@AmericanUnderdog
About 20% of positions, as I said in the previous post. And vice versa about 50%. But actually winning with the queen probably won't happen 50% of the time. Try winning with the queen against the Syzygy tablebase from this winning position.
Or just against an engine via the magnifying glass.
If you fail against the engine, don't be downhearted. So does the engine.
Sometimes 3 minor pieces > queen in the endgame.