What is Blindfold Chess?

Blindfold chess is a form of chess in which one or both players play without seeing the board, relying entirely on memory and visualisation. The blindfolded player is told the opponent's moves and announces their own moves using algebraic notation. Blindfold simultaneous exhibitions—where a single player takes on multiple opponents without sight of any board—are among the most impressive demonstrations of chess skill. Notable blindfold experts include Harry Nelson Pillsbury, Alexander Alekhine, Miguel Najdorf (who played 45 boards simultaneously blindfolded in 1947), and Timur Gareyev.