22 tests passing, and my solver still told you to click a mine

I wrote a minesweeper probability solver. You hand it a board, it hands back the probability that each unknown square is a mine, so that when logic runs out and you have to guess, you at least guess the cheapest square. It has 22 unit tests.

Source: [Dev.to](https://dev.to/dylanhuang/22-tests-passing-and-my-solver-still-told-you-to-click-a-mine-46d8)