Where to Find Printable Triple Sudoku Puzzles (Samurai / Gattai-3)

Triple Sudoku (three overlapping 9×9 grids, sharing 3×3 boxes) — also called Samurai Sudoku or Gattai-3.

Best Free Online Sources

• Krazydad.com – Generator: choose size (3, 5, 8 grid), difficulty, format (PDF/HTML). Best for customization.
• Sudoku.com – "Samurai" section; printable PDFs, 4 difficulties.
• Puzzle Baron (puzzlebaron.com) – Daily Samurai; archive; print-friendly.
• The Guardian – Weekend Samurai; high-quality PDFs.
• Sudoku.org.uk – "Samurai Su Doku" archive.
• Printable-Sudoku-Puzzles.com – Dedicated Samurai page.

Physical Books

• The Big Book of Samurai Sudoku (various authors)
• Will Shortz Presents Samurai Sudoku
• Penny Press / Dell magazines – often include Samurai in variety issues.

Search Tips

• Keywords: "printable Samurai Sudoku," "Gattai-3 PDF," "triple Sudoku printable".
• Specify difficulty: "easy Samurai," "hard Samurai".
• For bulk: "Samurai Sudoku book PDF" (check copyright).

Creating Your Own

• Krazydad generator (above).
• Sudoku software: HoDoKu (free, open-source), Sudoku Generator (Android), QQwing (CLI).
• Python: pip install sudoku-generator → customize overlap.

Pro tip: Samurai shares 4 corner boxes between adjacent grids. Solve overlaps first—they constrain multiple grids simultaneously.