Tetro Chain K
Place connected tetrominoes and satisfy the black, white and gray circle clues.
Controls
Place tetrominoes of four orthogonally connected cells. Tetrominoes may not touch orthogonally; two that touch at a corner must have different shapes. All tetrominoes must form one diagonally connected chain. A black circle means its eight neighbours contain more shaded than white cells; white means fewer shaded cells; gray means the counts are equal. Tap cells to shade or clear them, use Clear and the answer button.
Brain training · PuzGo