(;GM[1]FF[4]SZ[19]
GN[Black to kill]
PC[https://senseis.xmp.net/?GokyoShumyoSection2Problem21]AP[GoWiki:2009]
DT[2023-01-05]
C[Diagram from https://senseis.xmp.net/?GokyoShumyoSection2Problem21

Black to kill]
PL[B]

AB[gb][gc][bd][cd][dd][ed][fd][bf]
AW[eb][bc][cc][ec][ad]


;
)
