Hard to tell really.Leo wrote: ↑Sun Apr 07, 2019 3:19 pmmwyoung wrote: ↑Sun Apr 07, 2019 8:25 amThis is a testament to how really good Stockfish plays. With such obvious handicaps.corres wrote: ↑Sun Apr 07, 2019 7:59 amDuring the match they use for AB engines a server with 90 threads (HT = on) CPUs clock frequency 2.7 GHz and for NN engines 4xRTX 2080 Ti and a server with 36 physical cores (HT = off).
The main issues for AB engines the short TC (5 min + 2sec) and they no use opening book.
It would be a wonder if Stockfish can win the race.
Obviously it is not the aim of the organizing.
And when you split AB engine's work load 90 times to 90 threads. You are causing major overhead to the AB engine's real speed on this hardware. But it will look good to the public. When they see 90 CPU's, and huge NPS counts. And again this hardware is no match for 4x RTX 2080ti.
Was this done due to ignorance, or something else.
It looks to me the AB engines were setup to fail by the organizers.
You make an interesting point about AB engines being split to much. How many cores do you recommend for optimal performance for a AB engine?
But it's plenty evident in some benchmarks.
https://sites.google.com/site/computers ... benchmarks**
An AMD Ryzen 7 1800X scores 60 points with the Komodo benchmark. (8 cores, 16 threads)
2x Intel Xeon E5-2660 v3* (20 cores, 40 threads) scores 59 points.
But the same Xeons with hyperthreading off (so 20 cores = 20 threads) score 62 points in the Komodo benchmark.**
The 2x Intel Xeon E5-2660 v3* are benched at 49-50 mnps on ipmanchess with HT on.
But only 38.1 mnps with hyperthreading off.
http://www.ipmanchess.yolasite.com/amd- ... -bench.php
While an overclocked Ryzen R7 1800X does "just" 28.5 mnps.
So 50 mnps on 40 threads is equal to at most 28.5 mnps on 16 threads.
And 38.1 mnps of 20 real cores outperform 40 threads (49-50 mnps) on the same machine!
*They're benched by the same person too.
**The Komodo benchmark tests a machine's ability to quickly find the solution to multiple tactical puzzles.
I honestly would not be surprised if an overclocked i9 7980XE easily beats the 96 core machine chess.com uses.
nps is only a measure of strength between 2 systems using an equal amount of physical cores.
Time to depth is a much better benchmark.