Logic Masters Deutschland e.V.

Rules:

Normal Sudoku rules apply. Place the digits 1-9 once each into every row, column, and box.

There is a river that travels orthogonally through the grid from the top right corner to the bottom left corner. The river cannot touch itself orthogonally or diagonally. The river acts as a region sum line. Digits along the river within each box sum to the same number. If the river enters a box more than once, each segment is summed separately.

There is a walking path that travels orthogonally through the grid from the top left corner to the bottom right corner. The walking path cannot touch itself orthogonally or diagonally. The walking path acts as an entropic line. Every set of three sequential cells along the walking path must contain a low digit (1-3), middle digit (4-6), and high digit (7-9).

Digits may repeat along both lines.

There is a bridge (diamond) that is part of both the river and the walking path, and is the only cell that is part of both.

With the exception of the bridge, at no point can the river and walking path be orthogonally adjacent, but they may touch diagonally.

There are two boulders (squares) that must be orthogonally adjacent on at least three sides by the river. The digit on a boulder is consecutive with one of those orthogonally adjacent digits along the river.

There are two trees (circles) that must be orthogonally adjacent to both the river and the walking path. The digit on a tree is less than all orthogonally adjacent digits on the walking path and greater than all orthogonally adjacent digits on the river.

CtC link

Have fun solving!