Logic Masters Deutschland e.V.

Rules:
Normal sudoku and Thermo rules apply:
Place the digits 1-6 once each in every row, column, and box.
Digits along a thermometer must strictly increase from the bulb to the tip.

Make a 1-cell-wide loop of orthogonally connected cells, which does not branch or touch itself – not even diagonally.
The loop acts as a Ten Line: it can be divided entirely into contiguous, non-overlapping segments, each consisting of cells that sum to 10. (A segment may contain repeated digits.)

Each thermo bulb is on the loop.
The digit in a bulb indicates how many loop cells it can see horizontally or vertically combined, including itself. Non-loop cells block the vision.

• Tenacious Ten Loop (9x9 Arrow)
• Teeny Ten Loop (6x6 Arrow)
• Heat Intensity (9x9 Thermo)