(;
AB[br][bq][cq][dr][cs][eq][fq][fp][eo][en][fn][ek][ck]
AW[dn][em][cm][cp][dp][ep][dq][er][fo][go]
PL[W]
C[White to play the best move sequence.

Source:
    Go the Natural Way!, Takemiya Masaki 9P
    American Go Journal, p. 38, Vol. 30, No. 2, 1996]
(;
W[fm]
C[Even a beginner can see that White can run out by simply pushing here, but ...];
B[gn]
C[... Black also runs out.  Now White's lower side suffers to let White's left side stones escape.  White must do a lot better.]
)
    (;
    W[gp]
    C[Crude technique.];
    B[gq]
    C[Black can resist here to leave defects in White's position.];
    W[hq];B[fr];W[gr];B[es]
    C[White can force on the outside with this sequence, but ...];
    W[gl];B[gn]
    C[... Black can split White into 2 weak groups.]
    )
    (;
    W[hp]
    TR[en][fq]
    C[The vital point.  White creates threats against both marked groups.]
    (;
    B[fr]
    C[Black can save the bottom stones, but ...];
    W[gl]
    TR[hp]
    C[... with the help of the marked stone, White can net the 3 center stones.]
    )
        (;
        B[fm]
        C[Black can save the center stones, but ...];
        W[fr]
        C[... now White has a famous tesuji sequence against the lower stones.

Can you see the moves and the result?];
        B[gq];W[gr];B[hq];W[iq];B[hr];W[ir]
        C[White wins the semeai by one move.]
        )
    )
)

