Upgrade Peshk@ to Multiplatform

Upgrade Simple Defense to Multiplatform 5x
Level 2 [Rating 600-1000], Tactics. Over 3000 exercises with many pieces on the board.

Upgrade Training Package for Beginners to Multiplatform 5x
Training Package for Beginners includes huge carefully selected material to improve the skill level of newer players.

Upgrade CT-ART for Beginners to Multiplatform 5x
Level 5 [Rating 1400-1600]; Tactics. 150 examples and 1500 exercises on more than 30 tactical methods and motifs.

Upgrade Total Chess Tactics to Multiplatform 5x
Total Chess Tactics package consist of 3 products: Chess Tactics level 1, 2 and Chess Tactics level 3.