(;GM[1]FF[4]SZ[19]
GN[Pitfall 1]
PC[http://senseis.xmp.net/?GokyoShumyoSection1Problem47/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection1Problem47/Solution

Pitfall 1]
PL[W]

AB[na][nb][nc][oc][pc][qd][rd]
AW[ob][pb][rb][sb][qc]

;W[oa]C[W1]MN[1]
;B[qa]C[B2]MN[2]
;W[qb]C[W3]MN[3]
;B[ra]C[B4]MN[4]

;
)
