Pawn and Two: As noted by CambridgeSprings1904, this was a consultation game by 8 masters, Lasker, Chigorin, Marshall & Teichmann vs Schlechter, Janowski, Lawrence & Marco. The game was played aboard the Hamburg-American Liner "Pretoria", enroute to the 1904 Cambridge Springs tournament.In the Rice Gambit, MCO 10 shows 10...Nh5 11.d4 Nd7 to be the main line, tending to favor Black.
Fritz 9 indicates that Black gave up most of his advantage with 10...Bf5.
Instead of 10...Bf5 or 10...Nh5, Fritz suggested 10...f3 11.d4 Ne4 12.Rxe4 Bh2+ 13.Kxh2 Qxe4 as better for Black.
In the main MCO line, Fritz suggested 10...Nh5 11.d4 0-0, and after 12.Rxe5 Qxh4 13.Rxh5 Qxh4 14.Bxf4 c6 15.dxc6 Nxc6, Black has some advantage.
Instead of 12.dxe5, Fritz indicates 12.Bxf4 as best and White then has only a minimal disadvantage.
At move 17, Black could have clinched the win with 17...Ng3 18.Qxf4 Be4 19.Qh6 Ne2+ 20.Bxe2 Qxe1.
As pointed out by DWINS, Black also has a win at move 18 with 18...Rd5! 19.Nd2 Qh2+ 20.Kf1 c5 21.Nf3 Qh1+ 22.Ng1 f3, and Black wins. Black could also play 18...Qh2+ first and then 19...Rd5 winning.
At move 19, Black could play for a draw with 19...Qh2+ 20.Kf1 Qh1+ 21.Qg1 Qh4 22.Qa7 Qh1+. If in this line White plays 21.Nf3, then 21...Rxf3! 22.gxf3 b5! and Black has the advantage.
Al Horowitz once suggested that Black could win by playing 19...Qh2+ 20.Kf1 Re3. If now, 21.Rxe3 fxe3 22.Qxe3? Rd8! and Black has considerable advantage. Fritz evaluates this position as (-2.25) (18 ply) and gives the following continuation: 23.b3 Kb8 24.Ba3 Bh3! 25.Bc5 Qxg2+ or in another continuation, (-2.10) (18 ply) 23.Ke1 Qxg2 24.Qf3 Re8+ 25.Kd1 Qxf3+. However, White can obtain a draw in this line by: 19...Qh2+ 20 Kf1 Re3 21.Rxe3 fxe3 22.Qa8+ Kd7 23.Qxh8 Qh1+.
Black's 36th move is a serious mistake, but even after 36...Nf4 37.Rf1 Qxe2+ 38.Qxe2 Nxe2 39.Kxe2, White will win the ending.
sac: 8.O-O
e7+. 
