Big Big Sudoku 2026: Tier 2 – Medium: Large print for adults, 2 grids/page. Solutions included. Sudoku Explorer rating 2.6–3.8 (MEDIUM). All puzzles verified, solvable with a single solution.
Big Big Sudoku 2026: Tier 3 – Hard: Large print for adults, 2 grids/page. Solutions included. Sudoku Explorer rating 3.6–4.9 (HARD). All puzzles verified, solvable with a single solution.