diff --git a/_questions/llm-zoomcamp/module-2-vector-search/010_1a7b27c4df_idxerror-best-chunk-vector-search.md b/_questions/llm-zoomcamp/module-2-vector-search/010_1a7b27c4df_idxerror-best-chunk-vector-search.md
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+---
+id: 1a7b27c4df
+question: 'Why do I get IndexError: list index out of range when accessing the best
+  chunk?'
+sort_order: 10
+---
+
+The error typically happens when the number of embeddings you generate does not match the number of document chunks. Make sure you create embeddings directly from the chunk list:
+
+```python
+contents = [chunk["content"] for chunk in chunks]
+X = embedder.encode_batch(contents)
+```
+
+The number of rows in `X` should be equal to `len(chunks)`.