Eighties nostalgia has never been so deeply… odd. The first oddness comes in how mundane — in a dryly humorous way — Computer Chess’s evocation of the early 1980s is: shot in black-and-white with video equipment from the era (or a remarkable simulation of such), it positively reeks of pre-YouTube visual geekery. But the powerful — and wonderfully weird — nerdery is in the story: in a depressing cheap hotel, small bands of programmers from various universities and corporations haul in their “portable” computers for their annual weekend adventure of putting their code to the test in games of chess. And this year? “We have a lady who’s competing,” announces the (male) host to (all male minus one) crowd for the mockumentary camera. They also have a couples’ encounter group vying for space in their meeting room, and touchy-feely-sexy truly does not snuggle up well with debates about AI and all-night debugging sessions. But just when you think that writer-director Andrew Bujalski and his scarily retro-accurate cast — shoutouts to Patrick Riester as the shy Peter (who is, however, unwittingly canny in engaging with the alien female), and Myles Paige as the desperately unsuave Papageorge — have gotten about as preternaturally ordinary in their re-creation of the era as they can, up pops a surreal, almost horrifying touch here and there… perhaps to remind us that this is not, in fact, found footage from 1983. And yet, the scariest thing of all could be how dead-on this all is, right down to the fact that awkward young men in ill-fitting polyester gave birth to the technological world around us today. And that mysterious visitor who has crashed the late-night rap session and is probing these guys for their ideas on artificial intelligence… is he from the Pentagon?