Learn Chess Tactics - John Nunn - Bog

This book teaches basic tactical ideas such as the fork, pin, and discovered attack, and introduces general ideas such as elimination, immobilization and compulsion. A basic knowledge of simple tactics will enable a novice to start winning games, by giving checkmate or capturing material. As the player progresses, his tactical arsenal will broaden, and he will start to play sacrifices and combinations, and develop a deeper understanding of the game. Players who fail to study tactics systematically tend to suffer from tactical blind-spots that plague them throughout their playing career, and thus they fail to realize their full potential.