Morphy against Frederick Perrin, New York 1857 — a Sicilian Opening. Black's loss of time with the King's Knight tells, and Morphy works up a winning King's-side attack. Notes by Löwenthal.
5.Be3Kt. to Kt's 5th is now considered the best move at this juncture.
9…Ne5A sad loss of time, P. to Q's 4th, at once, would have been far better.
19.Bxf5Was any real danger to be apprehended from the capture of the B.?
23.Qh5+A diagram of the position is given to enable such students as may wish to do so, to work out the termination of the game, without recourse to the actual moves.
23…Kd7If K. to K's 2nd, the loss of the Queen would have followed on the move; and if to B's sq., White would have equally won with ease.
J. Löwenthal, Morphy's Games of Chess (1860) · Public domain · source