Logic Masters Deutschland e.V.

Rules:
1.Normal sudoku rules apply.

2.Digits in outlined cages sum to the number in the top left corner. Digits may not repeat in a cage.

3.Cells marked with circles must contain odd digits. Cells marked with squares must contain even digits.

4.Odd and even digits may not form a 'CHECKERBOARD' pattern in any 2x2 square of cells anywhere in the grid.

5.Inequality signs point to the smaller digit.

Testers have said that this one is around 3-4 difficulty. So have gone with 3 star difficulty.

Penpa

F-Puzzle