Releases · chris-moreton/rusty-rival

11 Jan 22:33

github-actions

v1.0.17

af11bfe

v1.0.17 Latest

Latest

UCI Protocol Improvements

This release improves UCI protocol compliance, enabling better integration with chess GUIs and tournament software.

Stop Command Support

The stop command is now fully implemented. Search runs in a background thread, allowing the GUI to send stop at any time to immediately halt the search and return the best move found so far. This is essential for:

Time-scramble situations where the GUI needs to force a move
Analysis mode where users want to interrupt long searches
Tournament software that enforces time controls

Additional UCI Improvements

Ponder move in bestmove: Now outputs bestmove <move> ponder <move> when a ponder move is available from the PV. Note: This is informational only - the engine does not yet support actual pondering (go ponder / ponderhit).
Nodes limit: go nodes <n> now correctly stops the search after the specified number of nodes
Mate search: go mate <n> now searches to the correct depth (2× mate depth for ply conversion)

Bug Fixes

Fixed duplicate info output: When time expired during search, the same info line could be output multiple times. This cluttered GUI displays and logs.
Fixed stack overflow: Resolved stack issues that caused crashes in v1.0.16

Assets 6

11 Jan 15:29

github-actions

v1.0.15

c3414e5

v1.0.15

Engine Bug Fix

Fixed invalid PV output when time expires before search completes (Fixes #47)

When playing with very short time controls, the engine could output stale PV (Principal Variation) data from a previous game or iteration if time expired before the first search iteration completed. This caused UCI interfaces to display incorrect or nonsensical move sequences.

Changes:

Clear root_moves and pv data structures on ucinewgame command
Skip info output when nodes == 0 to prevent outputting stale data before any searching has occurred