(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AB[sq][rr][qr][pr][pq][pp][po][pn][lr][lq][mq][lp][lo]AW[mr][nr][or][qq][rq][rp][qo][qn][qm][pm][om][nm][mm][mo][mp][op]C[Black play and save the corner]
(;B[mn]C[This fails for Black.];W[oo]C[White keeps all the stones linked with this play.])
(;B[nq]C[This is wrong too.];W[oq];B[np];W[oo];B[no];W[on])
(;B[oo]C[Though the shape point White can still link all the stones.];W[np];B[mn];W[nn])
(;B[np]C[This wedge is the tesuji to stop connection.]
(;W[oo]
(;B[no];W[on]
;B[oq]C[Black traps three and saves the corner.])
(;B[oq]C[This is wrong.];W[nq]))
(;W[nq]C[This does not help White.];B[no];W[oo];B[mn];W[on];B[oq]))
)
