There have been no updates for about two weeks because I was away from home for a while. I will make sure to put everything into place now and also I will start working on making some major improvements on this site (more about that soon), but in the meanwhile, I’d like to present you […]
Well, folks, one year has passed since I posted my first INSANE Killer Sudoku puzzle. Although it wasn’t “perfect” (it contains singleton cages), most probably this site wouldn’t become popular if it hadn’t been for that puzzle. It was by far the most difficult Killer Sudoku puzzle that the world had seen at that time […]
How many Sudoku variants are there? I don’t know. To calculate, you’d have to multiply the number of overlapping types with the number of variants that impose additional constraints on each puzzle. I produce puzzles with 5 different constraints: Killer, Odd/Even, Greater/Less than, Consecutive, and Non-Consecutive. But then again, you can put an “X” on […]
It’s been a while since I last posted a Butterfly Killer, let alone one with the “X” factor. So, here it is – and to spice it up a little, I made it quite hard (altho I expect someone to get back in 20 minutes and say it was way too easy). So, you get […]
Somehow butterfly puzzles have been neglected in the past few months and it’s time to rectify. A quick reminder – this breed of overlapping sudoku puzzles was suggested by udosuk and implemented by myself. There are 4 “classic” 9×9 Killer Sudoku puzzles inside this one. They all overlap and they all must be solved according […]
It’s been a while since I last posted a Killer Samurai puzzle so here is a new one for those of you who like the ultimate Sudoku challenge! Click on the puzzle thumbnail to access the puzzle.
Just so you don’t think that I disappeared off the face of the earth (or sea?), here is a new Twin Killer sudoku puzzle for you! Two puzzles that do not overlap. Instead, they are placed next to each other, but most importantly – they both have the same solution. Or, to be more precise, […]
For those who don’t get enough challenge from Killer Samurai Sudoku nor from Harakiri nor from Twin Killer nor from any other overlapping, odd/even, consecutive or greater/less than sudoku – here is the ultimate challenge – my second ever Clueless Killer Sudoku. If your friends or family call you names when they see you solving […]
Another Sudoku variation that I have adopted from my readers: Twin Killer Sudoku. Two puzzles that do not overlap. Instead, they are placed next to each other, but most importantly – they both have the same solution. Or, to be more precise, you are looking for one solution that solves both puzzles. Now, I had […]