Logic Masters Deutschland e.V.

This puzzle did not need a remix, but I was curious how the rules would work in a regular 9x9—turns out quite well! Difficulty estimated at 3.25 stars.

Rules:

Trail Sudoku: Place the digits 1 to 7 and two trees per row, column, and 3x3 box. Trees occupy cells just like digits but have no value.

Three Trails

• Draw three 1-cell wide, orthogonally-connected trails in the grid that do not touch themselves orthogonally (but may diagonally). The trails may touch each other, but they do not overlap, cross, or share cells
• The trailheads (ends) of each trail are given as a matching set of shapes (the two circles are the ends of one trail, for example)
• The trails cannot pass through cells with trees

Arrow Clues

• Cells with arrows must be on a trail
• Digits in cells with arrows give the distance (in number of cells) to the nearest tree in that direction. The distance includes the cell with the arrow

Example: Here is an irregular 5x5 example puzzle (Penpa, SudokuPad) that has two trails, and uses the digits 1 to 4 and one tree per row, column, and region.

Solve online:

• Penpa+ (with trees! Answer check on blue Sudoku)
• SudokuPad