Find chess positions with a white rook on e1 commanding a fully open e-file. Real Lichess games where the rook has a completely clear file ahead.
A rook on an open file is one of the fundamental advantages in chess strategy. When a rook has no pawns blocking its file, it can penetrate into the opponent's position, control key squares, and support the advance of passed pawns. This search finds positions in the middlegame and endgame where a rook commands a completely clear file from the 1st rank.