(;GM[1]FF[4]SZ[19]
GN[Black should have peeped first]
PC[http://senseis.xmp.net/?BeginnerExercise32/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise32/Solution

Black should have peeped first]
PL[B]

AB[ra][kb][mb][pb][qb][rb][mc][pc][rc][md][me][re][mf]
AW[ma][nb][nc][qc][sc][nd][pd][qd][rd][ne][qe][rf][qg]

;B[sb]C[B1]MN[1]
;W[pa]C[W2]MN[2]
;B[oa]C[B3]MN[3]
;W[ob]C[W4]MN[4]

;
)
