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Release V1.34

V1.34 was released on 2019-Feb-09. You can download the release ZIP file (5 MB):

Download V1.34

Changes from V1.33

  • Added search output during calculation, accessible via the INFO key.
  • Changed the final 50 move eval flattening from 0% to 10% target in order to avoid losing moves.
  • Fixed the erroneous shutdown above 5.4 V input voltage.

Known issues

All versions

  • The PV may contain an illegal move in the rare case that a PV position allows pawn takes queen with queening, but this is not the best move. However, the root move is not affected so that no illegal move will be played.
  • Capturing a castling enabled rook and then recapturing with another rook keeps the castling rights.

Embedded target

  • When entering a new position after undoing or redoing moves, the move list in the main screen is not cleared.
  • The firmware is not compatible with the Olimex H405 mainboard variant that has a GigaDevice GD32F405 controller instead of an STMicroelectronics STM32F405.

UCI versions

  • The “en passant” square given via FEN position string is discarded erroneously.
  • 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.