There are several variations of this story. Here is a very detailed one:
A master chess champion was walking through an art gallery and came across a painting that fascinated him. It was the painting of a young man sitting at a table playing a game of chess with the devil. There was a look of glee on the face of the enemy and of panic on the face of the young man. The name of the painting was “checkmate.” As the master chess champion observed the painting, he felt uncomfortable. He was a master chess champion and there was something about the painting that just wasn’t right. He called for the curator of the gallery and told him to take the painting down. When that didn’t work he demanded to meet the artist. That was arranged and the meeting took place. The master chess champion arrived at the meeting with a chessboard and the chess pieces. He set the board up exactly as the artist had arranged it in the painting and said, “There is something wrong with your painting.” When the artist inquired as to what that might be, the master chess champion stated, “You have entitled the painting “Checkmate,” but that implies that the young man has no more moves to make.” The chess champion reached over to the board and moved the young man’s king one space and said, “The devil is now checkmated. When the king has one more move, the game isn’t over”.
Here is a depiction… Artist Bill Stephens