Amends

Title: Amends

Rating: 1/5

If the first of these was challenging, this second of the four "pentoku" puzzles I created should engender some good will.  It's one of the easiest puzzles I've created.

The official rules:

• The digits 1, 2, 3, 4, and 5 appear in the above puzzle.
• Each shaded region contains exactly one of each of the digits 1 through 5.
• No row or column can contain more than two appearances of any of the digits 1, 2, 3, 4, 5.
• Squares with multiple colors contain a number that’s used in both of the associated adjacent regions.

Tom Collins

Title: Tom Collins

Rating: 3/5

A classic drink headlines this week's mix puzzle.  Typical ingredients are gin, lemon juice, and sugar syrup, with a maraschino cherry as garnish.

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 (denoted by +) or multiply to the indicated product (denoted by *).   
• Squares with multiple colors contain a number that’s used in the sum/product for adjacent regions of each of those colors.  
• Remember: numbers can repeat within a shaded region if that repetition doesn't violate the first rule.

Central Office

Title: Central Office

Rating: 2/5

This week's product puzzle was modeled to more clearly exhibit the symmetry of construction.  Each of these puzzles has not just 180 degree symmetry, but a 90 degree symmetry, with colors consistently shifting as the puzzle rotates.

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. 

UFO

Title: UFO

Rating: 3/5

Don't be tempted to look at the sky.  Keep your eyes on the puzzle.

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.