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multi-pv tournament?
Posted: Fri May 05, 2017 2:00 am
by clumma
Has a tournament ever been tried with multi-pv enabled (say, = 3)?
Many humans use engines for analysis with multi-pv on, but how do we know strongest engine in conventional matches is still strongest when running multi-pv?
Re: multi-pv tournament?
Posted: Fri May 05, 2017 9:21 am
by Engin
yes would be interesting too, but the strongest chess engines are stockfish, komodo, houdini, so many of the people are using this engines to analyze his games.
Re: multi-pv tournament?
Posted: Sat May 06, 2017 2:40 am
by leavenfish
I'm afraid I do not understand the question. It is not possible.
Re: multi-pv tournament?
Posted: Sat May 06, 2017 3:16 am
by clumma
It's true that a supervisor program of some kind would have to make moves on a certain schedule (10s per move for example). Hardly impossible.
Re: multi-pv tournament?
Posted: Mon May 08, 2017 7:38 pm
by petero2
clumma wrote:Has a tournament ever been tried with multi-pv enabled (say, = 3)?
Many humans use engines for analysis with multi-pv on, but how do we know strongest engine in conventional matches is still strongest when running multi-pv?
I know this is not really what you asked for, but it is related.
I modified texel to be able to use multi-pv mode when playing games. I played some matches using this texel version and different multi-pv and time control settings.
Code: Select all
Player 1 Player 2 Elo diff
MPV Time MPV Time
2 6+0.06 1 6+0.06 -52
2 12+0.12 1 6+0.06 +112
1 12+0.12 1 6+0.06 +144
2 12+0.12 1 12+0.12 -40
4 12+0.12 1 6+0.06 +19
5 12+0.12 1 6+0.06 -19
"6+0.06" means 6 seconds per game + 0.06 seconds increment per move, so these were hyper bullet games. The number of games in each match was at least 4000.
In summary, if you use a multi-pv value of 4 or 5, you need about twice as much thinking time to get the best move to be equally good as when not using multi-pv.
The above conclusion is of course not necessarily valid for other engines and for longer thinking time.
Re: multi-pv tournament?
Posted: Mon May 08, 2017 10:37 pm
by clumma
Very interesting, Peter. Thanks for sharing your results!
Re: multi-pv tournament?
Posted: Mon May 08, 2017 11:10 pm
by yurikvelo
I'm afraid I do not understand the question.
Question is: "If engine_A_ELO > engine_B_ELO" in singlePV mode, does it guarantee "engine_A_ELO > engine_B_ELO" in multiPV=3?
In other words: can multiPV hurt one engine more than other?
Is ELO difference between A and B the same in multi=1 and multi=3 mode?
Do we need to measure strength also in multi>1?