general code improvements

src/complexagent.rs

@@ -104,28 +104,27 @@ impl FutureMoves {
         board: &Board,
         color: Piece,
     ) -> Vec<usize> {
-        let children: Vec<_> = board
-            .possible_moves(color)
-            .flat_map(|(i, j)| board.what_if(i, j, color).map(|x| (i, j, x)))
-            .map(|(i, j, (new_board, captured))| {
-                let winner = new_board.game_winner(color);
-                Move {
-                    i,
-                    j,
-                    captured,
-                    color,
-                    board: new_board,
-                    winner,
-                    parent,
-                    children: Vec::new(),
-                    value: 0,
-                }
-            })
-            .collect();
-
         let parent_idx = parent;
         let start_idx = self.arena.len();
-        self.arena.extend(children);
+        self.arena.extend(
+            board
+                .possible_moves(color)
+                .flat_map(|(i, j)| board.what_if(i, j, color).map(|x| (i, j, x)))
+                .map(|(i, j, (new_board, captured))| {
+                    let winner = new_board.game_winner(color);
+                    Move {
+                        i,
+                        j,
+                        captured,
+                        color,
+                        board: new_board,
+                        winner,
+                        parent,
+                        children: Vec::new(),
+                        value: 0,
+                    }
+                }),
+        );
         let new_indices: Vec<usize> = (start_idx..self.arena.len()).collect();
 
         if let Some(parent_idx) = parent_idx {
@@ -249,7 +248,7 @@ pub struct ComplexAgent {
 
 impl ComplexAgent {
     pub fn new(color: Piece) -> Self {
-        const MAX_DEPTH: usize = 7;
+        const MAX_DEPTH: usize = 6;
         Self {
             color,
             future_moves: FutureMoves::new(color, MAX_DEPTH),