Erica 20 (Antiknight Fog Edition)
(Eingestellt am 30. November 2025, 17:15 Uhr von SennyK)
Today's Erica has a lot in common with chess knight :-)
I hope you will enjoy and I would be really grateful for all the comments and ratings.
Normal sudoku rules apply.
Fog: The grid is partially covered in fog. Entering correct digit will clear fog from its cell and all cells knight's move away (in chess). No guessing is required.
Antiknight: Cells seperated by a knight’s move (in chess) cannot have the same digit.
German whisper: Neighbouring/adjacent digits along a green line have a difference of at least 5.
X/V: Digits in cells joined by an X sum to 10. Digits in cells joined by a V sum to 5. Not all Xs and Vs are given.
Antiknight Explanation:
You can imagine that digit 1 is a chess knight. Each cell accessible to it via a knight's move (in chess) cannot contain another 1.
If you liked this puzzle, I recommend trying out my other puzzles: The Erica Series:★☆☆☆☆: 1, 2, 4, 5, 6, 12, 15, 17, 23, 26, 27
★★☆☆☆: 3, 7, 8, 10, 11, 13, 14, 16, 18, 20, 24, 25
★★★☆☆: 9, 19, 21, 22 Shading/Ying-Yang:
★★☆☆☆: Pretty Odd Shaded Area
★★★☆☆: (+5)-Yang, Negative 8 YY
★★★★★: Why-Why? Fog of War:
★☆☆☆☆: Erica 12, Erica 17
★★☆☆☆: It's What You Do in the Dark That Puts You in the Light, Find It All, What the Fog?, Erica 20
★★★☆☆: Broken Flashlight in the Dark Pencil Puzzle/Sudoku Hybrid:
★★☆☆☆: Masyu (Short) Sudoku
★★★☆☆: Tetromino Sudoku
Various Puzzles:
★☆☆☆☆: Blown Fuses in Electrical Installation, Let Me Introduce Myself, French Wrench
★★☆☆☆: Symmetrical Fan, Night Club, Important Hour on the Clock, What Was the Sum Again?, Disgroup Joints, 10-Arrows, Antiking Dutch Skyscrapers
★★★☆☆: Cops & Robbers, Positive Symmetry, Doppelgänger Killer 1-25
★★★★☆: Liars. Liars Everywhere.
Lösungscode: Third (3rd) column of the grid from top to bottom.
Kommentare
am 16. Dezember 2025, 22:02 Uhr von Myfyr MJ
Very nice, thank you.
am 2. Dezember 2025, 22:13 Uhr von 3ffer
Loved it, but 2* at the most.
am 1. Dezember 2025, 02:03 Uhr von VitP
a couple people in the comments seem to be unfamiliar with how pair colouring works.
There will be a number of cells where you have a PAIR of candidates, eg. {23}. label one of them red, say, and the other green (good contrast). propagate that colouring around the grid. you will find a cell with candidates {123} that "sees" both red and green, and therefore must be 1. later, do the same thing with the {79} pair.
am 30. November 2025, 23:40 Uhr von galium_odoratum
2.5* for me as well. Fun puzzle with a challenging endgame.
am 30. November 2025, 22:19 Uhr von Martina
Nice! 2.5* or 3* for me.
am 30. November 2025, 21:19 Uhr von VitP
pair colouring, which is not quite a basic technique (but it COULD be) features strongly in this puzzle
am 30. November 2025, 21:00 Uhr von s1mn
Love it!
am 30. November 2025, 20:27 Uhr von wuc
Great fun steps almost till the end. Some harder viewing ideas in the end makes it rather 2.5* to me. Great setting thx.
am 30. November 2025, 19:24 Uhr von hardline35
very enjoyable fog puzzle. thank you!
