Retire polyglot.ini All actively maintained GUI are able to understand UCI protocol, so there is no more need for this obsolete file. No functional change.
Update polyglot.ini after last patch No functional change.
Retire "Idle Threads Sleep" UCI option After last Joona's patch there is no measurable difference between the option set or unset. Tested by Andreas Strangmüller with 16 threads on his Dual Opteron 6376. After 5000 games at 15+0.05 the result is: 1 Stockfish_14050822_T16_on : 3003 5000 (+849,=3396,-755), 50.9 % 2 Stockfish_14050822_T16_off : 2997 5000 (+755,=3396,-849), 49.1 % bench: 880215
Remove "Max Threads per Split Point" UCI option Experimental patch to verify if drop of nps in endgames at very long TC is due to this. Suggested by Ronald de Man. bench: 7451319
Retire UCI_AnalyseMode option It has been obsoleted out already some time ago and currently there is no point in changing eval score according to if we are in game or analyzing. So retire the option. No functional change.
Restore development version bench: 8596156
Stockfish DD Stockfish bench signature is: 8596156
Restore development version No functional change.
Stockfish 4 Stockfish bench signature is: 4132374
Update polyglot.ini with new "Min Split Depth" default No functional change.
Rename some UCI options Thanks to Don, Miguel, Louis and the other people of talkchess forum for the suggestion: http://www.talkchess.com/forum/viewtopic.php?t=48612 Also sync polyglot.ini with current UCI options No functional change.
Add Pawn Structure also to polyglot.ini No functional change.
Re-add "Pawn Structure" UCI option And reshuffle the code to not special case this parameter. No functional change.
Restore development version No functional change.
Stockfish 3 Stockfish bench signature is: 4176431
Re-add 'Cowardice' and 'Aggressiveness' UCI options I have lost my bet with Jean-Paul, so now I re-add the two options...and I am glad of it :-) No functional change.
Retire 'Cowardice' and 'Aggressiveness' UCI options They are not self-describing and create a lot of user requests about them. Given that the values are already well tuned there is no need to expose them as UCI options. No functional change.
Add Contempt Factor in Polyglot The contempt factor was previously not included in polyglot.ini
Restore development version
Stockfish 2.3.1 Stockfish bench signature is: 5423738