17.Qa6?? Also, why not Qc2? Another mate ensues! Paulsen vs Morphy, 1857   (C48) Four Knights, 28 moves, 0-1 25...Nf4+?? LSB misplaced in book, 24.Bb3 v Bd3 Blackburne vs J Schwarz, 1881  (C01) French, Exchange, 28 moves, 1-0 20...Nd7?? Rubinstein vs M Hirschbein, 1927  (D63) Queen's Gambit Declined, Orthodox Defense, 23 moves, 1-0 35.?? Vidmar vs Euwe, 1929  (A48) King's Indian, 37 moves, 1-0 23...Kxg7?? Ragozin vs Veresov, 1945  (B74) Sicilian, Dragon, Classical, 35 moves, 1-0 5 games