about 11 months 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 1 year 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 1 year 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 1 year 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 2 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 2 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 2 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 2 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 2 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 >
about 2 years ago - 3 comments
Consecutive Samurai CalcuDoku puzzle
Now this is an interesting puzzle! At first glance it looks like it can’t possibly have a unique solution, since there are no givens and only 9 cages on the entire 3-grid Samurai puzzle (made up of 6×6 grids). But in fact it uses only simple logic to solve, and it unravels More >
about 2 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.