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Category Archives: Solving tips
Griddlers solving – advanced techniques (Bordering)
A while ago I posted an explanation of an advanced Griddlers/Picross/Nonograms/Hanjie solving technique called Bordering. Here is another example of the bordering technique applied in a different way. Consider this partial nonogram in which only the top few rows are shown. Focus on the first three rows and the “7” clues in them. Where can […]
Also posted in Picross
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How To Solve Picross (advanced)
It’s strange that I have never posted any solving techniques for PicrossHanjieGriddlersNonograms puzzles. I’ve explained some of them in my picross books, but never here on the website. So, that’s about to change and I’m immediately starting with an advanced solving technique, which I call “bordering“. Consider this example (it’s a part of a griddlers […]
Also posted in General, Picross
3 Responses
How to solve Diagonal Sudoku X
I realize that I’ve never posted two sudoku solving techniques which are specific to Diagonal Sudoku puzzles. Here they are. Diagonal and nonet interaction This one is a simple extension of the “row/column and nonet interaction technique”. Just look at this sample puzzle which has been solved using the standard techniques up to this point: […]
Also posted in Sudoku Variants
Tagged crossover, Diagonal Sudoku, Diagonal Sudoku Crossover, how to solve, IQ, sample puzzle, solving technique, sudoku solving technique, sudoku x, technique
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How to solve Hitori: basic techniques
Solving Hitori puzzles is about recognizing patterns. I will show you some examples of those patterns. They can be split into two groups, one of those that depend solely on the initial positioning of numbers, and another group of patterns that depend on the black and white cells which have been painted in the solving […]
Also posted in Puzzle variants
Tagged EASY, HITORI, how to solve, IQ, solving technique, technique
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How to solve Hidoku: “cornering” (or “deadend”)
Here is an explanation of a Hidato solving technique that some people might find obvious and they use it without even thinking of it as a special technique. But, for those who still struggle with the more difficult puzzles, here is a quick guide of the technique that I call “cornering“. It can be used […]
Also posted in Puzzle variants
Tagged CONSECUTIVE, hidato, hidoku, how to solve, IQ, solving technique, technique
2 Responses
The Law of Leftovers (LOL)
I promised to explain this technique, which applies to Jigsaw Sudoku (aka irregular blocks) puzzles, a while ago, so it’s time to keep the promise. You can find the same technique explained on various other sites, too. This technique is somewhat similar to innies/outies which is used for solving Killer Sudoku puzzles, but there is […]
Also posted in Jigsaw Sudoku, Killer Sudoku
Tagged IMPORTANT, innie, INNIES, innies and outies, IQ, Jigsaw Sudoku, Jigsaw Sudokus, killer, killer sudoku, outie, OUTIES, overlapping sudoku, sample puzzle, samurai, solving technique, sudoku solving technique, Sudoku Variant, Sudoku Variant Puzzle, technique, twodoku, variant
3 Responses
Swordfish
A while ago I explained the XWing solving technique. Recently I shown my explanation of other basic, Classic Sudoku solving techniques. The only remaining solving method that I don’t consider trial and error is Swordfish. So, to complete the list of Sudoku solving tips, here is an example of a Sudoku puzzle that can be […]
Posted in Solving tips
Tagged Classic Sudoku, IQ, Perfect Sudoku, solving technique, solving tip, solving tips, sudoku solving technique, swordfish, technique, xwing
34 Responses
Classic Sudoku Solving Techniques
It’s about time I finally explained the basic (and most common) Sudoku solving techniques. Most of you are already familiar with these, but for those who aren’t – I’d like to show my explanation. These techniques are used in ALL sudoku puzzles – Classic, Killer, Samurai and others. Make sure you fully understand them before […]
Also posted in Samurai sudoku
Tagged Classic Sudoku, hidden subsets, interactions, IQ, killer, naked subsets, pencilmarks, samurai, solving technique, SUBSETS, sudoku solving technique, swordfish, technique, xwing
10 Responses
All puzzles have ONE solution only!
Alright, before you claim that some puzzle has more than one solution, do this: 1. For Samurai puzzles, read this article 2. For other puzzles, make sure the puzzle is not an “X” (diagonal) 3. For puzzles from The Washington Post and The Express, read this post (and also read the article from point 1). […]
Also posted in General, Puzzle books, Samurai sudoku, Washington Post
Tagged samurai, Washington Post
1 Response
Samurai Sudoku rules
I’ve been asked a few times to post some Samurai sudoku solving tips. Well – there aren’t any special tips that apply exclusively to Samurai. Standard Sudoku rules apply, but to make things clear for newcomers, I’d like to give a brief set of instructions. Rules of Samurai Sudoku 1. Each Samurai Sudoku puzzle consists […]
Also posted in Samurai sudoku
Tagged Classic Sudoku, HARD, hidden subsets, instructions, interactions, IQ, rules, samurai, Samurai Sudoku, solving tip, solving tips, standard sudoku, SUBSETS, suggestions, swordfish, technique, xwing
48 Responses