The OpenAI project notched up a victory in online videogame Dota 2, pummeling the world’s best human player at The International – Dota’s global championship, with a $24m prize pool. Backer Elon Musk was quick to sing the praises of the OpenAI bot, declaring Dota 2 “vastly more complex than traditional board games likes chess and Go,” the latter being the game that Alphabet’s DeepMind made headlines in – but the victory wasn’t as one-sided as the PR makes it sound. It comes in the same week that rival AI evangelist DeepMind announced a similar project using the StarCraft 2 videogame (see separate article), as AI developers turn to videogames as a way to train their machine-learning systems in complex…