(;GM[1]FF[4]SZ[14:19]
GN[Solution 2: simpler ko]
PC[https://senseis.xmp.net/?XuanxuanQijingProblem220/Solution]AP[GoWiki:2009]
DT[2023-02-08]
C[Diagram from https://senseis.xmp.net/?XuanxuanQijingProblem220/Solution

Solution 2: simpler ko]
PL[W]

AB[lb][ic][lc][id][ld][ie][je][ke][le]
AW[mb][dc][fc][hc][mc][hd][md][he][me][hf][if][jf][kf][lf]

;W[la]C[W1]MN[1]
;B[ka]C[B2]MN[2]
;W[ja]C[W3]MN[3]
;B[jb]C[B4]MN[4]
;W[kb]C[W5]MN[5]
;B[kc]C[B6]MN[6]
;W[ib]C[W7]MN[7]

;
)
