The Chess.com Computer Chess Championship (CCCC) is continuously running computer chess events and is maintained by Chess.com at https://www.chess.com/computer-chess-championship.

CCC 17 Blitz: Finals

Finals Ordo evaluation:

   # ENGINE       :  RATING  ERROR  CFS(%)    W    D    L   GAMES  DRAWS(%)
   1 Stockfish    :      71     22   100.0  134  308   38     480      64.2
   2 Lc0          :       0   ----     ---   38  308  134     480      64.2

LC0 hardware and settings:

• Hardware: 2x A100, 2x AMD EPYC 7H12, 256 cores (128 physical)
• Non-default parameters:
  • Backend=demux
  • BackendOptions=backend=cuda-fp16,(gpu=0),(gpu=1)
  • MinibatchSize=384
  • MaxPrefetch=37
  • NNCacheSize=20000000
  • CPuct=1.988
  • CPuctBase=45669
  • CPuctFactor=3.973
  • FpuValue=0.290
  • PolicyTemperature=1.186
  • SmartPruningFactor=2.0
  • SmartPruningMinimumBatches=300
  • StrictTiming=true

CCC Rapid 2021: Finals

Finals Ordo evaluation:

   # ENGINE       :  RATING  ERROR  CFS(%)    W    D    L   GAMES  DRAWS(%)
   1 Stockfish    :      43     22   100.0  122  317   61     500      63.4
   2 Lc0          :       0   ----     ---   61  317  122     500      63.4

LC0 hardware and settings:

• Hardware: 2x A100, 2x AMD EPYC 7H12, 256 cores (128 physical)
• Non-default parameters:
  • Backend=demux
  • BackendOptions=backend=cuda-fp16,res_block_fusing=true,(gpu=0),(gpu=1)
  • MinibatchSize=192
  • MaxPrefetch=48
  • MultiGather=true
  • MaxCollisionEvents=917
  • MaxCollisionVisits=1000
  • MaxOutOfOrderEvalsFactor=2.4
  • NNCacheSize=20000000
  • SmartPruningMinimumBatches=100
  • TimeManager=legacy(steepness=4.0)
  • MoveOverheadMs=1000
  • StrictTiming=true