The test is your eyesight. In a limited time, as long as you find out all the same patterns that can be connected, two in pairs. Every time you find a pair, they will automatically disappear. As long as all the patterns are eliminated, you can win. The so-called ability to connect means that whether horizontal or vertical, the connection from one pattern to another cannot exceed two bends, in which the connection cannot pass through the pattern that has not been erased.