I believe one of my Selayar females was the smartest retic i have ever owned. She understood tap training in about 2 days, was incredibly hard to trick about which window you were going to slide open (she'd come rushing out, Álways) She would also push open up the glass sliders herself, if you did not lock them. And once when she was cruising around the snake room while i cleaned (Someone else watched her) she crawled over to the door and crawled up the door handle causing the door to open. Put her back inside, close the door again.. Within a minute she had found the door handle again! we ended up locking the door
Also trying to trick any of my snakes about which side the window is going to open, was harder with retics.. Have to think of something else every now and again, some of them won't be fooled by the same trick too often. My boa's on the other hand, usually did not seem to see through the simple
'hand on one window, slide open the other' trick. Maybe they just cared less, maybe they really are less intelligent.