Place the digits 0-9 once into each row, column, and region. Identical digits may not be separated by a knight's move. The digits 0 and 9 may not be orthogonally or diagonally adjacent to each other or themselves.
A clue outside the grid is either an X-Sums clue or a Sandwich clue, but not both. I.e. exactly one of the following is true:
Online solver: SudokuPad
Solution code: Column 6 (ten digits, no spaces)
on 25. June 2024, 19:58 by Silverstep
It's a "fair" antiknight coloring, insofar as antiknight colorings can be considered fair. I do not make the same claim about the antiknight starbattle, that stuff was vicious.
on 26. January 2024, 17:03 by marcmees
hard to unravel this very tight knot.
on 25. January 2024, 11:06 by Fool on Hill
This is an amazing puzzle using pretty much every trick in the book - I thoroughly enjoyed working it out.