Function inanis::engine::search::movepick::assign_quiet_scores

source ·

fn assign_quiet_scores(
    context: &SearchContext,
    state: &mut MoveGenState,
    start_index: usize
)

Expand description

Assigns quiet scores for moves by filling move_scores array with moves_count length (starting from start_index), based on current context. If transposition table move is available, it’s passed as tt_move too. Moves are prioritized as follows (from most important to the less ones):

for transposition table move, assign MOVEORD_HASH_MOVE
for every promotion (excluding these with capture), assign MOVEORD_QUEEN_PROMOTION, MOVEORD_ROOK_PROMOTION, MOVEORD_BISHOP_PROMOTION or MOVEORD_KNIGHT_PROMOTION
for every move found in killer table, assign MOVEORD_KILLER_MOVE_1 or MOVEORD_KILLER_MOVE_2
for every countermove, assign MOVEORD_COUNTERMOVE
for every castling, assign MOVEORD_CASTLING
for every quiet move which didn’t fit in other categories, assign score from history table