Clocking in at 39 minutes, who could imagine that “The Speed Cubers,” a documentary about a Rubik’s Cube championship, would compel? Yet that is exactly what Sue Kim achieves. Artfully switching between the two titans of the sport, handsome Feliks Zemdegs and autistic Max Park, Kim quickly gets to the nub of the skill and the contest, and then builds up suspense around the relationship between the pair. Unobtrusive, intelligent cinematography nails every scene, the various “talking head” interviewees are terrific, and the director’s control of pacing is exemplary. The final scenes carry considerable emotional heft. A fascinating subject accorded an exemplary treatment … recommended.
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