00323nam a2200133 a 450000500170000002000150001708200210003210000170005311000170007024500380008725000120012526000330013730000190017020251203091057.0  a0080302457  a794.124,bD, ave  aAverbakh, Y.  aClarke, P.H.  aChess ending: essential knowledge  a2nd ed.  aOxfordbPergamon Pressc1987  axiv, 97p, 23cm