about 11 years ago - Comments Off
I’m currently working on a forthcoming book (The Mammoth Book of Brain Workouts, published next year in the UK by Constable & Robinson, and in the US by Running Press), and have been experimenting with something I wrote about briefly a few years ago but hadn’t really tried since – variants on Numberlink.
Numberlink puzzles have More >
about 12 years ago - Comments Off
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 13 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 14 years ago - Comments Off
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 14 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 14 years ago - 4 comments
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 More >
about 14 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 15 years ago - 1 comment
Inequality Calcudoku puzzle
Here’s a fun little puzzle – a Calcudoku Inequality puzzle.
Just place 1 to 6 into each row and column whilst obeying the bold-lined cages’ operator totals. These give the result of applying the stated operator between all numbers in that region, so for example the result of adding together all the squares in More >
about 15 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 15 years ago - 3 comments
Toroidal Number link 8×8 puzzle
Number Link at sizes up to around 10×10 may not necessarily be hugely challenging for everyone, but I bet you now that this puzzle certainly will be! Despite being only 8×8 it is really very difficult indeed. Or perhaps that’s just me – I’d love to hear that someone finds it More >
about 15 years ago
I enjoyed the puzzle.
Just wanted to make something clear: When I say, “This puzzle is too easy, make them harder.” … That doesn’t always translate to “Make it a toroidal”.
Something you might try: I found a couple of “Mystery KenKen” online where you get the cage number but not the math operator. The 9×9 was very interesting.
about 15 years ago
That’s actually really funny, about the toroidal puzzles!
Truth be told I haven’t yet made any missing operator Calcudoku (i.e. KenKen, TM) but it is definitely on my to-do list! Of course it’s not really any more instrinsically complex than regular Calcudoku – you’re just expanding the search space for each clue a little (or a lot!).