(;GM[1]FF[4]SZ[19]
GN[Example 2: closed corridor of length 3]
PC[https://senseis.xmp.net/?Corridor]AP[GoWiki:2009]
DT[2019-12-22]
C[Diagram from https://senseis.xmp.net/?Corridor

Example 2: closed corridor of length 3]
PL[B]

AB[gi][hi][ii][ji][gj][gk][hk][ik][jk]
AW[ki][kj][kk]
LB[jj:a]


;LB[jj:a]
)
