(;GM[1]FF[4]SZ[19]
GN[Difficult joseki or trick sequence? (A1)]
PC[http://senseis.xmp.net/?BQM30]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BQM30

Difficult joseki or trick sequence? (A1)]
PL[B]

AB[pa][ob][oc][rc][dd][pd][qd][ne][oe][jj][pj][dp][pp]
AW[pb][qb][rb][pc][qc][nd][od][me][qf]

;B[rd]C[B1]MN[1]
;W[nc]C[W2]MN[2]
;B[pf]C[B3]MN[3]
;W[ld]C[W4]MN[4]

;
)
