Logic Masters Deutschland e.V.

Sudoku: Normal Sudoku rules apply; place the digits 1-9 once in every row, column, and 3x3 box.

Index Lines: The digit in the Nth cell along a line (starting from the diamond) indicates the position where the digit N appears. For example, if a diamond cell has a 4, the fourth cell along that line must have a 1.

Numbered Rooms: All clues outside the grid must contain a digit. That digit must appear in the Nth position looking into the grid of its row or column, where N is the digit in the first position.

Expected Difficulty: 2.5 stars

Happy Birthday ChinStrap! I had an idea for this puzzle and set the first version pretty quickly. Then, while writing the rules (AKA looking through ChinStrap's puzzles to steal rule wording) realized that he had already set Directory Listing nearly two years ago, a puzzle using the exact same ruleset. So if you enjoy this puzzle, I highly recommend you try that one next!

---