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.
Available now
The Sudoku Learner's Library
Available nowCandidates Done! Hard Sudoku
Just Start Solving
Start with the pencil marks in place. Spend your solving time exploring patterns and making deductions, with the initial setup already done.
A good fit for
Solvers who enjoy the logic of hard puzzles and want to skip the candidate setup.
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- ISBN
- 9798175487771
- ASIN
- B0HL53KC3M
A look inside
Your notes are ready. Start with the logic.
The first two puzzles in Part I: Find Your Flow, with starting candidates already printed.
Read the two-page sample (PDF) Choose a page to view it full size.
Read the example in text
Large digits are givens. The smaller digits show every candidate initially allowed by the givens in that cell's row, column, and box.
Cross out candidates as you rule them out. After placing a digit, update its row, column, and box. There are no shaded hints or technique labels beside these puzzles.
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Practice! X-Wing Sudoku
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