Excelsior

The Excelsior theme shows a pawn's complete journey from its starting row to the far end of the board. A White pawn must begin on the second row and a Black pawn on the seventh. During the solution it advances, and may capture if its route requires it, until it reaches the last row and promotes.

Promotion replaces the pawn with a queen, rook, bishop, or knight of the same color. The composition determines which piece is needed; an Excelsior does not require promotion to a queen. The pawn's journey, rather than only the final move, must be a recognizable part of the idea.

Not every promotion is an Excelsior. If the pawn is already advanced in the diagram, a later promotion lacks the full journey from its original row. The theme can occur in studies, compositions that ask White to prove a win or a draw, and in other problem types because it describes a route rather than one particular goal.