Basic Tapa rules apply:
Empty cells can be filled to form a connected black region.
No 2x2 area can be entirely filled with black cells.
Clue cells with numbers cannot be filled in and represent the length of each consecutive black cell block in the eight surrounding cells.
If a clue cell has multiple digits, the groups of black cells must be separated by at least one white cell.
Question marks (?) can be used instead of clue numbers and represent any non-zero integer.
Additional No Squares Tapa rule:
the amount of white cells (except clue cells) must be equal to the amount of black cells.
Additional No Squares Tapa rule:
the amount of white cells (except clue cells) must be equal to the amount of black cells.