(;GM[1]FF[4]SZ[19:13]
GN[on a 13x13 board]
PC[https://senseis.xmp.net/?BQM598]AP[GoWiki:2009]
DT[2019-10-23]
C[Diagram from https://senseis.xmp.net/?BQM598

on a 13x13 board]
PL[B]

AB[rb][rc][qd][rd][pe][qe][mf][nf][of][qf][qi][nj][qj][pk]
AW[qb][nc][qc][od][pd][oe][pf][ng][pg][rg][nh][ph][qh][pi]
CR[rg]
SQ[nf]

;B[rf]C[B1]MN[1]
;W[se]C[W2]MN[2]
;B[sf]C[B3]MN[3]
;W[ra]C[W4]MN[4]

;CR[rg]
SQ[nf]
)
