This is my solution:

My approach was fairly simple:
1. Note down the possible digits for each cell, according to the rules.
2. Solve it like a usual Sudoku.

Here are the basic steps:

Put all the possible digits in the outlined areas according to the question:

Digits that appear multiple times inside one area and therefore have to must exist at a specific position:

Following the general Sudoku rules (specificly: unique digits in column, row and subgrids):

Some more deduction using the general Sudoku rules:

Continue to solve the Sudoku.

This is my solution:

My approach was fairly simple:
1. Note down the possible digits for each cell, according to the rules.
2. Solve it like a usual Sudoku.

Here are the basic steps:

Put all the possible digits in the outlined areas according to the question:

Digits that appear multiple times inside one area and therefore must exist at a specific position:

Following the general Sudoku rules (specificly: unique digits in column, row and subgrids):

Some more deduction using the general Sudoku rules:

Continue to solve the Sudoku.

This is my solution:

My approach was fairly simple:
1. Note down the possible digits for each cell, according to the rules.
2. Solve it like a usual Sudoku.

This is my solution:

My approach was fairly simple:
1. Note down the possible digits for each cell, according to the rules.
2. Solve it like a usual Sudoku.

Here are the basic steps:

Put all the possible digits in the outlined areas according to the question:

Digits that appear multiple times inside one area and therefore have to must exist at a specific position:

Following the general Sudoku rules (specificly: unique digits in column, row and subgrids):

Some more deduction using the general Sudoku rules:

Continue to solve the Sudoku.