Thanks Erick to answer your question "What is "Y"?" Score that we see in debug section actually looks correct and if we order documents by that score we can get similar ranking of results that we were getting for solr 6.4.2.
But With the score field that we get with each record it looks like boost queries are getting ignored (if there is more than one boost parameter to solr, for single boost parameter it works fine, is something broken here regarding multiple boost queries to solr) -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html
