Series Spotlight9 series
Diagonal Sudoku Collection
Add a new twist to your solving routine. In these grids, the two main diagonals must also contain unique numbers 1-9. It's a satisfying layer of complexity that forces you to think in new directions.
🧩 Curated collection
Hand-picked sets for every solver.
✨ Trusted by solvers
High-quality grids with crisp layout + fonts.
🧠 Stress Relief
Focus your mind and find flow with logic puzzles that calm anxiety.
📅 Updated regularly
New puzzle books land each month.
Loading series…
