She was raised as part of a prodigy-breeding psychological experiment, took on the chess patriarchy and beat her idol Garry Kasparov. So why isn’t there more depth to this documentary?Judit Polgár won her first chess tournament in 1981 when, at the age of six, she marmalised a string of middle-aged Hungarians and toddled off with a swanky Boris Diplomat Bd-1 Electronic Chess Computer. “I was a killer,” says the amiable 49-year-old in Netflix documentary Queen of Chess. “I wanted to kill my opponents. I would sacrifice everything to get checkmate.” Archive footage captures the bloody aftermath of Polgár’s inaugural victory; a roomful of solemnly jumpered victims looking on, dazed and ashen-jowled, as the vanquishing Hungarian scowls at photographers from beneath a bowl cut that could confidently be described as “ferocious”. The triumph put paid (at least temporarily) to Polgár’s painful shyness, making her feel “exceptionally powerful. After this, it was so obvious for me that I’m going...