(;GM[1]FF[4]SZ[19]
GN[White cannot be lax]
PC[http://senseis.xmp.net/?BeginnerExercise98/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise98/Solution

White cannot be lax]
PL[W]

AB[on][ko][lo][mp][np][kq][lq][mq][oq][kr][or][pr]
AW[ln][mo][no][oo][po][lp][op][nq][pq][lr][mr][nr]

;W[qq]C[W1]MN[1]
;B[qr]C[B2]MN[2]
;W[rr]C[W3]MN[3]
;B[ls]C[B4]MN[4]

;
)
