Poor Choi Jeong: she was on course for another win vs a top man but one slightly greedy and thin move in early endgame and Chen Yaoye made a picnic ko inside her territory and the game reversed.

Ke Jie and Shin Jinseo won quickly as expected. Kyo Kagen lost. Iyama is doing well.

Result of round of 32;
Zhang Tao < Kim Jiseok
Tao Xinran > Cho Sonjin
Ke Jie > Lee Yeonggu
Xie Erhao > Zhao Chenyu
Chen Yaoye > Choi Jeong
Guo Xinyi < Seo Bongsoo
Liao Yuanhe > Yu Lijun
Gu Zihao > Heo Yongho
Huang Yunsong > Tanguy Lecalve
Cao Xiaoyang < Shin Minjoon
Li Qincheng > Hsu Chiayuan
Yang Dingxin > Byun Sangil
Dang Yifei < Park Junghwan
Tang Weixing > Iyama Yuuta
Gao Xing < Shin Jinseo
Han Yizhou < Kang Dongyun

Good to see Seo Bongsoo taking advantage of his draw and advance. The form almost all held in the first round; believe the only lower-rated player (by GoRatings) to win is Tang Weixing, who had been in a deep slump since November of last year, but this is Samsung Cup where he has always performed well.

Tang Weixing's winning of this game is so his 'muddy' style.

Pairing for round of 16;
Liao Yuanhe vs Huang Yunsong
Seo Bongsoo vs Gu Zihao
Ke Jie vs Tao Xinran
Chen Yaoye vs Shin Jinseo
Shin Minjoon vs Li Qincheng
Yang Dingxin vs Kim Jiseok
Park Junghwan vs Xie Erhao
Tang Weixing vs Kang Dongyun

Seo Bongsoo is 66 years old and probably the oldest player win a game in main tournament of majors.
He said AI helped him a lot.

Result of round of 16;
Liao Yuanhe defeated Huang Yunsong by resign.
Gu Zihao defeated Seo Bongsoo by resign.
Tao Xinran defeated Ke Jie by time.
Shin Jinseo defeated Chen Yaoye by resign.
Shin Minjoon defeated Li Qincheng by resign.
Yang Dingxin defeated Kim Jiseok by resign.
Park Junghwan defeated Xie Erhao by resign.
Tang Weixing defeated Kang Dongyun by resign.

I like the fact that Samsung Cup is going non-stop and will decide its champion within a week.

So 5 Chinese vs 3 Koreans? Yang Dingxin seems to be in fine form - he's up to 4th in the world rankings. If he continues to do well here, he might become the 4th player to break through 3600 line.

Pairing for round of 8;

Park Junghwan vs Tang Weixing
Tao Xinran vs Yang Dingxin
Shin Jinseo vs Liao Yuanhe
Shin Minjoon vs Gu Zihao

Tang murdered Park!

Edit: here's the game (FineArt variations from Fox). I thought LZ suggestion of f13 cut on move 72 was interesting, particularly given what happened later in the centre fighting. Even tohugh it allows black's f15 tesuji, white loses a little territory on top and lets black settle there but gets strong on the outside in exchange. If that had happened then Park's group which later died would have been in far less trouble as the m14 cut and trade which but strength in sente to prepare the kill would have been meaningless. I guess Park was happy to fix the bad aji in the top left and get sente, and LZ says he was still ahead, but LZ is very good at invading and sabaki in the shadow of that turtle thickness, whereas I think it may have been more prudent for Park to have played a bit more thickly and respectfully of that thickness to reduce chances for him to die later.

Result of round of 8;

Tang Weixing defeated Park Junghwan by resign.
Yang Dingxin defeated Tao Xinran by 0.5.
Liao Yuanhe defeated Shin Jinseo by resign.
Gu Zihao defeated Shin Minjoon by 1.5.

Tang was in such a poor form recently in domestic tournaments. But every time in Samsung cup he becomes 13-dan.

Yang Dingxin looking very dapper in that photo.

Pairing for semi final;

Tang Weixing vs Liao Yuanhe
Yang Dingxin vs Gu Zihao

Whoa! Chinese sweep... I didn't see that coming

Result of semi final;

Tang Weixing defeated Liao Yuanhe by resign.
Yang Dingxin defeated Gu Zihao by resign.

Final - 9/4, 9/5, 9/6
Tang Weixing vs Yang Dingxin

According to AhQGo (which pretty much matched Yike commentary) Gu Zihao was leading for a long time but the game turned when he failed to profit enough from harassing Yang's centre straggle.

First game of final is live now.

Tang black
https://home.yikeweiqi.com/#/live/room/22236/1/20426004

Tang won with his classic "counterattack when you make a mistake attacking his weak group" style.

Final 2nd game;

Yang Dingxin defeated Tang Weixing by resign.
Tied 1:1