Function inanis::engine::search::runner::iir_can_be_applied

fn iir_can_be_applied(
    context: &mut SearchContext,
    depth: i8,
    hash_move: Move
) -> bool

The main idea of the internal iterative reduction is that nodes without hash moves are potentially less important, so we try to save time here by reducing depth a little bit. This is not always true, but some inaccuracies should be recompensated by deeper search.

Conditions:

• depth >= iir_min_depth
• hash move does not exists