Introducing Slitherlink (loop the loop, takegaki, fences, dotty dilemma… you name it)
Another kind of puzzles that I’ve started creating recently… Slitherlink!
These puzzles are also known under many different names. Slitherlink puzzles are not a Sudoku variant. They can be of any size and the rules are:
1. Connect the dots to form a single loop with no points of intersection.
2. The clues given tell you how many sides of each cell belong to the loop. In other words, how many lines there are around the number. If there is no number given, it is unknown (it doesn’t mean it’s zero).
Solving techniques are numerous. I will soon start posting a series of solving methods. But here are a few tips: start with the corners and think. Also, always remember the rule number one: no intersections! This effectively means that each dot has either 0 or 2 lines coming out of it! It can’t have 1 because the loop must be, well, a loop – it must be closed. It can’t have 3 or 4 because that would be an intersection. So it must be 0 or 2.
I’m still working on the difficulty. So your input on the difficulty of this puzzle is appreciated. I believe this one is relatively easy – I still haven’t implemented all solving methods.
Slitherlink 13×13 for Monday, February 8, 2010.
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| The solution is here |
Enjoy and do comment, please! 
Killer Sudoku fans
February 9th, 2010 at 5:29 am
Nice! Not too hard, and the size is about right.
I wish you can create more Nikoli puzzles in the future, for example: Heyawake, Masyu, Yajilin, LITS, Yajisan-Kazusan, Inshi no heya (which is similar to the ‘Kendoku’ puzzles except that only multiplication is used and all ‘cages’ are rectangles or squares).
You can search all these rules in google or wikipedia.
February 19th, 2010 at 2:28 am
I´m OK with nikoli. The size is the right one. I´ve enjoyed it too much. Don´t forget to post some more “slitherlinks”.
March 4th, 2010 at 3:50 pm
[...] The rules of Slitherlink (Takegaki, loop-the-loop, loopies…) can be found in my introductory article. [...]