We invite you to the team of professionals! The advantages of the professional version: ♙ 100% Offline; ♙ No ADS; ♙ No coins; ♙ Full access to exercises and challenges; ♙ Unlimited access to the chessboard simulator. Functions and features: ♟ 2900 chess puzzles; ♟ Chess openings: the King's Gambit, the Queen's Gambit Accepted, the Pirc-Ufimtsev defence;
