diff --git a/src/repr.rs b/src/repr.rs
index efe90cd..a053589 100644
--- a/src/repr.rs
+++ b/src/repr.rs
@@ -92,9 +92,7 @@ impl Board {
         );
 
         for chain in chains {
-            let mut chain_length: usize = 0;
-
-            for &(new_i, new_j) in &chain {
+            for (chain_length, &(new_i, new_j)) in chain.iter().enumerate() {
                 let Some(piece) = self.get(new_i, new_j) else {
                     break;
                 };
@@ -114,7 +112,6 @@ impl Board {
                     // in both cases, the loop needs to be breaked
                     break;
                 }
-                chain_length += 1;
             }
         }
     }