(;GM[1]FF[4]SZ[19]
GN[Ko defense]
PC[https://senseis.xmp.net/?JosekiRelatedLifeAndDeathExample6]AP[GoWiki:2009]
DT[2022-12-27]
C[Diagram from https://senseis.xmp.net/?JosekiRelatedLifeAndDeathExample6

Ko defense]
PL[W]

AB[ec][dd][cf]
AW[fc][fd]

;W[cc]C[W1]MN[1]
;B[dc]C[B2]MN[2]
;W[db]C[W3]MN[3]
;B[eb]C[B4]MN[4]
;W[bb]C[W5]MN[5]
;B[bd]C[B6]MN[6]
;W[bc]C[W7]MN[7]
;B[da]C[B8]MN[8]
;W[ca]C[W9]MN[9]

;
)
