I found that I am really bad at playing chess. . . . . . . . .

First of all, losing chess is not necessarily related to IQ. Playing chess is called playing chess casually (playing chess without calculation), which can be avoided as long as you think carefully and then play chess, just like the secret in Orange is that "chess is artistic, but its meaning is quite subtle." You must concentrate, and then you will get it. It must be legal before it can be surpassed. Generally speaking, the overall situation is ever-changing and difficult to describe. …………"