I will tell you the 1-2-2-1 pattern of minesweeper game. It is similar to the 1-2-1 pattern I posted before. This pattern is also frequently used, so learning it can be a great help for recording. 1-2-2-1 pattern In the figure below, there are numbers 1-2-2-1 in a line. In this case, there are 2 mines in number 2. If there is at least one mine in number 1, 2 numbers cannot be made in a row. If you don't understand, the best thing to do is mark mines one by one and count the number of cases. Minesweeper 1-2-2-1 Pattern There is a mine at 2-2 when there is 1-2-2-1 in a line. 1-2-2-1 Application Now let's do the application. Focus on the number 1-2-2-2 in the figure below. This can be easily solved with the formula 1-2-2-1. The bottom two in 1-2-2-2 is actually one. Because I found a mine at the bottom. Minesweeper 1-2-2-1 Applic...