Honey XIr1 source released

[MikeB]

https://github.com/MichaelB7/Stockfish/ ... /honey.zip

a modest 5 to 7 elo gain, but now with some of the HekaStockfish presearch code, modified, which I have labeled profound.

The profound (presearch) code does a much wider search early on - I offer two profound settings and they are both simply on and off switches.

As part of my testing , I had determined that the setting should be a higher value as the the time control increases this is done automatically by th e time control selected:

this setting is turned on by default for Honey BlueFish and Black-Diamond and off for Stockfish flavor XIr1 as that version always keep that in sync with cur-dev Stockfish functionally

option name Profound type check default true

the go infinite cand the go depth commands does not use a time control, so there is a second setting called :

option name Deep_Pro_Analysis type check default false which is always off by default.

It is to be used with 15 minute analysis . For longer analysis, say 1 hour , you might be better off using go movetime 3600000 ( or go mt 3600 , mt is in seconds . movetime is in milliseconds

You also now type 's' or 'set' to view all available command line terminal shortcuts

# Black-Diamond-XI-r1
Black Diamond XI-r1 by T. Romstad, M. Costalba, J. Kiiski, G. Linscott
info string Hash LargePages 256 Mb
s

Shortcut Commands:

setoption name 'option name' value 'value'
is replaced by:
set (or 's'), 'option name' or 'option shortcut' 'value'

Note: set (or 's'), without an 'option' entered displays the shortcuts

'd' is the shortcut for 'depth'
'dpa' is the shortcut for 'Deep_Pro_Analysis'
'g' is the shortcut for 'go'
'i' is the shortcut for 'infinite'
'lp' is the shortcut for 'Large Pages'
'm' is the shortcut for 'Mate'
'mv' is the shortcut for 'MultiPV'
'mt' is the shortcut for 'Movetime'->

Note: 'mt' is in seconds, while
'Movetime' is in milliseconds

'p f' is the shortcut for 'position fen'
'pro' is the shortcut for 'Profound'
'sm' is the shortcut for 'SearchMoves'

Note: 'sm' or 'SearchMoves' MUST be the
last option on the command line!

't' is the shortcut for 'Threads'
'q' is the shortcut for 'quit'
'z' is the shortcut for 'SyzygyPath'
'?' is the shortcut for 'stop'

will create and start adding exe's to the release page tomorrow.

[Damir]

Thanks Mike. Any executables available ?

[MikeB]

Thanks Mike. Any executables available ?

There is now!

https://github.com/MichaelB7/Stockfish/ ... /tag/Xi-r1

Windows, Mac Linux

Mac and Linux have officially dropped 32 bit support and so have I.
The base windows 32 bit and 64 bit versions are compiled for the lowest common denominator systems.
The Threadripper for Windows has bmi1 instructions , but not the bmi2 instructions ( and large pages is on by default)

[Ovyron]

Thanks Mike! It'll be interesting if with enough time the profound settings will leave humanity obsolete (since the positions where defaults don't find a move that profound does would be examples of ones where human interaction would have helped the engine play better moves. But now they're examples of how with profound human interaction isn't necessary for them.)

In my experiments I've seen instances where the engine doesn't find a move, not even with "presearch" at the start of the search, but where turning on "presearch" at a later point does find the move (it's just analyzing with SinglePV for some number of nodes and then switching to MultiPV at that point, and the best move is found), so I wonder if settings that make the engine switch between SinglePV and MultiPV at some points in the search will be the future (a future without scenarios where humans can help the engine...)

[Dann Corbit]

To Mike:
I notice in the downloads that you have a threadripper build.
I have found that (at least for long analysis periods) the builds with znver2 are not as fast as my ordinary modern builds.
Did you do some customization, or is it just Honey that benefits?

[MikeB]

To Mike:
I notice in the downloads that you have a threadripper build.
I have found that (at least for long analysis periods) the builds with znver2 are not as fast as my ordinary modern builds.
Did you do some customization, or is it just Honey that benefits?

I'm not using znver1 or znver2 , did not mean to imply that but I understand why you asked that. I simply added bmi1 which can cause problems on machines which are truly just popcnt machines, hence the threadripper designation.

[MOBMAT]

besides lots of hash, syzygy, and threads, what other setting maximize finding mates the quickest?

[peter]

There is now!

https://github.com/MichaelB7/Stockfish/ ... /tag/Xi-r1

Thanks a lot!
The modern compiles of all of of the engines can't use more than 16G hash at Win7x64.. At 32 they cause exception but only with more than 1 thread.
Nevermind, r1 ist tactically very strong.

[MikeB]

There is now!

https://github.com/MichaelB7/Stockfish/ ... /tag/Xi-r1

Thanks a lot!
The modern compiles of all of of the engines can't use more than 16G hash at Win7x64.. At 32 they cause exception but only with more than 1 thread.
Nevermind, r1 ist tactically very strong.

Win 7 home or pro?

[kramnik]

Is there any comparison with a recent vanilla Stockfish in strength? I was thinking to put this engine on my website.