Chess Middlegame IV course composed by GM Alexander Kalinin is aimed at teaching a student much of the middlegame methods and intricacies through a theoretical section. This course includes 560 teaching examples and 530 exercises for 1800-2400 ELO: Ruy Lopez, two Knights' defense, French defense, Sicilian defense, Caro-Kann defense, King's indian defense, Nimzo-indian defense, English opening etc. This course is in the series Chess King Learn (https://learn.chessking.com/), which is an unpreced