Part-way through the section on bit-twiddling, I thought to myself "Oh I wonder if we could use a solver here". Lo and behold, I was pleasantly surprised to see

Part-way through the section on bit-twiddling, I thought to myself "Oh I wonder if we could use a solver here". Lo and behold, I was pleasantly surprised to see the author then take that exact approach. Love the attention to detail in this post!