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No More Promises Samurai Sudoku

As promised, my next post, sometime in 2014.

Thanks!

FYI, it's not easy, but that's mostly because of the needle-in-a-haystack variety of finding clues.  I promise that there's nothing as difficult as an x-wing in there.

Also, please let me know in the comments if you find this.  I'm curious who is still out there.





Shameless Ripoff Number Billion

motris posted his team logo for the WPC.  It was a Star Battle (spoiler?) with three of the areas in the shapes of a U, an S and an A.  So, because I never have any of my own ideas, I ripped it off:

Small Region Star Battle:  Mark some cells with stars such that each outlined region contains exactly ONE star and each row and column contains exactly TWO stars.  Stars may not touch each other, not even diagonally.

fig_starbattle_01

Stay tuned for my next post, sometime in 2014.

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First Tapa

In honour of the upcoming Tapa Variations Contest, here are a couple Tapa puzzles.  The first is not my best work, but the second is kind of cool!  (All instructions stolen from the list of Tapa Variations by Serkan Yurekli, which can be found on the link above.  If anyone has a problem (or even thinks that someone might have a problem) with me copying someone else's instructions, please let me know.)

Tapa: Paint some cells black to create a continuous wall.  Number(s) in a cell indicate the length of black cell blocks on its neighboring cells.  If there is more than one number in a cell, there must be at least one white cell between the black cell blocks.  Painted cells cannot form a 2x2 square or larger.  There are no wall segments on cells containing numbers.



Battle Tapa:  Follow regular Tapa rules.  Additionally, all empty cells (without clue cells) should form the given battleships set.  None of the ships may touch, even diagonally.  (The non-touching ships rule is not specified in the TVC rules, but I'm sure that's the intention.  If not, the sample puzzle has multiple solutions.)

Note that there is one one-unit ship missing from the regular battleships set.  Also note that my drawings tend to not look great.






Magic Cube Masyu

This is a Masyu puzzle, on a cube grid.  It's based on the recent test on Logic Masters India, although this puzzle type was missing.

Normal Masyu instructions are the following.  Nothing is different, just watch that your lines are straight.

Find a single closed loop passing through each of the black and white circles. The path passes through the centers of adjacent squares. When passing through a black circle, the path must make a 90 degree turn and extend at least two squares in both directions. When passing through a white circle, the path must go straight and must make a 90 degree turn in at least one of the adjacent squares.
 
 





This Nurikabe goes to 11

Nurikabe: Colour several squares black such that each number in the grid belongs to a white island containing that number of squares. The islands cannot be orthogonally adjacent. The black cells represent the ocean, and must be one contiguous set. Also, no 2x2 square can be all black.



I've been sitting on this one for a while, because I'm not overly happy with it. I tried to force the solver to create each island in order, using the same logic over and over again. However, I wussed out with the 8, 9 and 10, and then just gave up completely with the 11.

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Odd/Even Nonconsecutive Sudoku

 What's the least interesting type of Sudoku?  I think it's the typical odd/even variety, which boils down to two separate puzzles, each of which is about half as difficult as a normal one.

So here's a twist!  It's an odd/even Sudoku plus a nonconsecutive Sudoku.  Standard Sudoku rules apply, except that each white cell will contain an odd number, gray cells contain the even numbers, and that no adjacent cells contain consecutive numbers.


Unfortunately, I was not able to make it much more than half as difficult as a normal Sudoku.

Also, only people who voted today or aren't Canadian are allowed to do this one.





Wednesday Puzzle #0

I'm back!  ... and ripping off other people's ideas again!

This is an Extra-Space Sudoku.  The format is from the book 'Mutant Sudoku', by Thomas Snyder and Wei-Hwa Huang.

Fill the white cells with the digits 1-9, such that each row, column and marked 4x4 box contains no repeated numbers.  The grey cells are unused.




Bonus points for finding the secret message.





Masyu vs. Slitherlink


Masyu vs. Slitherlink (updated):

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First Nurikabe

Another nothing special: Nurikabe!  Rules:

Colour several squares black such that each number in the grid belongs to a white island containing that number of squares. The islands cannot be orthogonally adjacent. The black cells represent the ocean, and must be one contiguous set. Also, no 2x2 square can be all black.
 

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Masyu

Nothing exciting, just a normal Masyu. Rules:

Find a single closed loop passing through each of the black and white circles. The path passes through the centers of adjacent squares. When passing through a black circle, the path must make a 90 degree turn and extend at least two squares in both directions. When passing through a white circle, the path must go straight and must make a 90 degree turn in at least one of the adjacent squares.

 

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