Game V of the even-terms Morphy–Paulsen match (First American Chess Congress, New York 1857) — a Sicilian Opening, Morphy (White) winning. Notes from the 'Book of the First American Chess Congress,' with the Editor's additions.
6…Nf6If he had played 6. K. B. takes Q's B., White would have obtained a good game by 7. K. Kt. to Q's 6th (ch.).
13…g5Black's proper course undoubtedly is to commence an attack on the castled King.
17…Ne5Instead of this, which strengthens White's game, we should have preferred playing Kt. to K. Kt's 4th, or P. to Q. Kt's 4th.
19.Qd2We should have preferred 19. Kt. to R's 4th.
24…Qxf4Black would have done badly now, it appears, to double his Rooks on the K. Kt's file; for suppose— 24. Q. R. to K. Kt's sq. 25. Q. takes Q. 25. R. takes Q. 26. Q. R. to K. B's sq. 26. K. R. to K. Kt's 3rd 27. P. to K's 5th 27. Kt. to R's 4th 28. R. takes P. (ch.) &c. Instead of exchanging Queens, however, we should have preferred playing 24. P. to K's 4th, with the view of getting the Pawns on Black's squares, after which the Kt. would have been more valuable than White's Bishop.
26.Rd2Much better than 26. K. R. to B's 2nd, since this forces him to defend his K. R's P. disadvantageously.
28.Rd4His best move.
30.Rc4If 30. B. to Q. Kt's 5th, Black would simply advance 30. P. to Q's 4th.
37.Kh2Black's centre Pawns are so strongly guarded that it was not possible, with the forces now in action, to make any impression upon his position. It was necessary, therefore, to make the K. and K. R's P. operative.
43…Kg7He would have avoided the loss of a P. by playing his K. to B's sq.
50…b5This Pawn cannot be rescued. If— 50. R. to B's 3rd 51. P. to R's 5th 51. P. takes P. 52. R. takes R. 52. K. takes R. 53. P. takes P., and wins easily.
53.c4Much better, of course, than taking the Pawn.
60…Rh1The advance of the Pawn would amount to nothing.
62.c7By the accompanying diagram the reader will see that the march of the Pawns cannot be arrested.
J. Löwenthal, Morphy's Games of Chess (1860) · Public domain · source