I tried that. It learns what you're doing pretty quickly.
I was doing better by just trying to continually break whatever pattern I had fallen into, and occasionally throwing in some long predictable patterns (i.e. all the same key) to simulate the low chance of a long predictable string occurring. That had me down in the ~.4 range for a while. (Edit: Down to 0.23529 this try)
I was doing better by just trying to continually break whatever pattern I had fallen into, and occasionally throwing in some long predictable patterns (i.e. all the same key) to simulate the low chance of a long predictable string occurring. That had me down in the ~.4 range for a while. (Edit: Down to 0.23529 this try)