JAT-2018: opposites
JAT-2018: (no) windows
JAT-2018: touché !
JAT-2018: metal and concrete
JAT-2018: concrete, metal and wood
JAT-2018: triangles aplenty
JAT-2018: below stairs
JAT-2018: shaping up
JAT-2018: Swiss pyramid 1/2
JAT-2018: chasm
JAT-2018: over and under
JAT-2018: cornered
JAT-2018: in a twist
JAT-2018: puzzle
JAT-2018: conundrum
JAT-2018: stepping up
JAT-2018: the broader picture
JAT-2018: looking up