(;GM[1]FF[4]SZ[19]
GN[White captures two stones at least]
PC[https://senseis.xmp.net/?GokyoShumyoSection5Problem40/Solution]AP[GoWiki:2009]
DT[2022-12-27]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection5Problem40/Solution

White captures two stones at least]
PL[W]

AB[ha][eb][gb][ib][cc][ec][gc][ic][kc][cd][dd][fd][gd][jd][kd]
AW[db][hb][dc][fc][hc][jc][ed][hd][id][ee][fe][ge][hf]

;W[jb]C[W1]MN[1]
;B[ia]C[B2]MN[2]
;W[ea]C[W3]MN[3]
;B[fb]C[B4]MN[4]
;W[ga]C[W5]MN[5]
;B[fa]C[B6]MN[6]
;W[ja]C[W7]MN[7]

;
)
