Old Benoni Structure Harrwitz vs Morphy, 1858   (A84) Dutch, 54 moves, 0-1 Elementary Harrwitz vs Morphy, 1858  (A84) Dutch, 54 moves, 0-1 Double Dutch A Mongredien vs Morphy, 1859  (A84) Dutch, 50 moves, 0-1 3 games