Click below to download a PDF version of Higher Sudoku samples, tips, and instructions
Higher Sudoku instructions and tips
Medium difficulty Higher Sudoku sample
Random Block Higher Sudoku sample
Plus One Higher Sudoku sample
Two-Unit Higher Sudoku sample

Click below to download a PDF version of O’Ekaki samples, tips, and instructions
O'Ekaki instructions and tips
Introductory-level O'Ekaki sample