Welcome to Chiron Chess

Chiron is a very strong chess engine. You can read more about its history and development in the About page.


Its main features are:

  • playing strength of about 3240 Elo points on single core*
  • parallel search for up to 512 threads
  • adjustable playing strength with autolimitation of book knowledge
  • support for UCI and Winboard2 communication protocols
  • MultiPV and searchmoves for game analysis
  • support for Chess960
  • support for Polyglot, CTG and Arena opening books
  • support for Syzygy, Nalimov and Gaviota tablebases
  • support for Scorpio bitbases
  • smart detection of pawn blockages


*CCRL 40/4 list