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Release V1.41

V1.41 was released on 2020-Aug-29. You can download the release ZIP file (4 MB):

Changes from V1.40

  • Improved fail-high handling at root.
  • Increased check deepening from two to three moves.
  • Endgames with a minor piece ahead but no pawns are recognised as drawish.
  • Improved mate score reliability from hashtables.
  • More opening knowledge.

UCI versions

  • Using “searchmoves” does not block the internal opening book.


  • Changed time measurement to native Windows functions.


  • The Android build chain has been updated from NDK r21 to r21d.
  • Dropped binaries for x86 CPUs. Only ARM is supported.

Raspberry Pi

  • Rolled back the GCC version from 8.3.0 (Buster) to 6.3.0 (Stretch).

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.

Embedded target

  • When entering a new position after undoing or redoing moves, the move list in the main screen is not cleared.

UCI versions

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

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.