Archive for January, 2010
Samurai Killer Calcudoku
Jan 28th
Samurai Killer Calcudoku puzzle
I haven’t posted much here recently because I’ve been spending my time on Sudoku Xtra, so here’s a large puzzle to fill the void a bit.
This is a five-grid Samurai Killer Calcudoku:
- Place 1 to 9 into each row, column and 3×3 box of the five underlying 9×9 Sudoku grids
- Place numbers into the Calcudoku dashed-line cages to fulfil the results at the top-left of each cage. The given operator when applied between all of the numbers must give the stated result, e.g. the solution to “5+” could be “2+1+2″. For subtraction and division start with the largest number, so for example “3-” could be “6-3″.
- Numbers can be repeated in Calcudoku cages, subject to the row, column and 3×3 box constraints.
Unlike my other puzzles I haven’t used any symmetry in this one, but I’m not sure it’s really that obvious on a puzzle like this one. It’s not especially hard, but with so many places to potentially go it might take you a little while.
Good luck! 
Sudoku Xtra issue 3 now available!
Jan 25th
I’m really pleased to announce that issue 3 of Sudoku Xtra magazine is now available for download!
This issue is packed full of all sorts of puzzles, including SOS (Samurai Outside Sudoku!), Toroidal Inequalities and many more. Community puzzles include picture puzzle Mosaic from Clarity Media, and some fantastic Slitherlink-Masyu cross-over puzzles called Shotgun Slitherlink from David Millar of The Griddle. There’s also some brilliant Klump and Navigrid puzzles from Vexus Puzzle Design.
With 121 puzzles it will almost certainly take you far more than the month until issue 4 to complete, so you’d better get hold of it as soon as possible!
Pre-printed versions will be available in the next couple of days, but you can download and print it yourself immediately!
Outside Sudoku
Jan 14th
Here’s something new (for me at least) – an Outside Sudoku puzzle. This one’s 6×6, just to get the ball rolling, but I have some larger ones (including some Samurai ones) ready for Sudoku Xtra issue 3!
The numbers outside the grid reveal some, none or all of the numbers that go somewhere in that same row or column anywhere up to the first bold line encountered – in other words, they go in that row/column of the adjacent bold-lined region. If more than one number is given then the order need not necessarily be the same as that shown.
For example, look at the top-left. The 4 and the 1 both go somewhere in the first three squares of the top row, but not necessarily in that order. Below them the 6 goes in the first three squares of its row, and at the bottom-left of the puzzle the 4 and 5 go into the bottom two squares of the left-most column.
Then just follow through as a regular Sudoku until it is solved. Good luck!
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