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Saturday, August 26, 2017

Stockfish 17082210 - new version!

Stockfish, chess engine UCI

Leader rating list JCER = 3331
🔬 Author: Stéphane Nicolet

More:
Timestamp: 1503389779 

Avoid constructing an empty tuple in qsearch 

Avoid constructing, passing as a parameter and binding a useless empty tuple of pointers in the qsearch move picker constructor. 

Also reformat the scoring function in movepicker.cpp and do some cleaning in evaluate.cpp while there. 

No functional change. 

⭐⭐⭐   Stockfish 17082210 - download

2 comments:

  1. Comparing to Stockfish 17072711, this new version 17082210 ran better (200-152-648, 99.4% certainty) at 10-second games (d=15) but worse (49-85-411, 99.88% certainty) at 1 minute games (d=21). This new version is running out its clock sometimes (48 of 152 losses at 10 sec, and 7 of 85 at 1 minute), whereas the old version never did. See LittleBlitzer results below for details.

    Games Completed = 1000 of 1000 (Avg game length = 17.435 sec)
    Settings = RR/128MB/10000ms in 100 moves/M 1000cp for 12 moves, D 150 moves/
    Time = 12489 sec elapsed, 0 sec remaining
    1. Stockfish 270717 64 POPCNT 476.0/1000 152-200-648 (L: m=74 t=0 i=0 a=126) (D: r=510 i=86 f=15 s=12 a=25) (tpm=131.7 d=14.87 nps=1135211)
    2. Stockfish 220817 64 POPCNT 524.0/1000 200-152-648 (L: m=36 t=48 i=0 a=68) (D: r=510 i=86 f=15 s=12 a=25) (tpm=124.6 d=15.45 nps=1160743)


    Games Completed = 545 of 1000 (Avg game length = 106.620 sec)
    Settings = RR/128MB/60000ms in 100 moves/M 1000cp for 12 moves, D 150 moves/
    Time = 29981 sec elapsed, 25030 sec remaining
    1. Stockfish 270717 64 POPCNT 290.5/545 85-49-411 (L: m=10 t=0 i=0 a=39) (D: r=326 i=50 f=13 s=6 a=16) (tpm=802.1 d=21.38 nps=1303321)
    2. Stockfish 220817 64 POPCNT 254.5/545 49-85-411 (L: m=11 t=7 i=0 a=67) (D: r=326 i=50 f=13 s=6 a=16) (tpm=721.9 d=21.55 nps=1309207)

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