Chess Opening Blunders is an educational program designed to help players learn from the common mistakes and traps in over 40 chess openings. Developed by CHESSQUEEN INC, this program is part of the Chess King Learn series, a comprehensive chess teaching method that covers tactics, strategy, openings, middle game, and endgame.

With over 1,250 instructive exercises of varying difficulty, Chess Opening Blunders allows players to improve their chess knowledge and learn new tactical tricks and combinations. The program acts as a coach, providing tasks to solve and offering hints, explanations, and refutations of mistakes made.

The program features high-quality examples that have been double-checked for correctness. It requires players to enter all key moves as instructed and offers different levels of complexity for the tasks. Additionally, the program includes interactive theoretical lessons, a structured table of contents, and a test mode with flexible settings.

Chess Opening Blunders is an offline application that does not require an internet connection. It also allows players to bookmark favorite exercises and play out any position against the computer. The program even monitors the player's rating (ELO) during the learning process.

Overall, Chess Opening Blunders is a valuable resource for chess players of all levels who want to enhance their opening knowledge and avoid common mistakes.