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A hidden triple occurs when three cells in a row, column, or block contain the same three numbers, or a subset of those three. The three cells also contain other candidates. In the above example, 1, 2, and 5 (shown in red) are a hidden triple. Those three numbers are only seen in three squares in the row.
A naked single arises when there is only one possible candidate for a cell; a hidden single arises when there is only one possible cell for a candidate. Despite the name, hidden singles are far easier to find than naked singles. You should always start a Sudoku by finding all the hidden singles. No marks required!
Why am I getting worse at Sudoku?
Anyone who taxes their brain on the number grid, as well as taking on crosswords and other word games, could be using up energy needed to exercise, psychologists claim. This might explain why some people feel physically exhausted after a puzzle even though they have not even needed to get out of their chair.
What is the fastest way to solve a Sudoku puzzle?
Try slicing and dicing. Don’t spend too long on it though.
What is the key to solving a Sudoku puzzle?
The obvious way to solve a sudoku puzzle is to find the right numbers to go in the squares. However the best way to start is the other way round – finding the right squares to hold the numbers. This uses a technique called ‘crosshatching’, which only takes a couple of minutes to learn.
How to create a solved sudoku?
Look for a single empty in a larger square. Check each square to see if it has a single square open.
How do you solve Sudoku?
There are two main techniques one can use to solve a Sudoku puzzle; Crosshatching and Penciling In. These two techniques are simple, straightforward, reliable, and sufficient in solving most standard Sudoku puzzles. It is important to understand that all Sudoku puzzles require an iterative approach.