Computer Chess Links
Watch live computer chess See the best engines duke it out at TCEC or Chess.com Watch Leela Chess Zero (and other Lc0 flavors) get tested on Twitch or YouTube at @potato_chess,  @mattblachess,  @ipmanchess,  @brinansee,  @edosani,  Mark Young, and sometimes @westportchess
Free chess engines Stockfish,  Stockfish DEV (development) versions,  BrainFish,  CorChess,  ShashChess,  Ethereal,  Fire,  Komodo 9,  Laser,  Fizbo,  Xiphos,  Allie,  Raubfisch,  and many more at Computer-Chess.org. We also have some computer chess engines to download here.
Free AI chess engines Leela Chess Zero (Lc0) - an AI engine Download the latest release here ("blas" for CPU-only; "cuda" for NVIDIA GPUs; or "OpenCL" for other GPUs). Here is an installation guide. This is how to set it up in a GUI. You need to download a neural network (NNs 41345, 32930, 32890, and 11248 are very strong, but any of the latest NNs will work fine.) If you'd like to contribute your GPUs/CPUs to Leela improvement, you can download the latest client. Here is a tool to get your Leela ratio, and here is the process for getting it going on a Windows PC. Once you've gotten Lc0 set up, you can also try out Anti-Fish, the neural network used to make Stockfish stronger, or Leelenstein. Use the Lc0 engine executable, then use the AntiFish or Leelenstein nn file as the weights file. You can also try LeelaFish, which uses the Lc0 AI with the help of an AB engine, like Stockfish, to find tactical shots.
Chess engine rankings and ratings lists Computer Chess Ratings List (CCRL),  Chess Engine Grand Testing (CEGT)
Opening books Here are some of the chess engine opening books we like for testing.
Endgame tablebase (EGTBs) downloads Olympus Chess or Sesse.net
Free computer chess GUIs Arena chess GUI,  "ChessGUI",  Cute Chess GUI,  and Crafty Bench. We have backups of those programs and more chess GUIs here.
Free computer chess utilities Bayesian Elo calculator,  Ordo ratings calculator,  and PGN Scanner 0.92. We have backups of those programs and more chess utilities here.
Tactical test suites How good is your engine at solving tactical or endgame problems? Use a test suite to find out. We have the Arasan Chess test suite, the Eigenmann test suite, the AH Tactics suite and AH Endgame test suite, and others for download here.
Chess forums TalkChess.com,  Lc0 Discord,  Stockfish Discord

  

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