(;GM[1]FF[4]SZ[19]
GN[Failure: Ko]
PC[https://senseis.xmp.net/?IgoHatsuyoRonProblem112/Solution]AP[GoWiki:2009]
DT[2023-02-02]
C[Diagram from https://senseis.xmp.net/?IgoHatsuyoRonProblem112/Solution

Failure: Ko]
PL[B]

AB[lb][qb][rb][lc][pc][sc][md][pd][qd]
AW[kb][ob][kc][qc][rc][kd][rd][le][me][oe][qe][of][rf]

;B[pb]C[B1]MN[1]
;W[mb]C[W2]MN[2]
;B[mc]C[B3]MN[3]
;W[la]C[W4]MN[4]
;B[nb]C[B5]MN[5]
;W[na]C[W6]MN[6]

;
)
