(;
AB[eb][dc][dd][fc][ce][cf][cg][ee][bf]
AW[cb][cc][cd][db][ad][be][de]
PL[W]
C[What is Black's correct endgame sequence?

Source:
Endgame Technique, Kudo Norio 9P
Go World #27, pp. 48-49,  Spring 1982]
(;
B[af]
C[Even fairly strong players incorrectly proceed with the following sequence.];
W[ab];B[ae];W[bd]
LB[da:A][ea:B]
C[Now, because playing locally is gote, Black might not want to hane at A.

The correct way to calculate the corner is to assume Black B and White A, which gives White 6 points in the corner.

However, this sequence needlessly gives White extra profit.]
)
    (;
    B[ab]
    C[The proper approach is to make this placement, which is the vital point for both sides.];
    W[bb];B[af]
    C[Now Black descends.];
    W[ac];B[bd];W[aa]
    C[White has to answer here to Black's throw-in.];
    B[ae]
    LB[da:A][ea:B]
    C[This sequence is the best for both sides.

Later, you can assume White A and Black B, which means that White has only 3 points in the corner.  (The captured stones cancel each other.)]
    )
    (;
    W[ab]
    C[Note:  White going 1st often plays here.  The following sequence then occurs.];
    B[af];W[ae];B[ea];W[da]
    TR[ab]
    C[This result is a gain of 4 points over the preceding variation.

So White's marked play is worth 4 points in gote.]
    )
)

