sDoku

무엇이 다른가

One puzzle. Every reader.
The same daily grid for everyone in the world, with the difficulty following the week: a gentle Monday, a fiendish Friday, the diabolical Sunday Special.
A proper solving kit.
Pencil marks written in the margins, cell-first or digit-first entry, and wrong entries circled in red ink as they happen. The editor will help if asked, and it goes on the record.
File your times, or don't.
Take a byline and the league tables rank your clean solves, fastest first. Filing costs nothing and reading the tables is free for everyone. Ignore them entirely and the paper never mentions it.
Ink on paper, not plastic.
A serif masthead, four paper stocks, and a rubber SOLVED stamp when the page falls. No ads between puzzles, no third-party trackers, and the daily edition needs no account at all.