1983 · 7th Kisei final
Cho Chikun from 0-3 to 4-3: a comeback made of four last chances
Fujisawa Shuko needed one win for a seventh straight Kisei. Cho won four in a row and game seven by 1.5 points. The useful drama begins at Black 143, where a leader gradually returns the initiative.
Cho Chikun (White) vs Fujisawa Shuko (Black) · 1983.03.16—03.17 · game seven · White won by 1.5 · series 4-3
Six-time champion versus four elimination games
Fujisawa had held every Kisei since the event began. Cho already held Meijin and Honinbo but lost the first three games; from game four onward, every win bought only another seat at the board.
After tying 3-3, Cho could become the holder of all three major titles. A final margin of 1.5 shows that the famous series comeback was no easy last game.
Character legends cannot explain Black 143
Fujisawa's flamboyance and Cho's total concentration make convenient portraits. Biographical commentary instead points to Black 143 and 149 after Fujisawa had led much of the game.
A series allows adjustment between games; a position allows only move order. TreeView translates willpower into exchanges, shape, and initiative.
Why Black 143 is a leader's invisible danger
The move looks safe but does not convert the lead into a demand White must answer. White gains time to repair shape and connect scattered chances.
The loss arrives in installments rather than one capture. Black 149 repeats the problem, so 143 is a beginning, not a magical losing move.
TreeView offers three ways to cash a lead
The board forks after White 142 and preserves Black 143. All alternatives share the same 10,000-visit root and precomputed continuations.
Watch initiative across several nodes. A leader often needs a forcing sequence more than the largest visible territory.
Four ways to manage an advantage
O15 drops Black from about 84.7% and +1.9 to 73.9% and +1.1: still ahead, but with a much narrower margin.
P17 receives 9,168 visits; P17, P16, P15, O15 keeps pressure and initiative.
O13 gets 354 visits and about 73.7%, a central solution without P17's forcing stability.
N18 gets only 200 visits and about 71.3%; it is an exploratory upper-side simplification, not an equal vote.
A comeback is many moments of not being finished
The 0-3 to 4-3 score is the shell; Cho's repeated ability to pose one more problem is the board-level story.
A lead cannot be stored as a number. It must be converted through initiative, shape, and a verifiable route to the end.