(;GM[1]FF[4]SZ[19]
GN[another ko]
PC[https://senseis.xmp.net/?GokyoShumyoSection3Problem12/Solution]AP[GoWiki:2009]
DT[2023-01-01]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection3Problem12/Solution

another ko]
PL[W]

AB[ha][bb][fb][gb][ib][cc][dc][ec][jc]
AW[hb][bc][fc][gc][hc][lc][oc][ad][cd][dd][ed][jd][kd][be]
CR[ad]

;W[da]C[W1]MN[1]
;B[db]C[B2]MN[2]
;W[ea]C[W3]MN[3]
;B[ca]C[B4]MN[4]
;W[ba]C[W5]MN[5]
;B[aa]C[B6]MN[6]
;W[ab]C[W7]MN[7]

;CR[ad]
)
