No Hiking Allowed
(Published today, 00:22 by Vythic)
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Normal sudoku rules apply.
Summit Lines: Digits along a pale blue line must be ascending or descending, with 1 and 9 reversing the ascension/descension. (eg if digits along a pale blue line are 2-5-6-9-8-5, the sequence is ascending until the 9 causes a descension).
Descension Arrows: Digits along an arrow sum to the digit in the circled cell, and they must descend away from the circle (digits cannot repeat).
XV: Digits separated by an X sum to 10, and V to 5.

Solution code: Row 1
Last changed on today, 00:22
Solved by vollbesonderbar, jalebc, Piff