonally and diagonally of the one which contains the digit. If there is more than one digit in a cell, the black cell blocks must be separated by at least one white cell. Cells containing digits cannot be blackened. Moreover, blackened cells can never form a 2x2 square.