(;GM[1]FF[4]SZ[19]
GN[Reference: If white tries the same approach like problem 1-74, then black can make life in the corner and the position is still Ko.]
PC[http://senseis.xmp.net/?GokyoShumyoSection3Problem79/Attempts]AP[GoWiki:2009]
DT[2018-10-16]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection3Problem79/Attempts

Reference: If white tries the same approach like problem 1-74, then black can make life in the corner and the position is still Ko.]
PL[W]

AB[da][cb][hb][dc][ic][dd][de][ee][he][ie][ff][gf]
AW[db][eb][gb][ec][gc][ed][gd][fe][ge]

;W[cc]C[W1]MN[1]
;B[bc]C[B2]MN[2]
;W[cd]C[W3]MN[3]
;B[ba]C[B4]MN[4]
;W[bd]C[W5]MN[5]
;B[ab]C[B6]MN[6]
;W[ea]C[W7]MN[7]
;B[ga]C[B8]MN[8]
;W[ca]C[W9]MN[9]

;
)
