(;GM[1]FF[4]SZ[19]
GN[Alternative Solution: simpler ko]
PC[https://senseis.xmp.net/?XuanxuanQijingProblem71/Solution]AP[GoWiki:2009]
DT[2023-02-07]
C[Diagram from https://senseis.xmp.net/?XuanxuanQijingProblem71/Solution

Alternative Solution: simpler ko]
PL[B]

AB[cf][bg][ch][ci][dj][dk][el][em][an][en][bo][co][do][eo][dq][dr]
AW[bh][bi][cj][ck][dl][bm][dm][cn][dn][cr]

;B[ak]C[B1]MN[1]
;W[bl]C[W2]MN[2]
;B[bj]C[B3]MN[3]
;W[bk]C[W4]MN[4]
;B[ai]C[B5]MN[5]

;
)
