Сhess - tactics and strategy is a chess training program available on Android platform. The program offers a comprehensive training experience, including chess puzzles, tactics, openings, endings, playing with computer and computer analysis.

The program has a demo version available for free with certain limitations. The demo version displays registration messages, can only open demo training databases and all opening books are limited to the first three moves. However, users can register the program by clicking the "Buy" button of the nag screen or through other payment options available on the developer's website.

The program's website also provides additional chess training materials, including tactics, endings, and classic games. For any questions or concerns, users can contact the developer through the contact page on their website. Overall, Сhess - tactics and strategy is a promising chess training program for those looking to improve their chess skills.