(;GM[1]FF[4]SZ[19]
GN[Pitfall]
PC[http://senseis.xmp.net/?BeginnerExercise11/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise11/Solution

Pitfall]
PL[W]

AB[fq][gq][hq][iq][jq][kq][lq][mq][nq][fr][nr][gs][js][ms]
AW[gr][hr][ir][jr][kr][lr][mr][hs][ls]

;W[fs]C[W1]MN[1]
;B[es]C[B2]MN[2]
;W[er]C[W3]MN[3]
;B[ds]C[B4]MN[4]
;W[dr]C[W5]MN[5]
;B[cs]C[B6]MN[6]
;W[br]C[W7]MN[7]

;
)
