Hnaging mate in one was unfortunate for Bill. If he were my student, I would immdiately have him do 100 one move mate problems to increase his tactical vision.
Most of us improve simply by playing many games, accentuating that with study and training. Someone like Bill probably doesn't have the time for this, hence tactical puzzles are probably the best compromise.
I doubt Bill really gave a sht...PR stunt. Bill checkmated the game of life long time ago
