(;GM[1]FF[4]SZ[19]
GN[White to play and connect underneath - II (Ko, best for black?)]
PC[http://senseis.xmp.net/?GokyoShumyoSection6Problem21/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection6Problem21/Attempts

White to play and connect underneath - II (Ko, best for black?)]
PL[W]

AB[fb][ec][gc][jc][de][fe][he][ie][ef][gf]
AW[db][hb][dc][hc][dd][ed][hd][ee][ge][cf]
SQ[ec]
LB[gb:a]

;W[fa]C[W1]MN[1]
;B[ea]C[B2]MN[2]
;W[eb]C[W3]MN[3]
;B[ga]C[B4]MN[4]
;W[fc]C[W5]MN[5]
;B[fd]C[B6]MN[6]
;W[gd]C[W7]MN[7]

;SQ[ec]
LB[gb:a]
)
