Many of the bots are just inconsistent in the quality of there play.
Sometimes Nelson hangs Queens like a fool on move five, sometimes he sets up a poisoned piece, and taking it blunders into a forced mate in four (This has actually happened to me)
It is merely your own increase in skill combined with the bots being bots and playing weird moves.
They see tactics perfectly, but if you don’t give them chances for tactics they fumble about in their ineptitude.
It isn’t like playing with a human, that is for certain.
So one of the ways I test my improvement is by trying to beat all of the bots. So when my rapid rating was around 900-1000, I couldn't beat a 1400 bot no matter how much I tried, then when my rating increased to 1100-1200 I've beat all 6 of the advanced 1400 and 1500 bots. Now my live rapid rating is 1300-1350 and I've finally beat all three 1600 bots, and let me tell you, it didn't feel all that difficult. And it feels great, but I can't rid myself of one thought... did I really improve that much, or did computer bots adapt to my rating and gave me the victory to just keep me paying for premium on the site? After all this would be a classic capitalist move.
Don't get me wrong, I've clearly improved, sometimes by 100 rapid points a week (I play 8-10 games a day), but it's just a little suspicious that about a week ago I tried to beat these 1600 bots 20 or 30 times and legit just couldn't, not a single time. And this week I beat all three in about 5 tries total.
Thank you for your thoughts!