Wikipedia
Jul-Gonu (줄 고누 in Korean) is a two-player abstract strategy board game from Korea. It is one of many Gonu games. The game has a relatively small board (4 x 4 square board), and yet offers a challenge at different levels. The game could be played on a larger board, however, it tends to be tiresome. Jul means "lines", and the lines of the board are often drawn on the ground. The game is also referred to as "Ne-Jul-Gonu" , i.e. "Four Lines Gonu", referring to the four lines in each direction.
The game is related to Hasami shogi, Dai hasami shogi, Mak-yek, Apit-Sodok, Ming Mang, Gundru, Seega, Ludus latrunculorum, and Petteia. It may be distantly related to Reversi, Othello, Wei-chi, Baduk, and Go, Awithlaknakwe, and Bizingo as all of these games exhibit custodian capture or some form of it (as in the case of Wei-chi, Baduk, and Go). There are many other games that utilize custodian capture but have very little resemblance to Jul-Gonu such as the Tafl games and Agon.