A crossword position is a legal chess position with the following property: The board can be thought of as a crossword grid where the pieces on board work as clues. Each type of piece is a clue for their own name (
PAWN). That is, you can fill out the empty squares with letters corresponding to the pieces' names.
You do not need to be able to fill every square of the board – only all stretches of two or more letters directly to the right or below a piece. If a word can fit both down and across from the same clue, both have to be filled.
For example, the above is a simple crossword position. Note that neither of the bishops needs to clue the word
BISHOPbecause no word of at least 2 letters fits below or to the right of them.
In the following position, white to move (and black to help), reach a crossword position on white's third move.