eq { diff { hop { filter_eq { all_rows ; opponent ; eva dyrberg } ; date } ; hop { filter_eq { all_rows ; opponent ; anna smashnova } ; date } } ; -2 days } = true
select the rows whose opponent record fuzzily matches to eva dyrberg . take the date record of this row . select the rows whose opponent record fuzzily matches to anna smashnova . take the date record of this row . the second record is 2 days larger than the first record .