logic improvements

benches/future_children.rs

@@ -7,10 +7,11 @@ use othello::{
 fn extend_layers_no_pruning(depth: usize, arena_size: usize) -> usize {
     let config = FutureMoveConfig {
         max_depth: depth,
-        min_arena_depth_sub: 4,
-        top_k_children: 2,
-        up_to_minus: usize::MAX, // disable pruning
+        min_arena_depth_sub: 0,
+        top_k_children: 5,
+        up_to_minus: 4,
         max_arena_size: arena_size,
+        do_not_prune: true,
     };
     let mut fut = FutureMoves::new(Piece::Black, config);
     fut.set_root_from_board(Board::new().starting_pos());