This site makes Minesweeper boards that can be solved without guessing. Every board is checked to be solvable by logic before it reaches the screen, and only the ones that pass are used.
Why bother
The most common complaint about Minesweeper is the 50/50 at the end. That is a coin flip, not skill.
Scattering mines at random and checking the result over ten thousand times, twenty-four expert boards out of twenty-five needed a guess somewhere. So boards are generated, checked and thrown away until one passes. Even at expert that takes about two milliseconds.
Where the numbers come from
Board sizes and mine counts come from the ranking rules of Authoritative Minesweeper. Only Beginner differs: the rules use 8×8, but the board people know today is the 9×9 that Windows XP introduced.
The 24px floor on square size is the minimum target size in WCAG 2.2.
What this site does not do
There are no accounts and no leaderboards. The site serves static files only, so there is nowhere to collect anyone else's times from. Nothing is claimed that is not there.
A contact address will go up once the domain is settled.