/**
  Class containing Statistics for a particular search.
 */
public class Statistics {

  public long start_time;
  public int node_count, failed_high, failed_high_first, failed_low,
              null_moves,hash_cutoff;

  public void reset() 
  {
     node_count = 0;
     failed_high = 0;
     failed_high_first = 0;
     failed_low  = 0;
     null_moves  = 0;
     hash_cutoff = 0;
     start_time = 0;
  }

  public String string()
  {
     return " n=" + node_count + 
            " nps=" + node_count*1000/(System.currentTimeMillis() - start_time) +
            " fh=" + failed_high +
            " ff=" + failed_high_first + 
            " " + (100*failed_high_first/(failed_high+1)) + "%" +
            " fl=" + failed_low +
            " nm=" + null_moves +
            " hc=" + hash_cutoff;
  }

}