(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[7.50]PW[Tim Hunt]PB[Daniel Chun Yang]AB[cp][dc][do][fp][gp][hp][jd][cf][dk][dj][cj][bk][bl]AW[pp][eq][pd][gq][hq][iq][ci][cl][ck][di][bj][bi]
(;W[cm]C[This does not trap the black edge stones and there is no attack above.];B[bm]
(;W[bn];B[cn])
(;W[cn];B[bn]))
(;W[dl]C[This fails too.];B[bm]C[Black can play here and the ladders on the other stones are in Balck's favour.]
(;W[ek];B[ej];W[fj];B[ei];W[eh];B[fi];W[gi];B[fh];W[fg];B[gh]
;W[hh];B[gg];W[gf];B[hg];W[ig];B[hf];W[he];B[if];W[jf];B[ie])
(;W[ej];B[ek];W[fk];B[el];W[em];B[fl];W[gl];B[fm];W[fn];B[gm]
;W[hm];B[gn];W[go];B[hn];W[in];B[ho]))
(;W[bm]C[This is the correct first move.];B[cm];W[dl];B[bn];W[dm]
(;B[cn]
;W[fj]C[This is correct attacking shape.];B[ek]
;W[fl]C[This net traps the four black stones.])
(;B[el]C[If this instead of connecting, 
Black collapses]
(;W[am])
(;W[cn];B[am];W[cm];B[bo];W[ak]))))
