(;GM[1]FF[4]SZ[19]
GN[Symmetry]
PC[http://senseis.xmp.net/?BeginnerExercise129/Attempts]AP[GoWiki:2009]
DT[2009-04-22]
C[Diagram from http://senseis.xmp.net/?BeginnerExercise129/Attempts

Symmetry]
PL[B]

AB[oo][po][qo][ro][op][oq][or][pr][ps]
AW[pp][qp][rp][pq][rq][qr]
LB[sq:a][qs:c][ss:b]

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

;LB[sq:a][qs:c][ss:b]
)
