Here is another piece of evidence/also a trend.
It it well known that the strongest chess engines [other than Alpha Zero which appears to be strongest of them all by a good margin] by themselves are not playing the strongest chess. The strongest chess is played by these chess engines with a strong human player guiding.
Let me explain as this is in regard to correspondence chess which used to be my speciality... When I last played correspondence chess, chess computers were not used. This was because chess computers were not as strong as the players in the Final Round of the USA Correspondence Chess Championship. For example in the 14 games i played there was only 1 draw!
After that [except for some exhibition matches] i gave up playing correspondence chess. Why? Because i did not wish to compete in the new situation. I was not good with computers. I did not even know how to use a data base! I did not know how to research games of my opponents etc etc.
After the 7th US Correspondence Championship there were more and more games ending in a draw. Also for the winners, there were more and more draws.
This continued. This trend continued. The other day a grandmaster friend of mine showed me a tournament he won. This was a tournament with chess engines helped by a human. This was a correspondence chess tournament.
He won the tournament [really a tie for first] with a score of 12 draws and 2 wins and no losses!! There were a bunch of players who scored 14 draws with no losses or wins! And the worse result [from looking at the crosstable] was 12 draws and 2 losses!
So this trend is a very good indication that when the strength of the chess players combined with a chess engine becomes stronger--there are more and more draws.
[by the way i am not disparaging the new breed of correspondence players. Most of the very top players were already near the top when i was playing. They have skills i did not have and do not have.
and [this is important] their games are very high quality--even higher than the games of the best super GMs today]
by the way the recent game where Black played Rg8!? was not really something new--it was new to the over-the-board players--but had been seen more than once in correspondence play!
For those who play correspondence chess through chess.com of course chess engines are not allowed...


Here is another piece of evidence. Over the years as the best chess engines have gotten stronger--there have been more and more draws.
Not at all. Alpha Zero vs. Stockfish and the most recent TCEC championships both run counter to your argument.
I said it is a general trend over the years. If one chess engine is much stronger than another chess engine--then the stronger chess engine/machine/whatever you want to call it--will sometimes win.
However when chess enginess are closely matched there are more and more draws.
Yes, those two things you mentioned may run counter to my argument--that is why i said "over the years".
Well, it's a 2-3 year trend that there are less and less draws among the most evenly matched engines, Stockfish, Komodo, and Houdini...so that is actually the current trend. Your data is obsolete at this point, much like saying "over the decades, computers vs. humans, humans have come out on top more years then they have lost". Irrelevant.
And in any case, as they say in the stock market: "past performance is no guarantee of future returns"