This post is made for sharing the result of a closed tourney i've been conducting before the release of Stockfish 7, a kind of tourney i was not really willing to attempt for. Anyhow i could not resist anymore against my curiosity and thanks to one of the tablets standing free of load, i started such badly scheduled no sense.
* 8 different builds of 7 different versions, including Stockfish 6 which is supposed to be the weakest.
* Used the first 10 of the last 50 openings of TCEC-7 and each build played 20 games against all others, a total of 140 games per build.
* Ran on quad core RK3188 downclocked from 1.4 to 1.0 GHz to avoid overheating
* Time controls 180+2, way shorter than usual 900+2 of Rapidroid.
I was planning to go until all 50 openings are played, for a total of 700 games per build but the tourney became obsolete after Stockfish 7. Even though i stopped at 20% of the progress, below results are quite speaking, showing the progress achieved step by step.
The ratings are calculated according to latest Rapidroid rating of 121215 build by JA, anchored at 3325.
We will see soon how high Stockfish 7 (released with Droidfish 1.60) can climb in Rapidroid conditions. In any case, i don't expect 3367 ELO given that playing with other engines at longer time controls usually stretches the gaps.
click image to enlarge