Windmill

Title: Windmill

Rating: 3/5

As happened in a previous puzzle, this sum puzzle contains regions that overlap each other (instead of just abutting each other).  May your pursuits to solve this one not be quixotic.

The official rules:

• The digits 1 through 9 appear in each row and each column exactly once.
• Digits in each shaded region must add to the indicated sum.   
• Squares with multiple colors contain a number that’s used in the sum for adjacent regions of each of those colors.
• Cells at the following positions belong to the regions that go horizontally and vertically through that cell: (2,2), (2,8), (8,2), (8,8).  The (light purple) color of these cells is the RGB-average of the colors from the horizontal and vertical regions that intersect there. 
• Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.