(;GM[1]FF[4]SZ[19]
GN[Black to move]
PC[https://senseis.xmp.net/?GokyoSeimyoVolume3Problem11/Solution]AP[GoWiki:2009]
DT[2023-02-14]
C[Diagram from https://senseis.xmp.net/?GokyoSeimyoVolume3Problem11/Solution

Black to move]
PL[B]

AB[pl][ql][pm][pn][oo][pp][rp][pq][qq][or][qr][ps]
AW[qj][qk][rl][qm][qn][po][qo][qp][rq][rr][qs][rs]

;B[rm]C[B1]MN[1]
;W[rn]C[W2]MN[2]
;B[sq]C[B3]MN[3]

;
)
