4/14 Talk about the game of Omok.

Omok is like the upgraded version of tic-tac-toe.
ex> Did you download the upgraded version of the apps on your phone?

You must line up five of your pieces in a row.
* in a row: 한 줄로
* line up: 한 줄로 세우다.
ex> The teacher lined up her students to go to lunch.

They can be done in any direction: vertically, horizontally or diagonally.
* diagonally: 대각선으로
ex> There are two lines crossing diagonally to form an "X."

The two opponents will go back and forth placing their stones on empty square corners.
* go back and forth: take turn, 번갈아가며 하다.

These days, Omok is enjoying even more popularity due to smartphones.
* enjoy even more popularity: 더 큰 인기를 누리다.

You can download to play whenever you want while out and about.
* be out and about: 밖에 나와 돌아다니다.
ex> My son is such a social butterfly that he's always out and about.

@ I want to leave a good impression on him.  그한테 좋은 인상을 남기고 싶어요.