Logic Masters Deutschland e.V.

This is my attempt at making puzzle with the new Isofill constraint introduced by Marty Sears. Below you can find a list of other puzzles made with this constraint. Have fun solving!

The puzzle :

Play on Penpa.

Play on sudokupad.

Rules :

- Isofill : divide the grid into 10 regions, each comprised of 10 orthogonally connected cells. Every cell in a region contains the same digit. All of the digits 0-9 appear in the grid.

- Quad sums : the number in each circle is the sum of the digits in the 4 cells touched by the circle. Each "?" represents a digit from 1-9.