Logic Masters Deutschland e.V.

This sudoku comes in two versions:
❶ a normal one (which includes the digit 1 in the lower left box)
❷ a hard(er) one (without the 1 in that box)
Please consider the normal version for the difficulty rating.

Play online: f-puzzles | CtC app

Rules

Place numbers in the grid such that every row, column, box and shaded area contain the numbers 1 to 10.

Hints

1. you can more or less solve the puzzle in succeeding order if digits.
2. don't miss the hidden pair in box 8.
3. In the middle there are several ways forward. The intended path is a bit tricky. At some stage in box one 2,3,4 and 5 are located in r1c1,2,3 and r2c1. All other cells in box 1 are all seeing r3c4. That means that r3c4 can only be from 2,3,4 and 5. Hence it is a 5.
4. c4 and then r7 both resolve by asking where the 8 goes.