**about 5 years ago** - No comments

Just a quick heads-up that PuzzleMix, my site where you can play a wide range of puzzles online, now supports touch screen play for all of the number entry puzzles – so that’s Sudoku, Killer Sudoku, Futoshiki, Calcudoku, Skyscraper, Sudoku X, Kropki Sudoku, Killer Sudoku Pro, Jigsaw Sudoku, Consecutive Sudoku, Wraparound Sudoku, Sudoku XV, Killer More >

**about 7 years ago** - 1 comment

Calcudoku+ 7×7

I had a request for a 7×7 Calcudoku-esque puzzle that uses only + operations, so I thought “why not?”. And here it is.

**about 7 years ago** - No comments

Calcudoku 6×6 puzzle

It’s been an age since I’ve posted new puzzles on here directly, mainly because all my puzzle-making effort has been focused on Sudoku Xtra, Sudoku Pro, PuzzleMix and a major book I recently completed.

In any case, there’s no time like the present to fix that so here’s a simple 6×6 Calcudoku. Just place 1 More >

**about 8 years ago** - 1 comment

Samurai 3-grid Calcudoku 6×6 puzzle

I’ve been posting a few new varieties of Sudoku puzzle in the daily puzzle section of PuzzleMix (i.e. the subscription section, which costs less than £1 a month for well over 1,000 puzzles a year). These aren’t especially unusual variations, but I’ve done a few different mixes (e.g. Sudoku-X 12×12 and More >

**about 8 years ago** - 3 comments

Samurai 8-grid Calcudoku puzzle

Here’s probably the largest Calcudoku puzzle you’ve ever seen! It’s made up of 8 underlying 9×9 grids, each of which must have 1 to 9 placed into each row and column, and then on top of this I’ve added the familiar Calcudoku regions.

For each Calcudoku region just place numbers such that the More >

**about 8 years ago** - 1 comment

Futoshiki 7×7 puzzleFutoshiki 6×6 puzzle

It’s been a little quiet here the past week or so due to circumstances beyond my control, but in preparation for the launch of Sudoku Xtra issue 2 tomorrow I thought it would be fun to post a couple of left-over puzzles here. These are nothing particularly unusual, I’m afraid – More >

**about 8 years ago** - 1 comment

Samurai Star Inequality puzzle

I’m tempted to just say “good luck”, because frankly I think you’ll need it! Not of course in the literal sense, since this is an entirely logical problem, which requires absolutely no guess work, but in terms of finding the right areas to make progress quickly.

So having started at the end, let More >

**about 8 years ago** - 3 comments

Inequality 2-grid Samurai SudokuInequality 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 More >

**about 8 years ago** - 2 comments

Toroidal Calcudoku puzzle

Another easy Calcudoku in terms of its logic, although this one is a little trickier in practice since it’s 7×7 and is toroidal, meaning that some of the regions wrap around the edges of the grid and continue on the square directly opposite on that row/column. Other than, just place 1 to 7 More >

**about 8 years ago** - 3 comments

Calcudoku 2 puzzCalcudoku 1 puzz

Today I was producing a few easy Calcudoku for a new book I’m working on, and had some left over so I thought I’d post them here. Nothing too special, but there’s a little bit of nice symmetry, which you don’t seem to generally find in published Calcudoku puzzles. (I don’t More >

Spittledungabout 8 years ago

That was a fun proof of concept. I solved it real quick on scratch paper rather than use printer ink for a small puzzle. Doing the 1728x was enjoyable. This will be interesting when expanded to 9×9 format.