Search simplification patch #39

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@lucasart
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lucasart commented Jan 1, 2013

Hello Marco,

I'm not very good with this git stuff, but I forked from your repo, and commited a patch to my branch. Test results are promising so far.

I don't know if this "pull request" thing is the way to do it: we'll see!

Lucas

lucasart added some commits Jan 1, 2013

Merge pull request #1 from mcostalba/master
pull marco's master branch
Remove Threat Extension
Gret code simplification:
- instead do not futility prune threat refutations. allows_move() is therefore removed.
- also remove the !PvNode conditions from SEE pruning (search and qsearch)

4000 games at 50,000 nodes/move:
1085-989-1926 [51.2%] LOS=98.3%

4000 games in 10"+0.1"
756-751-2493 [50.1%] LOS=55.1%

signature = 4343046
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glinscott Jan 1, 2013

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Hi Lucas,

This looks like an interesting idea! My testing is not looking great for it so far though, at 10+0.01:

ELO: -8.83 +- 99%: 15.50 95%: 11.77
LOS: 0.27%
Wins: 424 Losses: 509 Draws: 2413

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glinscott commented Jan 1, 2013

Hi Lucas,

This looks like an interesting idea! My testing is not looking great for it so far though, at 10+0.01:

ELO: -8.83 +- 99%: 15.50 95%: 11.77
LOS: 0.27%
Wins: 424 Losses: 509 Draws: 2413

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RyanTaker Jan 19, 2013

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I think Marco pushed this so you should be able to close the request.

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RyanTaker commented Jan 19, 2013

I think Marco pushed this so you should be able to close the request.

@lucasart lucasart closed this Oct 21, 2013

alwey pushed a commit to alwey/Stockfish that referenced this pull request Nov 23, 2016

Merge pull request #39 from ianfab/master
Variant safety and threat evaluation bonus improvements

snicolet referenced this pull request in snicolet/Stockfish Feb 19, 2017

Opposite bishops and king danger
Opposite bishops favor the attacking player in middlegame, so raise the
king_danger() score by 50% in case of opposite bishops.
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