Rorschach II

Title: Rorschach II

Rating: 5/5

One of the hardest puzzles I've ever created, and a sequel to the infamous original, and the final sum puzzle I've created.  Note also the overlapping regions for an extra challenge (see the final rule).  Enjoy (?).

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.
• Cells at the following (row, column) positions belong to the regions that go horizontally and vertically through that cell: (2,3), (2,7),(3,2),(3,8),(7,2),(7,8),(8,3),(8,7). 

Rorschach

Title: Rorschach

Rating: 5/5

One of the hardest puzzles I created, but I promise it's solvable.  Make it your resolution to complete it.

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. 

Petri Dish

Title: Petri Dish

Rating: 5/5

This is one of the hardest puzzles I've created, and it's essential that you use the last rule from the list below, an addition from other sum puzzles.

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.
• Each number that appears in the five starting cells is the average of the entries in the edge-adjacent four cells (e.g., the 7 in row 5, column 5 (denoted (5,5)) is the average of the entries in cells (4,5), (6,5), (5,4), and (5,6)).