Chess Middlegame Collection 2013 is a set of six unique chess courses. Five courses on the middlegame (Encyclopedia of Middlegame, volumes I-V) cover the theory and practice of the middlegame for each of the openings. The sixth course, Chess Strategy, explores 18 strategic motifs (Weak squares, Pawn structure etc.) and typical structures (Isolated pawn, Hanging pawns etc.).Each of the six courses contains rich theoretical material for the corresponding openings and variations, and positions to solve. In total, the Chess Middlegame Collection 2013 includes more than 3000 games/lectures prepared by GM Alexander Kalinin and more than 4000 exercises to solve.