About: http://webisa.webdatacommons.org/132497425

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	The shading is not essential to the solution, except insofar as it helps the grid mirror an actual chessboard and helps solvers stay oriented.
http://www.w3.org/ns/prov#wasQuotedFrom	puzzlers.org