Finally an update of approximately the above discussed version, but with the latest Stockfish sources until january fifth of this year. As discussed
[You must be registered and logged in to see this link.] Some of the new changes are experimental again though and recently put in there. Just a day ago in fact. In particular, a change to 'improving' definition and a heavy change to the reduction factor R in nullmove. First results were promising but I'm going by my intuition here.
Rainbow Serpent is not really meant for the rating lists anyway, it is too close to Stockfish for that. It is more a research vehicle for me and a tool to get a second opinion on chess positions if Stockfish is not enough. So testing as always has been very limited but everything should be running stable that's the least I can guarantee. If not, if you encounter a malfunction, please post the error message or anything that helps.
The new R should give the engine some added depth but it slows down (scales back)the nullmove reductions in the endgame, scaling with the number of pieces counted by the Syzygy initialization in search.cpp. If this scaling works maybe it could be used in Sockfish too and then it could be optimized in the Framework. I just picked a first number for R from the top of my head.
I have never tested Serpent with Syzygy bases (not downloaded them yet) but I have no reason to think they would not work just as well as they do with Stockfish.
Of the very latest changes in the Stockfish code itself, in the last couple of days, I am fond of the changes by Jonathan Calovski in picking the best thread
[You must be registered and logged in to see this link.], I have a suspicion that really could help Serpent especially when you use hyperthreads like me, or of course if you have a system that can use many cores in parallel. Thanks Jonathan!
DOWNLOAD>>>> [You must be registered and logged in to see this link.]Rainbow Serpent Solstice Edition, 7z archive.
[You must be registered and logged in to see this link.]Thank you Eelco - macOS version with source here:
[You must be registered and logged in to see this link.]Michael B
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