improve bench for reversals

src/board/mod.rs

@@ -685,7 +685,7 @@ mod tests {
     }
 
     #[allow(dead_code)]
-    fn render_dbg(board: BitBoard) -> BitBoard {
+    pub fn render_dbg(board: BitBoard) -> BitBoard {
         println!("dbg:\n{}", board.render(View::RankAsc, vec![]));
         board
     }

src/game.rs

@@ -34,9 +34,12 @@ impl Game {
 
     /// Play a move but first verify that the move is legal.
     /// Automatically transitions state to next player.
-    pub fn safe_play(&mut self, player_move: Board) {
-        // TODO: validate that move is legal
+    pub fn safe_play(&mut self, player_move: Board) -> Result<(), &'static str> {
+        if self.board.available(self.current_team) & player_move != player_move {
+            return Err("Illegal move");
+        }
         self.play(player_move);
+        Ok(())
     }
 
     pub fn board(&self) -> BitBoard {
@@ -47,7 +50,7 @@ impl Game {
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::board::squares::*;
+    use crate::board::{squares::*, view::View};
     #[test]
     fn play_switches_team() {
         let mut game = Game::default();
@@ -64,4 +67,25 @@ mod tests {
         assert_ne!(og_b, game.board().boards[0]);
         assert_ne!(og_w, game.board().boards[1]);
     }
+
+    pub fn render_dbg(board: BitBoard) -> BitBoard {
+        println!("dbg:\n{}", board.render(View::RankAsc, vec![]));
+        board
+    }
+
+    #[test]
+    fn ten_move_opening() {
+        let plays: Vec<Vec<Board>> = vec![
+            vec![F5, F6, E6, F4, E3, D6, G4, D3, C3, H3],
+            vec![F5, D6, C3, D3, C4, F4, F6, F3, E6, E7],
+            vec![F5, D6, C4, D3, C3, F4, C5, B3, C2, E3],
+            vec![F5, F6, E6, F4, E3, C5, C4, D6, B6, D3],
+        ];
+        for play in plays {
+            let mut game = Game::default();
+            for m in play {
+                game.safe_play(m).expect("Move should be valid");
+            }
+        }
+    }
 }