Dev Builds » 20180327-1508

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NCM plays each Stockfish dev build 20,000 times against Stockfish 14. This yields an approximate Elo difference and establishes confidence in the strength of the dev builds.


Host Duration Avg Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo

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ID Host Base NPS Games WLD Standard Elo Ptnml(0-2) Gamepair Elo CLI PGN


Commit ID 8ff2fcf299ac621779dc167ce750ba73aaae90a4
Author Ondrej Mosnáček
Date 2018-03-27 15:08:08 UTC
Refactor tbprobe.cpp This involves: * replacing the union hacks with simply reusing the EntryPiece arrays for the no-pawns case * merging the PairsData structure with the EntryPiece/-Pawn structs (with credit to Marco: @mcostalba) * simplifying some HashTable functions * thanks to previous changes, removing the ugly memsets * simplifying the template logic for WDL/DTZ distinction (now we distinguish based on an enum type, not the entry classes) * removing the unneeded Atomic wrapper ----------------------------- For reference, here is a manual way to check that patches concerning table bases code are non-functional changes: 0) Download the Syzygy table bases (up to 6 men). 1) Make sure you have branches master and the pull request pointing to the right commits. 2) Download the bench calculation scripts from the following URL: and copy into src inside your Stockfish repo. 3) Make the scripts executable (chmod +x *.sh). 4) Run the following command to use TBs located at <path>: export SYZYGY_PATH='<path>' 5) After that, run this (it will take a long time, this is a deep bench): BENCH_ARGS='128 1 22' ./ master tbprobe_cleanup 2>/dev/null` ==> You should see two equal numbers printed. (Of course, now we have to trust that the script itself is correct :) ----------------------------- Closes No functional change.
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