(;GM[1]FF[4]SZ[19]
GN[Difficult joseki or trick sequence? (A3a)]
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? (A3a)]
PL[W]

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

;W[pe]C[W1]MN[1]
;B[sb]C[B2]MN[2]
;W[nf]C[W3]MN[3]
;B[mc]C[B4]MN[4]

;
)
