anchor.diff:      }
     }
   }
  -
  
positive.code:       table.clearLines(t);
      }
    }
    
    updateRanking({currentScore:null}) {
      if(currentScore == null) {
        currentScore = score;
  
negative.code:   int lastMoveTimeStamp = 0;
    int lastRotateTimeStamp = 0;
    int lastAutoDownTimeStamp = 0;
  
    List<int> ranking = [0,0,0];
  
    int get no1Score => (ranking.length >=3?ranking[2]:0);
  