Indicated cells form a single region that may be traversed by making a chess knight's move to another cell in the region containing a digit either one higher than or one lower than (but not the same as) the digit in the cell being moved from.
A hop box is a special case of this, where the region is every cell inside a box except the central one, which contains a 9.
Rules:
Indicated cells form a single region that may be traversed by making a chess knight's move to another cell in the region containing a digit either one higher than or one lower than (but not the same as) the digit in the cell being moved from.
A hop box is a special case of this, where the region is every cell inside a box except the central one, which contains a 9.
Example Puzzle:
https://kitiara.has.coffee/MagicYoungHopboxFP