Zen Chess: Mate in Four is a minimalist chess puzzle game. Features: Designed for chess lovers of all levels (even if you just learned how to move the pieces); Solve 50 carefully selected mate-in-four puzzles; Enjoy a minimalist, beautifully designed chess board and pieces; Original soundtrack, specially composed to help you keep your focus and concentration; Everything in the game was made with a lot of love and craftsmanship; Can you find the four moves that will solve each puzzle? Give it a try and show yourself you are a truly chess master.

Go to: http://store.steampowered.com/ and download STEAM client Click "Install Steam" (from the upper right corner) Install and start application, login with your Account name and Password (create one if you don't have). Please follow these instructions to activate a new retail purchase on Steam: Launch Steam and log into your Steam account. Click the Games Menu. Choose Activate a Product on Steam... Follow the onscreen instructions to complete the process. After successful code verification go to the "LIBRARY" tab and start downloading.