(;GM[1]FF[4]SZ[19]
GN[Lines on the board]
PC[https://senseis.xmp.net/?HowDiagramsWork]AP[GoWiki:2009]
DT[2020-01-30]
C[Diagram from https://senseis.xmp.net/?HowDiagramsWork

Lines on the board]
PL[B]

LN[aa:ca][ca:cc][cc:ac][ac:aa]


;LN[aa:ca][ca:cc][cc:ac][ac:aa]
)
