Sudoku Primer 138 - subscriber request - patterns and techniques

This puzzle was requested by Timothy Dunbar, a channel subscriber.

It is a hard puzzle. A combination of patterns and techniques are used to solve it.

► Offset pattern
► twins
► triplets
► row/column completion
► ambiguity rule
► solving sections

Go to www.sudokuprimer.com to learn about techniques used to solve puzzles. There is also an index of all of the videos on YouTube on this channel.

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Видео Sudoku Primer 138 - subscriber request - patterns and techniques канала Harold Nolte