Remember the TriDoku puzzles? Here is a new one. It’s a second one in Killer format, give it a try! Killer TriDoku puzzles: all standard rules of Killer Sudoku apply + of course the TriDoku rules. TriDoku Killer Sudoku for Monday, February 22, 2010. Difficulty: THINKER (when you click&download the puzzle it won’t look so […]
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 […]
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, […]
As you may have noticed, I’ve changed things a little on the site, by removing some of the daily puzzles. While Daily Killer Sudoku and Daily Sudoku variation will remain, as well as bi-Weekly Samurai Sudoku, all other puzzles will be posted here, on the main page of the site. Expect at least a couple […]
Here is very difficult Killer Sudoku puzzle. There are two Zero Killer Sudoku puzzles overlapping each other in the TwoDoku format. The difficulty is rated IQ. What do you think? Zero Killer Twodoku for Saturday, September 20, 2008 Click on the puzzle thumbnail to access the puzzle.
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 […]
