(;GM[1]FF[4]SZ[19]
GN[Seki]
PC[https://senseis.xmp.net/?GokyoSeimyoVolume3Problem31/Solution]AP[GoWiki:2009]
DT[2023-02-15]
C[Diagram from https://senseis.xmp.net/?GokyoSeimyoVolume3Problem31/Solution

Seki]
PL[B]

AB[rm][mn][on][sn][oo][qo][ro][mp][np][nq][oq][pr]
AW[so][lp][op][pp][qp][rp][sp][lq][mq][pq][nr][or]

;B[qr]C[B1]MN[1]
;W[rr]C[W2]MN[2]
;B[rs]C[B3]MN[3]
;W[rq]C[W4]MN[4]
;B[sr]C[B5]MN[5]

;
)
