Karpova: This game was played on board 3 of the 3rd Netherlands versus Lower Rhine Region match in Krefeld. Black's name is given as <H. Thomas>.Annotations by W Therkatz from the 'Krefelder Zeitung' of October 21, 1911 (condensed):
6.d3 <For the exchange variation see Nimzowitsch vs Leonhardt, 1911>.
7.Bg5 <White preserved the advantage of the first move. This move is currently believed to be the strongest attacking continuation, just like in main variation of the French and the QGD.>
7...Bxc3 <Played by Pillsbury in the play-off against Tarrasch at Vienna 1898, is currently questioned. The ♗ can be useful for Black in a later castling attack of the White King's side ♙s (Rochadeangriffe der weißen Königsbauern). The question whether Black can keep up the symmetry with 7...Bg4 is interesting. Black had no success with this in Schlechter vs Leonhardt, 1910. A satisfying is yet not clearly demonstrable, also the answer 7...Ne7, which was so popular in the St.Petersburg tournament appears shaken, see Schlechter vs Duras, 1911>.
8...Bg4 <Better is 8...Bd7 as in Schlechter vs Teichmann, 1910, while the once highly regarded 8...Qe7 was hit by the variation as in Spielmann vs Rubinstein, 1911>.
9...Bd7 <Incorrect would be (after prior different move order) 9...h6? 10.Bxf6 Bxf3 11.Bxd8 Bxd1 12.Bxc7 Bxc2 13.Rfc1 Rac8 14.Bxd6 Rfd8 15.Bxc6 Rxd6 16.Rxc2 Rdxc6 17.Rd1 and wins as in Barasz-Domberger, Hamburger Hauptturnier 1910.> The game is not in the database and there is a typo as 13...Rfc8 and 14...Rfd8 are given, so it's not clear if it was actually 13...Rfc8 14...Rcd8 or 13...Rac8 14...Rfd8.
10.Rb1 <As played by Schlechter. Also possible is 10.Qd2 h6 11.Bxf6
Qxf6 12.Ne1 g5! and so on (Bergmann-Dimer, Hamburg 1911).> Another typo as the line is given as 9.Qd2 h6 10.Bxf6 and so on.
10...Rb8 <? Teichmann ignored the threatening White ♖ move in the Hamburg game (see note to move 8) and tried to speed up his development with ...Qe7, using the Queen's ♖ on the King's file. The text move has the other drawback of taking away a possibly important flight square from the ♘c6.>
12...gxf6 <The ♙ has to retake as 12...Qxf6? 14.d5 winning a piece. If b8 was free, 13...Nb8 could be played.>
14.d5 <!>
14...f5 <Black has no choice as 14...Nd8 15.Bxd7 Qxd7 16.Nf5 Kh7 17.Qh5 is decisive.>
15.dxc6 <? It appears that 15.Qh5! is the fastest way to win as it protects the attacked ♘ and keeps up the threat to win a piece, e. g. 15.Qh5! Nd8 16.Bxd7 Qxd7 17.Nxf5
f6 18.Qg6+ Kh8 19.Qxh6+ Kg8 20.f4 and wins. If Black tries to sacrifice a piece, e. g. 15...fxe4 then 16.Qxh6! is a good answer, e. g. 16...Nd8 17.Bxd7 Qxd7 18.Qg5+ Kh7! 19.Qf6! Rg8! 20.Nf5 Rg6 21.Qh4+ Kg8 22.Ne7+ Kg7 23.Nxg6 fxg6 24.f4! and wins. If Black brings about the ♕ trade 15.Qh5 Qg5 16.Qxg5+ hxg5 then simply 17.Nf3 and wins.>
31.Rb5 <!>
31...Qxd3 <Here Black could try 31...e4 and if 32.Qxe4 Qxe4 33.Nf6+ Kg6 34.Nxe4 Rxc4 followed by Rxc2, but White would answer 32.Qd4. After the ♕ trade, a winning endgame for White follows, which he conducts with masterly precision.>
Source: Pages 65-66 of the February-March 1912 'Wiener Schachzeitung'