TacBase Vol. 1 Chess Tactics Trainer Included on this disc TacBase Tactical Database with 750 puzzles Fundamental Elements Of Chess Tactics By GrandMaster Varuzhan Akobian Winboard 4.7 Game Viewer Crafty 19.3 Chess Playing Program No additional software is required, however TacBase works with Fritz ChessBase, ChessBase Lite FREE download Chess Partner, Chess Assistant Shredder Arena and others