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22:00Weak Squares | Part I | Chess Strategy | Chess Middlegame | IM Alex AstanehWeak Squares | Part I | Chess Strategy | Chess Middlegame | IM Alex AstanehChessfactorintermediate10:18Weak Squares | Part II | Chess Strategy | Chess Middlegame | IM Alex AstanehWeak Squares | Part II | Chess Strategy | Chess Middlegame | IM Alex AstanehChessfactorintermediate