  This short document describes a traditional IR system that achieved MRR@100
equal to 0.298 on the MS MARCO Document Ranking leaderboard (on 2020-12-06).
Although inferior to most BERT-based models, it outperformed several neural
runs (as well as all non-neural ones), including two submissions that used a
large pretrained Transformer model for re-ranking. We provide software and data
to reproduce our results.
