(;GM[1]FF[4]SZ[19]
GN[Solution]
PC[https://senseis.xmp.net/?XuanxuanQijingProblem242/Solution]AP[GoWiki:2009]
DT[2023-11-15]
C[Diagram from https://senseis.xmp.net/?XuanxuanQijingProblem242/Solution

Solution]
PL[B]

AB[ok][pk][ol][om][qm][pn][po][pp][pq][pr][rr]
AW[qj][qk][pl][ql][pm][nn][on][qn][qo][np][rp][nr][or]

;B[rq]C[B1]MN[1]

;
)
