v0.23.0-rc1

• Support for Fischer Random Chess (UCI_Chess960 option to enable FRC-style castling). Also added support for FRC-compatible weight files, but no training code yet.
• New option --logit-q (UCI: LogitQ). Changes subtree selection algorithm a bit, possibly making it stronger (experimental, default off).
• Lc0 now reports WDL score. To enable it, use --wdl-info command-line argument or UCI_WdlInfo UCI option.
• Added "Badgame split" mode during the training. After the engine makes inferior move due to temperature, the game is branched and later the game is replayed from the position of the branch.
• Added experimental --short-sightedness (UCI: ShortSightedness) parameter. Treats longer variations as more "drawish".
• Lc0 can now open Fat Fritz weight files.
• Time management code refactoring. No functional changes, but will make time management changes easier.
• Lc0 logo is now printed in red! \o/
• Command line argument -v is now short for --verbose-move-stats.
• Errors in --backend-opts parameter syntax are now reported.
• The most basic version of "certainty propagation" feature (actually without "propagation"). If the engine sees checkmate, it plays it! (before it could play other good move).
• Various small changes: hidden options to control Dirichlet noise, floating point optimizations, Better error reporting if there is exception in worker thread, better error messages in CUDA backend.

v0.22.0

No change from v0.22.0-rc1 other than version number.

v0.22.0-rc1

Bunch of small changes that piled up from last major release.

(Do Not Use - incorrectly tagged) v0.21.5-rc1

Remove softmax calculation from backends and apply it after filtering for illegal moves to ensure spurious outputs on illegal moves don't reduce (or entirely remove) the quality of the policy values on the legal moves. This was especially noticeable on fp16 backends for nets trained with legal move masking, but could theoretically be an improvement for any net.

v0.21.4

Two small changes in this release.

• A fix for crashes that can occur during use of sticky-endgames
• Change the false positive value reported when in wdl style resign and display average nodes per move as part of tournament stats in selfplay mode.

v0.21.3

Bug fix release:

• Fix for potential memory corruption/crash in using small networks or using the wdl head with cuda backends. #892
• Fix for building with newer versions of meson. #904

v0.21.2

Changes since v0.21.2-rc3

• Centipawn formula retweaked to show 128.00 instead of 127.99 pawns for checkmate.

Since v0.21.1

Highlights:

• --sticky-engames (minimal version of certainty propagation)
• New centipawn formula
• Way to exit training gracefully
• Optimizations for GTX 16xx videocards (cudnn-fp16 works now)
• Optimizations for larger filter sizes

v0.21.2-rc3

The only change from RC2 is a centipawn formula:

centipawn = 295 * Q / (1 - 0.976953125 * Q^14)

v0.21.2-rc2

Changes

• Add 320 and 352 channel support for fused SE layer (#855)
• SE layer fix when not using fused kernel (#852)
• Fp16 nchw for cudnn-fp16 backend (support GTX 16xx GPUs) (#849)
• Install lc0 on openSUSE - Full documentation, Install script and links to experimental RPM packages (#675)

v0.21.2-rc1

• Make --sticky-endgames on by default (still off in training) (#844)
• update download links in README (#842)
• Recalibrate centipawn formula (#841)
• Also make parents Terminal if any move is a win or all moves are loss or draw. (#822)
• Use parent Q as a default score instead of 0 for unvisited pv. (#828)
• Add stop command to selfplay interactive mode to allow for graceful exit. (#810)
• Increased hard limit on batch size in opencl backend to 32 (#807)