(;GM[1]FF[4]SZ[19]
GN[Mistake]
PC[http://senseis.xmp.net/?KyuExercise75/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise75/Solution

Mistake]
PL[W]

AB[qm][mn][nn][pn][lo][qo][ro][lp][pp][lq][pq][lr][mr][pr]
AW[oo][po][mp][np][op][qp][mq][oq][nr][or]

;W[ps]C[W1]MN[1]
;B[rq]C[B2]MN[2]
;W[qr]C[W3]MN[3]
;B[qq]C[B4]MN[4]
;W[rr]C[W5]MN[5]
;B[sr]C[B6]MN[6]

;
)
