Yin-yang Anti-Knight
(Published on 30. April 2020, 21:59 by Tom1i)
Instructions
- Normal sudoku rules apply.
- Anti-Knight: no two squares with the same value may be a knight's move apart (horse or knight from chess).
- Numbers outside the grid is either: a) the sum of all even numbers in the white squares OR b) the sum of all odd numbers in the black squares. They are represented graphically as little killer clues and sandwich clues in the link.
- White squares with green highlighting must contain all of 1-9. Black squares with blue highlighting must contain all of 1-9. These 2 regions are key to solving the puzzle. They are represented graphically in the link as two palindromes (gray lines).
Link to puzzle in f-puzzles: PUZZLE
NOTE: There should be a very limited need for trial and error. There is a logical path through the puzzle - it may be tricky to find though. White squares with green highlighting count as white when considering clues. Black squares with blue highlighting count as black when considering clues. Yellow squares are not counted in clues.
Puzzle
Printer friendly:
Solution code: Row 1
Last changed on on 4. November 2020, 18:08
Solved by Imperial Marcher, zhergan, Julianl, cdwg2000, marcmees, Ours brun, NikolaZ, zorant, skywalker, Richard, polar, abed hawila, tinounou
Comments
on 23. July 2021, 17:55 by abed hawila
What a puzzle! challenging and enjoyable! thank you!
on 4. November 2020, 18:10 by Tom1i
Added an f-puzzles link.
on 1. May 2020, 20:58 by marcmees
very cleverly constructed. thanks. enjoyed it a lot.
on 1. May 2020, 10:00 by zhergan
Thanks for this nice and enjoyable variant..
on 1. May 2020, 07:35 by Imperial Marcher
Interesting variant! Thoroughly enjoyed :)
on 1. May 2020, 00:12 by Tom1i
Made printer friendly version.
