What Is a Triple in Sudoku?

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Because they are the only occurences in the rows, all three columns can claim ‘3’. In the highlighted cells, ‘4’ occurs in only two cells in each of the two rows, and the cells belong to the same two columns. If one of the highlighted cells in one of two columns is ‘4’, the diagonal cell in another column must be ‘4’.

Which is the best strategy for solving Sudoku?

What is the best strategy for Sudoku? The best strategy for Sudoku is to start by solving the easy parts first. Look for a single empty square in a larger square, check for singular empty squares in the rows and columns, and scan the rows and columns to fill in larger squares. Thanks! Can all Sudoku puzzles be solved without guessing?

When is a number a sole candidate in Sudoku?

When a specific cell can only contain a single number, that number is a “sole candidate”. This happens whenever all other numbers but the candidate number exists in either the current block, column or row.