(;
AB[ib][kb][pb][qb][ic][jc][lc][mc][nc][oc]
AW[ra][lb][rb][kc][pc][qc][kd][ld][md][nd][od]
C[White plays.

Source:
    Problem #33 from the yose volume of Gokyo Seimyo, a nearly 200 year old problem set.];
W[ka]
C[The 1st move is obvious.];
B[jb]
(;
W[nb]
C[This funny looking move from Gokyo Seimyo works well here.]
(;
B[mb];W[ob];B[ma];W[pa]
C[White ends in gote, but captures 2 stones.];
W[qa]
C[However, note that after Black plays elsewhere, White's capture here is sente.];
B[la];W[na];B[ja]
C[So White forces Black to lose a couple more points by forcing the capture of the 2 White stones.]
)
    (;
    B[ob]
    C[Too greedy.];
    W[mb]
    C[And Black loses all the stone on the right.]
    )
)
    (;
    W[mb]
    C[Depending on the rest of the board, this move may not be bad.];
    B[nb]
    C[Black has to block.];
    W[na]
    C[And White has the following forcing sequence.];
    B[ob];W[qa];B[ma]
    C[The only move.];
    W[pa];B[la];W[oa];B[lb]
    C[White is 8 points worse than in the main line, but White keeps sente.]
    )
)

