Math
Sudoku
Classic daily 9x9 Sudoku with four fresh difficulties every day, a notes mode, instant conflict highlighting, and per-difficulty timing.
Each date on DLE Directory highlights one daily puzzle worth trying. For Wednesday, January 28, 2026, we are introducing Sudoku — a math DLE that usually takes 3–10 min.
Classic daily 9x9 Sudoku with four fresh difficulties every day, a notes mode, instant conflict highlighting, and per-difficulty timing.
