This should be a tough one – perhaps too tough? It’s only rated “BRAIN”, but the layout makes it quite difficult, I think. 5 overlapping Jigsaw Sudoku puzzles put together in the Flower Sudoku (Gattai-5) layout, which is similar to Samurai Sudoku but not exactly the same. Make sure to use the “Twin Nonets” solving […]
In case you didn’t see this one coming, well then… you don’t know me and should be coming to this site more often! 🙂 Killer TriDoku puzzle: all standard rules of Killer Sudoku apply + of course the TriDoku rules. Has anyone else published this kind of puzzle until now? Killer TriDoku for Monday, February […]
If you can have Diagonal Sudoku or Sudoku X puzzles, why not have a TriDoku X? Although it looks more like a TriDoku *, I decided to keep the “X” in the name. Perhaps it could be called a TriDoku Star? Whatever you call it, I think the additional rules are obvious: in addition to […]
Here is another variant of Outside Sudoku puzzles: a consecutive Sudoku. I’m sure you are aware of the rules, but lets repeat that the numbers in cells that are connected by the pipe “|” symbol MUST BE CONSECUTIVE. Numbers is cell that are have no pipe symbol between them MUST NOT BE CONSECUTIVE, they have […]
I don’t think I’ve ever posted a puzzle like this one. Yes it is essentially a Killer puzzle. Yes, it’s also an overlapping sudoku puzzle, Gattai-2 (TwoDoku). But it also has some similarity with Calcudoku puzzles, because you must use all four operators (+, -, *, /). Killer TwoDoku with all ops for Tuesday, February […]
It’s been a while since I last posted a Killer Sudoku variation. As far as I can remember, you folks liked the Butterfly layout of the puzzles, so here is an overlapping, 4-in-1 (Gattai-4), Killer Butterfly Sudoku puzzles. You can also find these puzzles in my Killer Sudoku Compendium book. Killer Butterfly Sudoku for Friday, […]
Another novelty in 2010 – Outside Jigsaw Sudoku. Read the rules of Outside Sudoku first. And then, twist it a little – it’s a Jigsaw (Irregular) Sudoku puzzle! UPDATE: One clarification about the rules of Outside Jigsaw Sudokus: The clues tell you which numbers appear in the 3 closest cells in that row/column. They are […]
Some may not like the fact that today’s puzzle isn’t actually a SquareWisdom puzzle, instead, it’s actually a true hybrid between Killer Sudoku and Kendoku. Having implemented Kendoku puzzles into my solver&generator program, it was a no brainer to extend it a little further and allow all four operators for my Killer Sudoku puzzles. And […]
The two anti-chess variants anti-knight and anti-camel cannot both exist on a sudoku grid with the standard 3×3 nonets, so I’ve removed the nonets!  In chess, a knight moves 2 cells horizontally and 1 cell vertically or vise versa. Since this puzzle is anti-knight, none of the red X’s below can contain a 5 because the center […]
Djape has kindly granted me my own corner as well, which I will use to present my own hand-designed Saturday Specials. We’ll start things off with a big one. Samurai: This puzzle consists of 5 overlapping grids, which on their own don’t neccessarily have a unique solution, but together they do. X: Along the diagonal lines […]
