May-24-10
 | | Pawn and Two: This game was played in the 10th round, the half-way point of the tournament. After round 10, Tarrasch was in 1st place with 7 points, and Schlechter was 2nd with 6 points. At the tournament's conclusion, Tarrasch was 1st with 12 1/2 points, Schlechter was 2nd with 12 points, and Janowski and Marshall were 3rd/4th with 11 1/2 points. A critical point in the game was reached after 22...Bg7:  click for larger viewAt this point in the game, Schlechter had strong winning chances. Leopold Hoffer suggested, that instead of 23.Nf3, Schlechter should have played 23.Bc3, to be followed by Qf3, after which he suggests, Tarrasch could not have conscientiously offered the draw. In the tournament book, Tarrasch recommended the following line: 23.Bc3 Nb7 24.Qf3 Rab8 25.Qc6 Nf8 26.Qc7. Fritz verifies this line is winning for White. At move 23, Fritz indicates the following continuation was best: (1.98) (21 ply), 23.c5! Bf6 24.c6 Nf8, (2.79) (20 ply), 25.d5 Qg7 26.Bxf6 Qxf6 27.c7 h6 28.Nf3 exd5 29.Nxd5, and White is winning. White also had good winning chances with: (1.61) (21 ply), 23.Bc3 Qh5 24.Qxh5 gxh5 25.Bxa5 bxa5 26.c5, (1.60) (21 ply), 26...Rab8 27.Nc4 h6 28.Nf3 Rb3 29.Kg2 Nf6 30.Rfe1 Nd5 31.Rd2 a4 32.Nd6, (1.70) (21 ply), 32...Re7 33.Rde2 Rxa3 34.Nxf5 exf5 35.Rxe7 Nxe7 36.Rxe7, (2.24) (21 ply), 36...a5 37.Ra7 Rc3 38.Rxa5 a3 39.Ne5, and White is winning this ending. Due to the length of this variation, it is likely some improvements can be found for both sides. After Schlechter played 23.Nf3?, his winning chances were greatly reduced. At 20 ply, Fritz indicated Black's best response to 23.Nf3 was 23...Nf6, with good chances to hold the position: (.45) (20 ply), 24.Ne5 Ne4 25.d5 Bxe5 26.fxe5 Nb3. Another line is: 23.Nf3 Nf6 24.c5 bxc5 25.Ng5, (.40) (22 ply), 25...Nb3 26.Qc4 Nxd4 27.Qxc5 Ne2+. In the tournament book, Tarrasch indicated that after Schlechter erred with 23.Nf3, the position was about equal, <"ausgeglichener Stellung">. As noted in my last paragraph, Fritz indicates after 23.Nf3? Nf6, Black would have had good drawing chances. However, Tarrasch then goes on to say, that after 23.Nf3?, Black could have secured his position, <"das schwarze Spiel ist weider gesichert">, by playing 23...Bf6 and next Qg7. Had the game continued, and Tarrasch played 23...Bf6, Fritz indicates White would have had the advantage: 23.Nf3 Bf6, (1.06) (21 ply), 24.Bc3 Nc6 25.Qc2 Rac8 26.Qb3 Qg7 27.Rd3 Qe7. Additional anaylsis of this last variation is needed to determine White's winning chances after 23.Nf3 Bf6. |