Ratings
2013-03-31: 19st KOREA Othello Championships(Korea)
| OH Joungmok | 53-11 | CHO Yoon-Jeong |
| CHO Yoon-Jeong | 09-55 | HA Seungsup |
| GIM Dongsung | 51-13 | CHO Yoon-Jeong |
| CHO Yoon-Jeong | 09-55 | OH Joungmok |
| HA Seungsup | 48-16 | CHO Yoon-Jeong |
| CHO Yoon-Jeong | 14-50 | GIM Dongsung |