Normals udoku rules apply. Yin Yang: The grid is divided into exactly two regions of orthogonally connected cells. No 2x2 square of cells is entirely in either region. +/-1 lines: adjacent cells along a line share differ by 1 and share their yin Yang region. ALL possible lines are given. Counting circles: There are 12 circles in the grid. A digit in a circle indicates how many circles contain that digit and a digit in a circle in a yin Yang region indicates how many cells in that yin Yang region contain the digit. ALL possible circles are given. Dynamic fog. One cell is covered with fog. Correctly placing a digit in a particular cell will clear the fog.
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