Check

In chess, check is a condition that occurs when a player’s king is under threat of capture on the opponent’s next turn. When a king is attacked, it is called check (written as “+” in chess notation). Check can be viewed as saying “Watch out! The king is attacked!” Since a king can never be captured, the term “check” is used when a king is threatened.

If a player’s king is under attack, they are said to be in check and must get out of check on their next move.

There are many famous checks in chess, but some of the most notable include the “Opera Game” between Paul Morphy and Duke Karl of Brunswick and Count Isouard in 1858, the “Immortal Game” between Adolf Anderssen and Lionel Kieseritzky in 1851, and the “Evergreen Game” between Adolf Anderssen and Jean Dufresne in 1852.