rook-corners-rotate-with-range.cql

; rook-corners-rotate-with-range.cql can be downloaded here.

; look for rook visiting the four corners
; This uses rotate with a range to find games where a rook visits all corners

cql( input heijden.pgn )
initial
 piece $rook in R
  rotate90 4
    next* $rook on a1