(;GM[1]FF[4]SZ[19]
GN[Black tries the ko]
PC[http://senseis.xmp.net/?GokyoShumyoSection3Problem68/Attempts]AP[GoWiki:2009]
DT[2018-10-16]
C[Diagram from http://senseis.xmp.net/?GokyoShumyoSection3Problem68/Attempts

Black tries the ko]
PL[B]

AB[dn][co][fo][go][jo][hp][ip][cq][eq][jq][kq][br][cr][dr][jr]
AW[dp][ep][fp][dq][gq][iq][er][ir][ds]

;B[gs]C[B1]MN[1]
;W[hr]C[W2]MN[2]
;B[fr]C[B3]MN[3]
;W[fq]C[W4]MN[4]
;B[es]C[B5]MN[5]

;
)
