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@bmdanielsson bmdanielsson released this Jan 12, 2021

New features

  • NNUE based evaluation. Network file is included in the binaries package.
Assets 3

@bmdanielsson bmdanielsson released this Nov 19, 2020

Bug fixes

  • Reverted time management changes introduced in 3.6.0 since they caused a degrade when using Fischer time control
  • Fixed search depth handling when using multiple threads
  • Fixed a number of smaller issues related to search info output
Assets 3

@bmdanielsson bmdanielsson released this Aug 29, 2020

New features

  • MultiPV support

Improvements

  • Improved LMR formula
  • Evaluation of tempo
  • Switched to using only one slot for killer moves
  • Fixed issues with with ordering of promotion moves
  • Use PGO for builds
Assets 3

@bmdanielsson bmdanielsson released this May 21, 2020

Improvements

  • SEE improvements
  • More aggressive SEE pruning
  • Improved time management
  • Added counter move and follow-up move history heuristic
  • Store position evaluation in transposition table
Assets 3

@bmdanielsson bmdanielsson released this Feb 13, 2020

New features

  • Increased max hash size to 128GB
  • Increased max number of threads to 512

Improvements

  • Threat evaluation
  • Evaluation of connected pawns
  • Space evaluation
  • Improvements to time management
  • Switched version of Fathom library to https://github.com/jdart1/Fathom
Assets 3
Pre-release
Pre-release

@bmdanielsson bmdanielsson released this Jan 13, 2020

This is the version of Marvin that played in TCEC S17 QL. It's only marginally stronger than 3.4.0 and is not intended for serious testing.

Assets 3

@bmdanielsson bmdanielsson released this Jul 9, 2019

New features

  • New opening book

Improvements

  • More aggressive late move pruning
  • Improved history heuristic
  • Refactoring of move generation and move selection code
  • A number of smaller tweaks to the handling of the transposition table
  • Some SEE optimizations

Bug fixes

  • Fixed a number of problems related to reading of Polyglot opening books
  • Fixed reporting of seldepth in UCI protocol
Assets 3

@bmdanielsson bmdanielsson released this Apr 16, 2019

Bug fixes

  • Fixed a bug where the engine would sometimes fail to win in a mate-in-x position
Assets 3

@bmdanielsson bmdanielsson released this Apr 6, 2019

Bug fixes

  • Fixed syntax of UCI info commands sent to GUI
Assets 3

@bmdanielsson bmdanielsson released this Apr 6, 2019

New features

  • Added LogLevel command for UCI
  • Improved info reporting for UCI
  • Adam optimizer for the tuner

Improvements

  • Lots of refactoring and bug fixes
  • Evaluate free passed pawns
  • Counter move heuristic for move ordering
  • Recapture extension
  • Improved depth selection scheme for Lazy SMP
  • Tuned margins for futility pruning and reverse futility pruning
Assets 3