Stockfish 181117 vs SF8: 2 time controls

[Jouni]

Code: Select all

Games Completed = 2000 of 2000 (Avg game length = 29.040 sec)
Settings = Gauntlet/64MB/10000ms+100ms/M 450cp for 4 moves, D 100 moves/PGN:Hert500.pgn(500)
Time = 14698 sec elapsed, 0 sec remaining
 1.  Stockfish 181117 64 BMI2 	1115.5/2000 460-229-1311  	(L: m=2 t=0 i=0 a=227)	(D: r=893 i=148 f=18 s=19 a=233)	(tpm=246.7 d=19.59 nps=2158683)
 2.  Stockfish 8 64 BMI2        884.5/2000	229-460-1311  	(L: m=0 t=0 i=0 a=460)	(D: r=893 i=148 f=18 s=19 a=233)	(tpm=248.8 d=19.58 nps=2046875)

Code: Select all

Games Completed = 400 of 400 (Avg game length = 164.503 sec)
Settings = Gauntlet/64MB/60000ms+600ms/M 450cp for 4 moves, D 100 moves/PGN:Hert500.pgn(500)
Time = 16890 sec elapsed, 0 sec remaining
 1.  Stockfish 181117 64 BMI2 	236.0/400	100-28-272  	(L: m=0 t=0 i=0 a=28)	(D: r=196 i=23 f=5 s=5 a=43)	(tpm=1469.0 d=25.71 nps=2204055)
 2.  Stockfish 8 64 BMI2      	164.0/400	28-100-272  	(L: m=0 t=0 i=0 a=100)	(D: r=196 i=23 f=5 s=5 a=43)	(tpm=1491.9 d=25.14 nps=2089496)

Interestingly first run is +40 ELO and second +63 ELO! Note bigger depth by 0,5 ply in 2. run.

[Leo]

From what I have read pop is a lot better than BMI2.

[syzygy]

From what I have read pop is a lot better than BMI2.

Only on the new AMD chips (and on older processors which lack the BMI2 instruction set).

[Leo]

OK