The complete course
The Sudoku Learner's Guide
A complete course in seeing the logic. Learn the rules, understand the techniques, and build your confidence one well-explained step at a time.
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The Sudoku Learner's Library
Available nowPractice! X-Wing Sudoku
Guided Pattern Training from First Recognition to Independent Solving
Learn to spot X-Wing patterns through progressive, deliberate practice. Turn a technique you understand into one you can recognise.
A good fit for
Solvers who know the basics and want focused practice with X-Wing patterns.
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- ISBN
- 9798175488020
- ASIN
- B0HL56GS2Z
A look inside
Is it an X-Wing? Check the conditions.
Try the first two exercises in Part I: See the X. The candidate notes are ready for you.
Read the two-page sample (PDF) Choose a page to view it full size.
Read the example in text
Each exercise asks you to examine a candidate digit in named rows or columns. Identify the cover lines and four corners, or explain why the position does not form an X-Wing.
Check that each base line has exactly two positions for that digit and that the two pairs align. A rectangle alone is not enough. Answers are referenced in the complete book.
More ways to learn.
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Discovery
25 Days of Christmas Sudoku
A Sudoku Advent calendar for December 2026. Solve one moderate puzzle each day from December 1 to Christmas Day, then use your answers to reveal another part of a festive drawing.
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Start Here: Hard Sudoku with Visual Hints
Take on hard Sudoku with a little direction when you need it. Hints point you towards your next move while leaving the discovery to you.
Available now