00351nam a2200121 a 450000500170000002000180001708200160003510000200005124500610007126000380013230000250017050000340019520251203112241.0  a9788173715419  a793.74bWAT  aWatkins, John J  aAcross the boardbthe mathematics of chessboard problems  aChennaibUniversities Pressc2005  axii,257p.c20cm.bPB  aincludes references and index