Fan

Title: Fan

Rating: 2/5

If the puzzle gets too frustrating (and it shouldn't), you could always poke a hole in the center and have it swirl around for a breath of fresh air.

The official rules:

• The digits 1 through 9 appear in each row and each column exactly once.
• Digits in each shaded region must multiply to the indicated product.   
• Squares with multiple colors contain a number that’s used in the product for adjacent regions of each of those colors.  
• Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.