(;GM[1]FF[4]AP[Drago:4.22.03]SZ[19]CA[UTF-8]AB[rr][qq][pq][pp][oo][no][mp]AW[rq][qp][ro][po][op][np][or][qo][sp]C[Black to play and capture the cutting stones]
(;B[oq]C[Black can try to push through between the white stones.];W[nq]
(;B[mq]
;W[nr]C[Black cannot do this else the corner gets in trouble.])
(;B[nr]C[So Black had better play this way...];W[mq];B[mr];W[lq];B[pr]
;W[mo]C[... but White captures the outside.]))
(;B[nr]C[This is the correct play that makes White short of liberties.]
(;W[oq];B[pr]
(;W[ps]C[White can struggle...];B[qr];W[mq]
;B[nq]C[... but Black easily captures.])
(;W[os]
(;B[ps];W[qs];B[qr];W[sr];B[rs])
(;B[ns]
(;W[qr];B[qs];W[ps];B[nq])
(;W[ps];B[qr];W[sr];B[nq]))))
(;W[pr];B[oq])
(;W[mr];B[nq])
(;W[nq];B[mq])))
