Logic Masters Deutschland e.V.

Blackout Domino

(Published on 30. September 2011, 12:00 by Richard)

Paint some cells black and place all given domino pieces in the grid so that they don't overlap each other. Two orthogonal neighbouring cells from different domino pieces must be equal.

Black cells may not touch the border orthogonally and they may not touch each other orthogonally.

Solve online in Penpa+ (thx Nick Smirnov!)

Solution code: Row 4, followed by row 5. 'S' for a black cell.

Last changed on on 9. October 2022, 08:23

Solved by pin7guin, ibag, zuzanina, pokerke, saskia-daniela, dm_litv, uvo, MiR, PRW, joyal, Rollie, Mody, derwolf23, rimodech, Saskia, Thomster, AnnaTh, Luigi, Katrin K, Alex, Statistica, Hansjo, ManuH, ... gallisel, Matt, Nothere, Uhu, marcmees, amitsowani, Joe Average, Puzzle_Maestro, misko, EKBM, Dux, Realshaggy, VolkerNö, Maxst0f, chrisbee2, polar, Nick Smirnov, Mark Sweep, helle, Krokant
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Comments

on 5. December 2022, 17:23 by Mark Sweep
Very good puzzle!

on 9. October 2022, 08:23 by Richard
Added link and tag for online solving. Thx Nick!

on 25. September 2022, 00:26 by Nick Smirnov
Penpa:
https://tinyurl.com/2gsveu9e

Last changed on 22. September 2022, 12:44

on 22. September 2022, 08:44 by Nick Smirnov
@Richard, could you, please, explain this part of the rules: ''Two orthogonal neighbouring cells from different domino pieces must be equal.'' Can two dominos form a square such that one half of neighbouring cells are equal but the other one is not?
----
Reply: No, two dominos can't form a square in this puzzle. All domino halves touching each other must contain equal digits. In the final grid, all domino's have to be placed like in a regular domino game, with the remaining 'holes' filled with black cells.
Here you can find a small example (puzzle 20)
https://logicmastersindia.com/lmitests/dl.asp?attachmentid=360&view=1
---
Great, thank you. That will make it easier to solve.

on 1. July 2020, 17:14 by Puzzle_Maestro
Great puzzle! There was a lot of novel logic, at least for me. This type definitely has more potential than I first assumed.

on 3. July 2012, 20:19 by CHalb
Richard, this one is very interesting and quite hard. It took me some time to take the first few notes. After a while I made an assumption in one cell and then - after guessing one number of the solution code ;-) - it took me some more time to finish it. Im going to try if this experience helps me in some other of your Dominos.

on 30. September 2011, 15:12 by ibag
Very nice puzzle, though! Thank you!

on 30. September 2011, 14:50 by Richard
Because I used the wrong image of this puzzle, it had two solutions. With the new image, it must have a unique solution. I sincerely hope!

on 30. September 2011, 14:29 by pin7guin
Yippieh, Erste! ;-)

Difficulty:3
Rating:91 %
Solved:78 times
Observed:6 times
ID:00015N

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