Minefield is a classic Minesweeper clone that has an automatic difficulty adjustment feature that adapts to your skill level. 

The rules are simple: click on a tile to reveal what's underneath. If it's a mine, you lose. If it's a number, it tells you how many mines are adjacent to that tile. If it's blank, it means there are no mines nearby and the surrounding tiles are automatically revealed. You can also right-click on a tile to mark it as a mine or as uncertain. The goal is to clear all the tiles that don't have mines.