(;GM[1]FF[4]SZ[19]
GN[Black to play]
PC[https://senseis.xmp.net/?KyuExercise140/Solution]AP[GoWiki:2009]
DT[2023-02-20]
C[Diagram from https://senseis.xmp.net/?KyuExercise140/Solution

Black to play]
PL[B]

AB[rq][sq][nr][or][sr]
AW[po][op][qp][rp][sp][mq][nq][mr][ms]
LB[ns:a][rs:b]

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

;LB[ns:a][rs:b]
)
