Choi Cheolhan is number 2 in Korea (as of August, 2011), but his results against Chen Yaoye are no good, somehow.
Choi really likes fighting. His nickname is ‘venomous snake’.
Back when Lee Changho was almost invincible, Choi defeated him a lot with his endless fighting style. At that time he gained that nickname, but he once said he doesn’t care about such things in an interview.
Chen is also good at fighting. However, his style of play is thick and solid. He waits for his opponent’s invitation to battle. I wrote about Chen Yaoye as part of my Top 20 Go players of 2010 series.