CSS doesn't have built in memory, so how can a CSS only minesweeper game remember every click that you do?
A pure HTML/CSS 2.1 MineSweeper, by Timo Huovinen
Back in 2010 after a small chat with Román Cortés about CSS memory, a solution to CSS memory managment was born.
Later I went home and completed the minesweeper that I was working on for a couple of weeks