// Download most-visited-square.cql
// PGN output when run on sample.pgn

Find games where some square has been visited at least 15 times, and sort the results
by the number of times visited.

cql(input heijden.pgn)
square VisitedSquare in .
 sort "max number of visits to a single square"
   find 15 1000
      move to VisitedSquare