Hook

Title: Hook

Rating: 3/5

Time may be following you (inside a crocodile), but the extra rule at the end of the list should help you succeed.

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.
• Remember: numbers can repeat within a shaded region if that doesn't violate the first rule. 
• The digits 1 through 9 appear in each 3X3 grid exactly once.