Here is something brand new, well, for this site anyway: Hanjie puzzles, previously known under the name “Tsunami”. I have been supplying these puzzles to Euromedia Finland since July who are publishing a Hanjie magazine every month. Each issue of their magazine contains 31 of my Hanjie puzzles in various sizes, from 10×10, 15×15 and […]
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 […]
Someone 😉 complained and asked for more new variants and specifically for cons/non-cons puzzles. So here it is – first ever Consecutive Butterfly (4 in 1) Sudoku puzzle. “Pipes” (“|” symbols) between cells mean that those cells must contain consecutive numbers. If there is no pipe – those cells can’t contain consecutive numbers. This second […]
I realized that it’s been quite a while since I last posted a “vanilla” Samurai Sudoku puzzle, so today, in addition to our regular Tuesday’s Samurai Sudoku X, you get a special treat of another Samurai puzzle. Samurai Sudoku for Tuesday, August 29 – difficulty IQ (not for the fainthearted!) Click on the puzzle thumbnail […]
Here is another of our unique Butterfly Samurai puzzles! It consists of 20 (twenty) classic 9×9 Sudoku sub-puzzles. There are 5 groups of 4 sub-puzzles. Each group of 4 is arranged Butterfly-style, and those 5 groups are arranged Samurai-style. Please make sure you understand how the puzzles are arranged before attempting to solve the puzzle. […]
To be honest, I haven’t kept track of all the different sudoku variants that I have posted and which ones I never posted, but I think that this is the first Consecutive TwoDoku X sudoku puzzle ever. I will check in my archive when I find some time to see if this is true or […]
I have only posted one puzzle of this kind so far and here is a new one – “” puzzle in Samurai layout! No given numbers to begin with, instead, there are greater than and less than signs all over the place. Still, this puzzle can be solved by using deduction only, no guessing is […]
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 […]
