Logic Masters Deutschland e.V.

First attempt at making a sudoku using my favourite variant (region sum lines), hope you find this sudoku fun as well!

Normal sudoku rules apply.

Region sum lines: Along a blue line digits sum to equal totals in each box. Digits on a line in each row or column may not repeat even at the outside grid.

Numbered Rooms: Number outside the grid indicate the digit which has to be placed in the Nth cell in the corresponding direction, where N is the digit placed in the first cell in that direction.

CTC Link (No solution check)

Fpuzzle Link (No solution check)

Penpa Link (Use blue/green/red digit for solution check)

Puzzle:

Note that you just have to fill the digits in the 9x9 grid to solve the puzzle, ignoring the outside grid.