feat: order transpositions by score too

1 files changed, 10 insertions, 3 deletions

diff --git a/src/grossmeister/ttable.rs b/src/grossmeister/ttable.rs
index 0420e22..8838093 100644
--- a/src/grossmeister/ttable.rs
+++ b/src/grossmeister/ttable.rs
@@ -44,10 +44,17 @@ impl PartialOrd for TranspositionTableItem {
     fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
         // Order by depth first, then node type
         let depth_ordering = self.depth.partial_cmp(&other.depth);
-        match depth_ordering {
-            Some(Ordering::Equal) => self.node_type.partial_cmp(&other.node_type),
-            _ => depth_ordering,
+        if depth_ordering != Some(Ordering::Equal) {
+            return depth_ordering
         }
+
+        let node_ordering = self.node_type.partial_cmp(&other.node_type);
+
+        if node_ordering != Some(Ordering::Equal) {
+            return node_ordering
+        }
+
+        self.score.partial_cmp(&other.score)
     }
 }