(;GM[1]FF[4]SZ[19:2]
GN[Mirroring a triangle (or L shape) is a bad idea]
PC[http://senseis.xmp.net/?NarrowBoards]AP[GoWiki:2009]
DT[2012-05-31]
C[Diagram from http://senseis.xmp.net/?NarrowBoards

Mirroring a triangle (or L shape) is a bad idea]
PL[B]

AB[ha][ia][ja][ka]
AW[ib][jb][kb][lb]

;B[hb]C[B1]MN[1]
;W[la]C[W2]MN[2]
;B[ma]C[B3]MN[3]

;
)
