There is no better way to improve your tactical ability than by working out winning combinations in positions taken from Grandmaster games. In this final - and most challenging - part of his best-selling three volume course in chess tactics, Russian chess teacher Livshitz provides a wealth of test-yourself positions identified under recurring combinational themes such as diversion, interference, X-ray attack and many more Solving these positions will stretch your imagination to the full and enable you to test and assess your Chess IQ.