even custom  VLSI  chips, allowing higher price/performance ratios by sacrificing generality. Examples of special-purpose supercomputers include  Belle , [33]   Deep Blue , [34]  and  Hydra , [35]  for playing  chess ,  Gravity Pipe  for astrophysics, [36] MDGRAPE-3  for protein structure computation molecular dynamics [37]  and  Deep Crack , [38]  for