You can't solve this problem. But don't be disappointed. It's Einstein's problem. Remember logical expressions well. And, find the answer. * Game features -You have to think about the number of all cases that can fit horizontally/vertically. -If there are many different cases, you need to establish a hypothesis and prove the hypothesis. -Scores compete with everyone in the world. You can know your world rank. * How to play -It is a game that ends by placing items that will fit horizontally/vertically. -Depending on the given problem, just touch the horizontal/vertical area and select an item. -All items cannot be used repeatedly, and must be used only once. -By selecting a problem, you can indicate what is not correct. -It ends when all items are placed correctly. Thank you.