v0.3.6

Bug Fixes

• Reinitialize selective depth on call to search
• Fix inverted calculation of least valuable attacker score
• Ensure quiescence nodes are never used for pv
• Don't overwrite exact hash table entries with non-exact evals
• Resolve hash collisions by comparing to original key

Miscellaneous Tasks

• Various minor lint fixes
• Stop including release candidate tags in changelog

Performance

• Calculate negative score when sorting instead of sort then reverse
• Modify move ordering score when destination is attacked
• Use depth in hash table replacement strategy

Refactor

• Clean up syntax used for bitboard mutations
• Implement Not operator for Color enum to simplify some match blocks

Testing

• Add test for hash key random uniqueness

v0.3.6-rc.5

Bug Fixes

• Reinitialize selective depth on call to search
• Fix inverted calculation of least valuable attacker score
• Ensure quiescence nodes are never used for pv
• Don't overwrite exact hash table entries with non-exact evals
• Resolve hash collisions by comparing to original key

Miscellaneous Tasks

• Various minor lint fixes
• Stop including release candidate tags in changelog

Performance

• Calculate negative score when sorting instead of sort then reverse
• Modify move ordering score when destination is attacked
• Use depth in hash table replacement strategy

Refactor

• Clean up syntax used for bitboard mutations
• Implement Not operator for Color enum to simplify some match blocks

Testing

• Add test for hash key random uniqueness

v0.3.6-rc.4

Bug Fixes

• Reinitialize selective depth on call to search
• Fix inverted calculation of least valuable attacker score
• Don't overwrite exact hash table entries with non-exact evals
• Resolve hash collisions by comparing to original key

Miscellaneous Tasks

• Various minor lint fixes
• Stop including release candidate tags in changelog

Performance

• Calculate negative score when sorting instead of sort then reverse
• Modify move ordering score when destination is attacked

Refactor

• Clean up syntax used for bitboard mutations
• Implement Not operator for Color enum to simplify some match blocks

Testing

• Add assert to help prevent erroneous retrival of best move from hash table
• Add test for hash key random uniqueness

v0.3.6-rc.3

Bug Fixes

• Reinitialize selective depth on call to search
• Fix inverted calculation of least valuable attacker score
• Move abort for search to before hash table save
• Don't overwrite exact hash table entries with non-exact evals
• Resolve hash collisions by comparing to original key

Miscellaneous Tasks

• Various minor lint fixes
• Stop including release candidate tags in changelog

Performance

• Decrease default size of hash table
• Calculate negative score when sorting instead of sort then reverse
• Further decrease default hash table size
• Revert changes to default hash table size

Refactor

• Clean up syntax used for bitboard mutations

Testing

• Add assert to help prevent erroneous retrival of best move from hash table
• Add test for hash key random uniqueness

v0.3.6-rc.2

Bug Fixes

• Reinitialize selective depth on call to search
• Fix inverted calculation of least valuable attacker score

Miscellaneous Tasks

• Various minor lint fixes
• Stop including release candidate tags in changelog

Performance

• Decrease default size of hash table
• Calculate negative score when sorting instead of sort then reverse
• Further decrease default hash table size

Refactor

• Clean up syntax used for bitboard mutations

Testing

• Add assert to help prevent erroneous retrival of best move from hash table

v0.3.6-rc.1

Bug Fixes

• Reinitialize selective depth on call to search
• Fix inverted calculation of least valuable attacker score

Miscellaneous Tasks

• Various minor lint fixes
• Stop including release candidate tags in changelog

Performance

• Decrease default size of hash table
• Calculate negative score when sorting instead of sort then reverse

Refactor

• Clean up syntax used for bitboard mutations

v0.3.5

Testing

• Refactor benchmarks to use shared test positions
• Add basic iai benchmark for alpha beta

v0.3.5-rc.1

Bug Fixes

• Display engine author and name on separate id lines
• Add missing increment for fifty move rule
• Improve calculation of move time

Features

• Include selective search depth in uci info output
• Increase selective search depth for positions where in check

Miscellaneous Tasks

• Don't include release commits in changelog

Performance

• Optimize check for repeated positions

Refactor

• Move bitboard trait to standalone module

v0.3.4

Bug Fixes

• Try clearing cache key for moves made
• Fix off by one error for white checkmate in calculations

Documentation

• Add brief description of project purpose to README

Miscellaneous Tasks

• Add checksum to release created in CI
• Update pretty_assertions to fix security warning
• Disable criterion compare CI step until it is fixed

Performance

• Use bitmask to avoid checking empty squares during evaluation
• Increase maximum depth for quiescence search to prevent horizon effects

Refactor

• Use array instead of vector for magic bits

v0.3.3

Bug Fixes

• Try re-ordering draw check to prevent draws in winning positions
• Slightly increase score for 5th rank pawns
• Add template for cargo-release commit messages

Documentation

• Add basic usage to readme

Miscellaneous Tasks

• Add CI job to compare benchmarks on pull requests

Performance

• Use small vec instead to reduce allocations in move generation

Refactor

• Clean up some tests by using a macro

Styling

• Minor lint fixes based on clippy output
• Add pre-commit config and associated initial fixes

Testing

• Fix transposition table shortcutting alpha-beta benchmarks