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Tag Archives: how to solve
Binary Puzzles
Here is another novelty: Binary Puzzles, also known as TAKUZU. Binary Puzzles are played on square grids of any even size: 6×6, 8×8, 10×10 etc. Your goal is to fill the grids with 0s and 1s, following these simple rules: 1. There can be at most two 0s or at most two 1s next to […]
Posted in Free sample puzzles, Puzzle variants
Also tagged Binary Puzzle, Binary Puzzles, Binary Takuzu Puzzle, DIFFICULT, EASY, rules, TAKUZU, WARNING
5 Responses
Killer Sudoku 10×10
When was the last time I posted a Killer Sudoku variant puzzle for the first time? I can’t remember. Well, nearly 8 years (I’m a bit slow, you know) after publishing first Killer Sudoku, it occurred to me that there is no reason not to add the 0 into play. So… ladies and gentleman… a […]
Posted in Free sample puzzles, Killer Sudoku
Also tagged IQ, killer, killer sudoku, rule of 45, technique, variant
14 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: […]
Posted in Solving tips, Sudoku Variants
Also tagged crossover, Diagonal Sudoku, Diagonal Sudoku Crossover, IQ, sample puzzle, solving technique, sudoku solving technique, sudoku x, technique
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Hitori puzzle: big and difficult
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 […]
Posted in Puzzle variants, Solving tips
Also tagged EASY, HITORI, IQ, solving technique, technique
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Hitori
UPDATE: After some debate with udosuk (see comments), I’ve decided to adopt the rule that every cell must be either black or white, it can’t be left “undecided”. I’ve changed the original puzzle accordingly so you can download it now. At the end of last year, I announced that I will be introducing more types […]
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 […]
Posted in Puzzle variants, Solving tips
Also tagged CONSECUTIVE, hidato, hidoku, IQ, solving technique, technique
2 Responses
Advanced Sudoku and Kakuro
Since my Sudoku K book is still a few months away, it is time to introduce another book with my Killer Sudoku and Samurai Sudoku puzzles and puzzles from other puzzle creators. The book I’m talking about is called “Teach Yourself: Advanced Sudoku and Kakuro” by Nick ‘Afka’ Thomas. A few words about the author […]
Posted in Kakuro, Killer Sudoku, Puzzle books, Samurai sudoku
Also tagged BOOK, books, HARD, INSANE, IQ, KAKURO, killer, killer sudoku, samurai, Samurai Sudoku, standard sudoku, swordfish, technique, THINKER, xwing
8 Responses