Logic Masters Deutschland e.V.

The 2026 Tour de France is underway, and this puzzle is ready to join the peloton.
Grab your helmet, settle into the saddle, and enjoy the ride!

Special thanks to Flinty for test-solving and helping refine the puzzle’s aesthetics.

To solve online, click here or on the image below.

Rules

Normal sudoku rules: Place the digits 1 to 9 in each Row, Column, and 3X3 box.

Path: Draw a one-cell-wide path through the centers of cells, starting at the rider (R1C9) and ending at the medal (R3C5). The path moves orthogonally between cells. It may not branch or visit any cell more than once.

Entropy Path: Every set of three consecutive digits along the path must contain a low (1,2,3), a medium (4,5,6), and a high digit (7,8,9).

Mountain Stages: Each mountain cell lies on the path. The path must travel straight vertically through each mountain cell. If the digit in a mountain cell is N, then that mountain is part of a vertical straight section of length N. The sums of the digits above and below the mountain within that section must differ by N.

Flat Stages: Each flat road cell lies on the path. The path must travel straight horizontally through each flat road cell. If the digit in a flat road cell is N, then that road is part of a horizontal straight section of length N. The sums of the digits to the left and right of the road within that section must differ by N.

Chequered Flags: Each chequered flag lies on the path. The path must turn at each flag, with one straight horizontal stage and one straight vertical stage meeting at the flag. If the digit in a flag cell is N, then both stages have length N, including the flag cell itself. The sums of the non-flag digits in the two stages must differ by N.

Soigneurs: Soigneur (standing man) cells are not on the path. A digit in a Soigneur cell indicates the number of path cells in the (up to) 8 surrounding cells.