improve error handling in FutureMoves::get_board_from_idx

src/logic/future_moves.rs

@@ -355,14 +355,14 @@ impl FutureMoves {
     }
 
     fn get_board_from_idx(&self, idx: usize) -> Option<Board> {
-        self.move_history(idx).map(|hist| {
+        self.move_history(idx).and_then(|hist| {
             let mut board = self.board;
             for (m, c) in hist {
                 if let Some(m) = m {
-                    board.place(m, c).expect("move would not propegate");
+                    board.place(m, c).ok()?;
                 }
             }
-            board
+            Some(board)
         })
     }