What is the hardest board game in the world?

Well, that's quite a subjective question! But if we're looking for a board game that's widely considered to be challenging, perhaps we could consider "Go". Go is a strategic board game that's been played for thousands of years, and it's known for its complexity and depth. The game board is made up of a grid of intersecting lines, and players take turns placing stones on the intersections. The goal is to surround more territory than your opponent, but the strategies and tactics involved in achieving this can be incredibly intricate and difficult to master. So, while there may be other board games that are also very challenging, "Go" is certainly one that's widely regarded as being among the hardest in the world.