(;GM[1]FF[4]SZ[19]
GN[Trapped]
PC[http://senseis.xmp.net/?KyuExercise6/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?KyuExercise6/Solution

Trapped]
PL[W]

AB[no][oo][mp][pp][mq][oq][pq][nr][or][qr][rs]
AW[mn][nn][on][lo][po][qo][lp][qp][lq][qq][lr][mr][rr][sr][ps]
CR[qr]

;W[np]C[W1]MN[1]
;B[mo]C[B2]MN[2]
;W[pr]C[W3]MN[3]
;B[os]C[B4]MN[4]

;CR[qr]
)
