Game 104 in Wilhelm Steinitz’s The Book of the Sixth American Chess Congress (1891), printed pages 136–137.

1. 7…d6 In the present new variation Black ought not to maintain his Pawn plus with great comfort, and the line of play adopted by Mr. Gunsberg against Mr. Burn in the same form of opening, viz.: 7...Kt—Q3, is preferable.
2. 9.Re1 By far more promising appears to us the continuation 9 KtxKt, 9 PxKt; 10 Q—K2, 10 B—Q3; 11 P—KB4, 11 P—KB3 (or 11...Q—K2; 12 PxP, 12 QxP; 13 QxQ, 13 BxQ; 14 R—K sq., 14 P—KB3; 15 B—B4, recovering the Pawn, with the superior game); 12 Q—R5 ch., 12 P—Kt3; 13 Q—R6, etc.
3. 10.Ra4 10 KtxKt, 10 BxQ; 11 Kt—B6 disch., 11 B—K2; 12 KtxQ, 12 BxP, would only increase Black's advantage.
4. 11…O-O 11...P—QB3; 12 PxP, 12 PxP; 13 B—B4, 13 KtxB ch.; 14 PxKt, 14 B—K3 was, we think, the simplest way of maintaining his advantage, whereas much trouble is now caused by the adverse Knight.
5. 17.Nxc7 We cannot help opining that this clever coup had not been sufficiently taken into account by his opponent, for it seems to us sound if only rightly continued.
6. 19.Rc4 At this critical juncture White spoils a game that had been creditably conducted on his part, considering especially that he had been fighting against a great master, and that he had sacrificed a Pawn in the opening. The right play in this rarely interesting and instructive position was 19 R—Kt3, 19 R—B sq. (19...P—R5; 20 R—Kt2, 20 P—R6; 21 R—Kt3 leads only to a line of play similar to that of our main variation, without any difference in Black's favor, for the main point is that White should keep up the attack against the Bishop, which cannot be easily defended if Black wish to gain the Knight); 20 QxP, 20 P—B3; 21 Q—K8 ch., 21 QxQ; 22 KtxQ, 22 R—Q7 (or 22...R—Q2; 23 P—KB4, and, obviously, if BxP, White wins by KtxBP ch.); 23 KtxKtP, 23 KxKt; 24 P—KB4, with at least an even game. The move in the text loses.
7. 20.Qxe5 He might have saved the piece by 20 P—Kt6, 20 RxP; 21 Kt—Kt5, 21 RxR (of course, not 21...RxKt, on account of 22 RxR, followed by QxR); 22 QxR, but then Black's attack by R—KKt3 or B—B5 would have been irresistible, besides that he remained with two Pawns ahead.
8. 22…Bxd8 In the hands of a master like Mr. Gunsberg a piece was sure to win in the ending, and the game requires no further comment, though the further play will be interesting to students who are not experts.