(;GM[1]FF[4]SZ[19]
GN[White lives]
PC[https://senseis.xmp.net/?KyuExercise170/Solution]AP[GoWiki:2009]
DT[2023-02-21]
C[Diagram from https://senseis.xmp.net/?KyuExercise170/Solution

White lives]
PL[W]

AB[ck][dk][ek][al][bl][cl][fl][fm][cn][fn][co][fo][dp][ep][fp][dq][dr][ds]
AW[dl][el][am][bm][cm][em][en][do][eo][cp][cq][cr][cs]
CR[dl][el][em][en][do][eo]

;W[bo]C[W1]MN[1]
;B[dm]C[B2]MN[2]
;W[bn]C[W3]MN[3]
;B[dn]C[B4]MN[4]

;CR[dl][el][em][en][do][eo]
)
