Upgrade Peshk@ to Multiplatform

Upgrade Elementary Combinations to Multiplatform 5x
Levels 3 - 4 [Rating 1000-1400]; Tactics. Over 5000 exercises for beginners.

Upgrade Advanced Defense to Multiplatform 5x
Levels 3 - 5 [Rating 1000-1600]; Tactics. 400 exercises on piece protection and checkmate prevention.

Upgrade Easy Ways of Taking Pawns and Pieces to Multiplatform 5x
Level 1 [Rating 200-600]; Tactics. Over 5800 exercises will teach you not to miss capture opportunities and protect your own pieces.

Upgrade Chess Tactics for Beginners 2.0 to Multiplatform 5x
Levels 1 - 4 [Rating 200-1400]; Tactics. Over 2200 tactical exercises classified by theme and difficulty