(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[http://senseis.xmp.net/?BeginnerExercise185/Solution]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise185/Solution

Solution]
PL[B]

AB[np][op][qp][rp][mq][pq][mr][ms][ns][qs]
AW[nq][qq][rq][nr][pr][rr][os][rs]
CR[os]
LB[oq:a][qr:c][ps:b]

;B[or]C[B1]MN[1]

;CR[os]
LB[oq:a][qr:c][ps:b]
)
