Movement with only starting cards is mostly good

card_stuffs/src/lib.rs

@@ -376,6 +376,18 @@ impl Klondike {
             CardPosition::TopWaste | CardPosition::Foundation(_) => false
         }
     }
+
+    pub fn lowest_visible_card_in_pile_from_index(self, pile: usize, index: usize) -> usize {
+        if self.piles[pile].len() == 0 {
+            return 0;
+        }
+        for (i, card) in self.piles[pile].iter().skip(index).enumerate() {
+            if card.visible {
+                return i; 
+            }
+        }
+        panic!("Pile with only facedown cards - this is wrong")
+    }
 }
 
 impl CardPosition {