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Release V1.45

V1.45 was released on 2023-Aug-29. You can download the release ZIP file (4 MB):

Download V1.45

For automated tuning, Lichess-Big3-Resolved has been used, available as separate ZIP file (124 MB): Download training data. Refer to the documentation of the build process for compiling the engine with tuning enabled.

Changes from V1.44

  • Added more options for the operator time bonus in tournament and game-in modes.
  • Added fade-out option for automatic backlight mode.
  • Added option for display brightness.
  • Removed wrap-around for numeric parameters in the menu.
  • Added support for the Gigadevice GD32F405 controller which is 20% faster than the STM32F405.
  • The image file size is now variable depending on the actual firmware size.
  • The opening book compiler adjusts the lookup table according to the book size.
  • The build tools for Windows have changed from 32 bit to 64 bit. See the build instructions for building under 32 bit Windows.
  • Updated the ARM GCC version from 7.3.1 to 12.3.1 (2.5% faster).
  • Added machine-tuned piece values and square tables.
  • Improved futility pruning.
  • When being in check, the move time is reduced by 33% instead of 50%.
  • Capturing a castling enabled rook and then recapturing with another rook no longer keeps the castling rights.

UCI versions

  • Removed tbhits output in search.
  • No prebuilt executables for Raspberry Pi supplied anymore.

Known issues

UCI versions

  • Elo throttling with move time below 15 seconds can add up to 50 Elo instead of subtracting.

Note: issues are fixed with new releases only – there are no backports. However, if an issue is found, it will be listed for the previous releases where applicable.