Logic Masters Deutschland e.V.

Black and White

(Eingestellt am 12. Februar 2021, 23:34 Uhr von zetamath)

Normal sudoku rules apply.

To complete the puzzle, you must shade some squares. Your shading must satisfy all of the following:

1) All shaded squares are orthogonally connected

2) No 2x2 region is entirely shaded or entirely unshaded

3) No group of unshaded cells is enclosed by shaded cells.  

4) The numbers on the rows and columns indicate the sum of the shaded cells in that row or column.

5) All circled cells are shaded.

6) The digit in a circle matches the number of shaded cells within that box (counting itself).

To clarify, below is a completed grid (for a hypothetical puzzle) that satisfies all of the above rules:

The below grid includes many examples of things that are not allowed.

The things that are wrong are:

In box 1, the circled digit is a 4, but the there are 6 shaded cells.

In box 2, the circled digit is not shaded.

In row 2, the shaded digits do not sum to 18.

In box 4, there is a 2x2 square that is all shaded. Similarly in box 5 there is a 2x2 square that is all unshaded.

In box 6, there is an unshaded region entirely surrounded by shaded cells.

That's all, have fun, leave a comment if you enjoy the puzzle!

Play this puzzle online

Lösungscode: Row 6 followed by Column 9

Gelöst von Greg, SirWoezel, Thomster, PixelPlucker, Sktx, polar, EliasKar, stefliew, bigger, kublai, portmanjeau, MagnusJosefsson, StefanSch, tinounou, Quarterthru, Realshaggy, NikolaZ, MalkoMann2, ... Mino, harrison, bernhard, Klausku, Lenne, Jesper, sudocolor, thinkingalaud, Ampersand, Jaych, cfop, Nylimb, neliss94, panthchesh, Mody, ibag, Uhu, Vebby, michaal94, BARTE, Phistomefel
Komplette Liste


am 14. Mai 2021, 16:16 Uhr von BARTE
Great ruleset, great puzzle! Thank you very much for setting such an enjoyable puzzle :)

am 2. Mai 2021, 15:03 Uhr von Mody
Das hat mir sehr gut gefallen, angenehmer Schwierigkeitsgrad und schön logisch lösbar.

am 16. Februar 2021, 11:42 Uhr von StefanSch
Eine phantastische Rätselkombination. Die verschiedenen Elemente greifen bis zum Schuss harmonisch ineinander. Da würde ich gerne 6 Sterne vergeben.

A phantastic puzzle combination. The different parts works harmonically together till the end.
I would like to give you 6 Stars.

That's my puzzle of the month.

am 13. Februar 2021, 23:02 Uhr von EliasKar
I'm not so good at shading puzzles, so that part gave me some trouble, but once I got the hang of it, it was very enjoyable. Amazing puzzle!

am 13. Februar 2021, 18:12 Uhr von PixelPlucker
Very fun solve! The shading component was pleasant and the solution path was incredibly smooth.

am 13. Februar 2021, 02:18 Uhr von Greg
Very nice, good combination of rulesets.

Bewertung:99 %
Gelöst:46 mal
Beobachtet:1 mal


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