less { hop { filter_eq { all_rows ; tournament ; christchurch , new zealand } ; year } ; hop { filter_eq { all_rows ; tournament ; gstaad , switzerland } ; year } } = true
select the rows whose tournament record fuzzily matches to christchurch , new zealand . take the year record of this row . select the rows whose tournament record fuzzily matches to gstaad , switzerland . take the year record of this row . the first record is less than the second record .