Posts tagged Jigsaw

Box-Jigsaw Sudoku

Sudoku Box-Jigsaw 9×9 1 puzzle
I haven’t posted a puzzle for a good while, so I thought it was time to fix that with this Box-Jigsaw Sudoku puzzle.

The puzzle combines regular Sudoku with Jigsaw Sudoku. Just place 1 to 9 once each into all of the nine rows, columns, 3×3 boxes (indicated by both shaded and unshaded background areas) and bold-lined jigsaw regions.

Jigsaw Blackout Sudoku

Blackout Jigsaw Sudoku 9×9 puzzle
If you like tricky Sudoku variants, here’s one just for you! It’s a Blackout Sudoku with Jigsaw regions.

The rules are simple: in each row, column and bold-lined jigsaw region you must place 8 different digits in the range 1 to 9.  Don’t place a digit on the shaded squares.

If you prefer you can consider it as a standard jigsaw sudoku where the black cell can represent any value, and the value can be different for the row, the column and the jigsaw region.  For example the shaded square on the top row could take the place of a 7 in that row, an 8 in its column and a 2 in that jigsaw region.

Good luck! :)

Jigsaw Sudoku 6×6

Jigsaw 6×6 puzzle 2

Jigsaw 6×6 puzzle 1
I just made some Jigsaw Sudoku puzzles for a book and had a couple spare which I thought I’d post here.  Just place A to F once each into every row, column and bold-lined jigsaw shape.

Sudoku [Jigsaw] 6×6

Sudoku 6×6 puzzle

Jigsaw 6×6 puzzle

I had a couple of 6×6 Sudoku puzzles left over when making issue 58 of Sudoku Pro magazine, so I thought I’d post them here.

Just place 1-6 into each row, column and bold-lined area.

Toroidal Killer Toroidal Jigsaw Sudoku

Toroidal Killer Jigsaw Toroidal puzzle

A while back someone asked for some variant toroidal patterns on PuzzleMix, so I was just adding a couple of them to the daily puzzles section when it occurred to me that I could put up a few toroidal killer sudoku too, for a change.  However I then realised that the code which creates the HTML will need editing to cope with toroidal regions, but I knew my PDF code was more flexible… and then I thought it would be great to mix this with some toroidal jigsaw regions too… and here’s the somewhat confusing result!  A Toroidal Killer with Toroidal Jigsaw regions.

Now if you enjoy this twisted beast let me know, otherwise I probably won’t make any more of them! :)

Full rules:

  • Place 1 to 9 in each row, column and bold-lined jigsaw region
  • Place numbers so that the dashed-line cages add to the total given
  • No number can repeat in a dashed-line cage.
  • Some jigsaw regions and cages ‘wrap around’ the outside the puzzle, continuing at the start/end of the same row/column

Good luck! :)

Jigsaw Killer Sudoku

Killer Sudoku Jigsaw puzzle

I’ve recently been working on refreshing the content for, my play-online puzzle site, and one of the puzzle types I’ve been making is Killer Jigsaw Sudoku, where you not only have the jigsaw-shaped Killer regions but also jigsaw shapes instead of the regular 3×3 Sudoku boxes.

So I thought it would be a good idea to post one of these puzzles here – they can be quite tricky, at least until you get your head around the difference between these and regular Killer!

The rules are simple:

  • Place 1 to 9 in each row, column and bold-lined region
  • Place numbers in the dashed-line cages that add up to the given total for that cage
  • No number can be repeated in a dashed-line cage

Good luck! :)

Inequality Sudoku

Inequality 2-grid Samurai Sudoku

Inequality jigsaw 6×6 Sudoku puzzle

On the Sudoku Xtra forums Marilyn suggested the great idea of an inequality Samurai puzzle for issue 2, so I’ve been having a look at doing this. And here’s the first result!

I’ve started off with a regular 6×6 jigsaw Sudoku, but have added inequalities, just to get you warmed up, then I’ve included my first ever Samurai Inequality Sudoku puzzle, albeit a 2-grid one for now.

You’ll notice in both puzzles here that I have included all inequality arrows, so you have far more information than you need – this is deliberate, to make them easier! On the 6×6 puzzle there are five really nice diamond shapes in the centre area, but in general I think having all the arrows is ugly (or lazy!) so I don’t plan to include them again in future (just as I’ve never included them in past published inequality/Futoshiki puzzles).

The rules of Inequality Sudoku are pretty simple – just place the numbers as you would in a regular Sudoku (or regular Jigsaw Sudoku in the 6×6 case), but obey the less-than (”<”) and greater-than (”>”) signs between squares.  These indicate that the value of the number in a square is either less than or greater than its neighbour. And that’s it! :)

Good luck!

Jigsaw Sudoku

Sudoku Jigsaw Medium puzzle

I’m adding features back in to my new puzzle assistant front end code so today I thought I’d post the standard Jigsaw Sudoku puzzle that was my test subject – just fit 1-9 into each row, column and bold-lined shape.

Two-away Jigsaw 8×8

Two-away Jigsaw 8×8 puzzle

Continuing with Two-away puzzles, I thought today I’d post a somewhat smaller challenge – an 8×8 Jigsaw Sudoku version.

The rules are pretty much what you’d imagine: place 1 to 8 into each row, column and bold-lined jigsaw piece. Numbers with a grey bar between them must have a difference of 2 (e.g. 1&3) and numbers without a grey bar between must have a difference that’s not 2. (This is important to ensure a unique solution!)

Good luck! :)

Two-away Samurai Jigsaw

Two-away Samurai Jigsaw puzzle

Here’s a puzzle for the weekend – it’s a 5-grid samurai sudoku where in the corner grids a couple of the 3×3 regions have had their outlines tweaked to turn them into jigsaw sudoku puzzles, with full 8-way symmetry.  There are very few givens, which means you’ll need to take full advantage of the two-away markers that are also in the grid.  The grey rectangles indicate all neighbouring squares where the difference is 2 (e.g. 1&3 or 6&8) – even without precise values they can also be useful for quickly indicating where a chain of squares are all odd or all even.

Good luck! :)