diff --git a/calculate_score.groovy b/calculate_score.groovy
new file mode 100644
index 0000000000000000000000000000000000000000..be4347b7ad9de3ae1df34d1a8f5be2b1e5f36abb
--- /dev/null
+++ b/calculate_score.groovy
@@ -0,0 +1 @@
+_score * doc['score']