Masyu #69
Draw a single closed line in the grid that does not pass through any cell more than once, but does not necessarily run through all cells. The individual segments of the line run horizontally or vertically between the centers of orthogonally adjacent cells.
The line path must run through all cells with white or black circles. In a cell with a black circle, the line must turn at right angles, but not in the cells immediately before or after it. In a cell with a white circle, the line must not turn, but it must turn at right angles in at least one of the two cells immediately before or after it.