2000 · 43rd Korean Kuksu decider
Rui Naiwei ties two dragons after defeating Cho Hunhyun
Rui became the first woman and first foreign player to win Korea's Kuksu title. The harder board story begins when White 60 tenukis and Black attacks two groups not by chasing one to death, but by making each group's escape burden the other.
Rui Naiwei (Black) vs Cho Hunhyun (White) · 2000.02.21 · deciding game · Black won by resignation · series 2-1
Already a 9-dan, long without a stable home circuit
Rui became the first female 9-dan in 1988 and later entered the Korean circuit in 1999. To reach the Kuksu title match she defeated Lee Changho in the challenger phase, then faced Cho.
This was not an isolated upset. It was the visible result of an elite player finding access to a top title system after years of geographic and institutional limits.
Beat Lee, then Cho; headlines still said only woman
The challenger path and three-game final establish the level before any identity record is mentioned.
White 60 takes a large point while accepting pressure on two groups; modern search calls it correct. Rui's achievement is turning even the best tenuki into a fight neither group can settle comfortably.
White 60 is best, yet the leaning attack makes two rescues conflict
Chasing one group directly can drive it toward its neighbor and help both connect. Strong attack gains on one side while pressing the other.
KataGo has Black about 63.3% and +1.2 before R2, then 63.4% and +1.3 afterward. White loses essentially nothing; the classic attack does not require an invented losing move.
TreeView turns a double attack into verifiable order
After Black 59, the played R2 receives 9,720 visits as the overwhelming first choice, so it appears once as the historical branch. Watch the distant dragon as local thickness changes.
A better line may create eyes, connection, or a forcing tempo. The PV shows which mechanism, not a promise to kill.
Three playable escape strategies for White
R2 gets 9,720 visits; after B5, B4, C5, C4, D11, and E11, White knowingly accepts attack for the largest value.
B5 gets 144 visits but raises Black to about 71.8% and +2.4: local safety is not whole-board efficiency.
R3 gets only 33 visits and about 72.7% for Black. One-line distance from R2 hides a large tactical difference.
The record is on the trophy; strength is in move order
Rui broke gender and nationality records. Equal treatment means giving her Go the same technical depth as any male champion's classic.
The lesson is restraint: attack two weak groups so every escape makes the other heavier. The TreeView lets that control be replayed.