About: http://webisa.webdatacommons.org/271591486

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Players (amateurs anyway) do indeed play moves other than 3. d4, but his point is sound: there are only a handful of variations of moves white has after 2??? d6.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.co.uk