Separate late move reductions from futility pruning

[brunocodutra]

Gauntlet

cutechess-cli -tournament gauntlet -games 2 -rounds 1500 -openings file=engines/openings-6ply-1000.pgn plies=6 policy=round -concurrency 12 -ratinginterval 10 -resultformat wide -recover -engine conf=dev stderr=stderr.log -engine conf=Pawn-3.0 -engine conf=Halogen-12.0 -engine conf=Willow-4.0 -each tc=3+0.025 option.Hash=32 option.Threads=1

Rank Name                          Elo     +/-   Games    Wins  Losses   Draws   Points   Score    Draw 
   0 dev                            12       5    9000    2703    2382    3915   4660.5   51.8%   43.5% 
   1 Halogen-12.0                   17       9    3000     917     767    1316   1575.0   52.5%   43.9% 
   2 Pawn-3.0                      -18       9    3000     726     881    1393   1422.5   47.4%   46.4% 
   3 Willow-4.0                    -37      10    3000     739    1055    1206   1342.0   44.7%   40.2%

STS1-STS15_LAN_v6.epd

python sts_rating.py -f "./epd/STS1-STS15_LAN_v6.epd" -e dev -t 8 -h 256 --movetime 100 --maxpoint 100

STS Rating v14.2
Engine: chessboard
Hash: 256, Threads: 8, time/pos: 0.100s

Number of positions in ./epd/STS1-STS15_LAN_v6.epd: 1188
Max score = 1188 x 100 = 118800
Test duration: 00h:02m:30s
Expected time to finish: 00h:02m:34s

  STS ID   STS1   STS2   STS3   STS4   STS5   STS6   STS7   STS8   STS9  STS10  STS11  STS12  STS13  STS14  STS15    ALL
  NumPos     85     80     86     89     85     80     82     80     71     79     70     74     75     79     73   1188
 BestCnt     70     66     66     70     70     56     59     58     49     66     55     53     63     60     48    909
   Score   7879   7381   7712   8225   8087   7653   7316   7085   6129   7520   6516   6730   6997   7152   6570 108952
Score(%)   92.7   92.3   89.7   92.4   95.1   95.7   89.2   88.6   86.3   95.2   93.1   90.9   93.3   90.5   90.0   91.7

:: STS ID and Titles ::
STS 01: Undermining
STS 02: Open Files and Diagonals
STS 03: Knight Outposts
STS 04: Square Vacancy
STS 05: Bishop vs Knight
STS 06: Re-Capturing
STS 07: Offer of Simplification
STS 08: Advancement of f/g/h Pawns
STS 09: Advancement of a/b/c Pawns
STS 10: Simplification
STS 11: Activity of the King
STS 12: Center Control
STS 13: Pawn Play in the Center
STS 14: Queens and Rooks to the 7th rank
STS 15: Avoid Pointless Exchange

:: Top 5 STS with high result ::
1. STS 06, 95.7%, "Re-Capturing"
2. STS 10, 95.2%, "Simplification"
3. STS 05, 95.1%, "Bishop vs Knight"
4. STS 13, 93.3%, "Pawn Play in the Center"
5. STS 11, 93.1%, "Activity of the King"

:: Top 5 STS with low result ::
1. STS 09, 86.3%, "Advancement of a/b/c Pawns"
2. STS 08, 88.6%, "Advancement of f/g/h Pawns"
3. STS 07, 89.2%, "Offer of Simplification"
4. STS 03, 89.7%, "Knight Outposts"
5. STS 15, 90.0%, "Avoid Pointless Exchange"

[codecov]

Codecov Report

Attention: Patch coverage is 96.55172% with 1 line in your changes missing coverage. Please review.

Project coverage is 96.15%. Comparing base (a9046ed) to head (eeec246).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/search/engine.rs	95.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #673      +/-   ##
==========================================
- Coverage   96.20%   96.15%   -0.06%     
==========================================
  Files          47       47              
  Lines        3242     3249       +7     
==========================================
+ Hits         3119     3124       +5     
- Misses        123      125       +2     

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