> 4 core Skylake (Mac 2016) would be well beyond human capabilities Not if the computer's time limit is set at 15 microseconds. It's not a question of whether

> 4 core Skylake (Mac 2016) would be well beyond human capabilities Not if the computer's time limit is set at 15 microseconds. It's not a question of whether the computers have "enough power"; just whether they are more powerful now than they were previously. And yes, obviously that's a very sloppy and error-prone way to implement a difficulty control.