But that doesn't actually separate the players from their time. Opening theory and endgame knowledge is developed with computers now, and humans use and learn f

But that doesn't actually separate the players from their time. Opening theory and endgame knowledge is developed with computers now, and humans use and learn from them. Move accuracy for thousands and thousands of GMs and IMs will easily be higher than Kasparov in peak form back in his heyday. But Kasparov came up with those moves, learning only from lesser minds.