Can I still check mistakes?
Yes. Error checking is optional and can be turned on only when the player wants help.
No Timer
No Timer Large Sudoku
No timer is a design choice. It keeps the puzzle focused on steady solving rather than speed, streaks, or pressure.
Why no timer matters
A timer can turn a quiet puzzle into a speed test. Large Sudoku keeps checking optional and leaves the pace to the player.
This is especially important for players using tablets, larger browser zoom, or printed sheets.
Search intent to support
No-timer pages should connect directly to the product difference. They are not filler pages; they explain one of the most important reasons older players may prefer this site.
Practical Questions
Will the site add leaderboards later?
Leaderboards do not fit the senior-first promise and should not be part of the default experience.