A preprint of an ECIR2020 paper by Chris Kamphuis, Arjen de Vries, Leonid Boytsov and Jimmy Lin caught my eye recently as it reports on an investigation of eight variants of the BM25 scoring function. BM25 is where information retrieval meets search, as most search vendors will claim they are using BM25 but will never… Continue reading BM25 – the magic dust of search?