Expert Sudoku Solver » Easy Sudoku Techniques

Sudoku Techniques (Part 4) Box – Box interactions

martinp — Mon, 22 Jun 2009 18:46:48 +0000

The last technique we looked at can be extended slightly as candidates are exposed more clearly across the grid. In fact there are going to be times when we can’t directly find a new given in a box but we can limit the possibilities for our candidates so that they form a new “line” of [...]

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Sudoku Techniques (Part 4) Box – Box interactions

Sudoku Techniques (Part 3) – Box and Line Interactions

martinp — Fri, 19 Jun 2009 17:06:01 +0000

Before we get onto the next technique, I have an apology to make. I set you on an impossible task at the end of the last post, suggesting that there might be a hidden single in 2,7 which of course was complete nonsense! Oh well….my long road to being an “expert” sudoku solver just got [...]

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Sudoku Techniques (Part 3) – Box and Line Interactions

Sudoku Techniques (Part 2) – Hidden Singles

martinp — Wed, 17 Jun 2009 13:34:44 +0000

Today’s sudoku technique follows on closely from the previous one and still counts as an easy hint for a sudoku solver. Here, we are still looking for singles but in this case they have become “hidden singles”. All this means in real terms, is that the single has other candidates in the cell alongside it. [...]

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Sudoku Techniques (Part 2) – Hidden Singles

Sudoku Techniques (Part 1) – Naked Singles

martinp — Tue, 16 Jun 2009 21:21:21 +0000

Now that we have some ways to describe the layout of a sudoku grid, we can start to build up the techniques needed to solve sudoku puzzles. I intend to cover a specific method in each post but I will mark each one with a difficulty level so that you can jump in wherever you [...]

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Sudoku Techniques (Part 1) – Naked Singles

Speaking like a sudoku solver

martinp — Mon, 15 Jun 2009 11:40:32 +0000

Before we get into the meat of discovering and filling in new numbers in your sudoku grid, I thought it would be worthwhile to go right back to the beginning and describe some of the names used by the real experts of sudoku.I’ll start with what is called “classic” sudoku – we can look at [...]

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Speaking like a sudoku solver