$ jq -nc -f ./queens.jq
["a1","b7","c5","d8","e2","f4","g6","h3"]
["a1","b7","c4","d6","e8","f2","g5","h3"]
["a6","b1","c5","d2","e8","f3","g7","h4"]
["a4","b1","c5","d8","e2","f7","g3","h6"]
["a5","b1","c8","d4","e2","f7","g3","h6"]
["a3","b1","c7","d5","e8","f2","g4","h6"]
["a5","b1","c4","d6","e8","f2","g7","h3"]
["a7","b1","c3","d8","e6","f4","g2","h5"]
["a5","b1","c8","d6","e3","f7","g2","h4"]
["a5","b3","c1","d7","e2","f8","g6","h4"]
["a5","b7","c1","d4","e2","f8","g6","h3"]
["a6","b3","c1","d8","e4","f2","g7","h5"]