chessGMSacrifices around the king is lesson 2 of 7 in Sacrifices on the king, a tactics course suited to players rated around 1200 (improving players). When the king's shelter is thin, a piece sacrifice next to it can decide the game. Count the attackers that follow up before you let the piece go. It has 9 interactive exercises: 9 calculated lines from real positions. You play every move on a board and get feedback straight away. The lesson is free.