Game 25, printed pages 34–35, from William Steinitz’s The Book of the Sixth American Chess Congress (1891).

1. 6…a6 Black clearly cannot afford this loss of time, which enables the adversary to block the QB. O—O is here the proper move. If White then play P—B5, Black may answer QKt—R4, followed by P—QB3 and P—Q4.
2. 8.Bb3 P—QR3, which Anderssen used to play in similar positions, is, we believe, stronger, as Black has nothing better than to exchange the Bishop, and the open Q file will add to White's advantage.
3. 14.b4 Preparing an attack in case Black should play O—O—O.
4. 14…Rd8 We think that Black would have been safer, nevertheless, with his King by O—O—O than on the other wing, where he is driven to take shelter subsequently. His Rook is also an obstruction now for his QB, which subsequently has to be posted at Q sq.
5. 18…Kh8 B—Q sq. at once, in order to release his Queen, was by far better.
6. 23.f6 Though this wins the exchange, 23 B—Kt5, 23 P—B3; 24 B—Q2, followed by R—KKt sq. and P—Kt5, was much more forcible.
7. 24…Qh6 This ingenious move, whereby Black escapes at the expense of the exchange from the pressure of an apparently irresistible attack against the King, was probably overlooked by White in his forecalculation on the 23d move.
8. 38.Rxg6 Winding up with irresistible power.
9. 40…Bxg7 There was no remedy, as Kt—R6 ch. was threatened.