Irregular/region sudoku rules apply. The are 4 6x6 grids (separated by the cages) that each use the digits 1-6 each. Japanese sums rules apply. Colors used in this puzzle are Red, White (green clues), Blue, and Pink. Red and white clues appear on the top and left side of the grid, while blue and pink appear on the right and bottom. There are no unshaded cells. The clues outside the grid indicate the sums of the contiguous runs found in that row or column that must be shaded the color of the clue (green clues represent white!). If a clue is black, then both colors must be present in the row or column. There must be a different color between runs of the same color. If a row or column is unclued, those colors do not appear in that row or column. Clues read left to right (or top to bottom) in both cases.