1.d4 c6 2.c4 d5 3.e3 Unusual move order. 3...Nf6 4.Bd3 [More common is 4.Nf3 or; 4.Nc3] 4...e6 I play a semi-slav. Several tenable 4... options existed. I think most interesting is 4...e5 [4...e5 5.Nc3 e4 6.Bc2 Bd6 7.Nge2 0–0 8.Bd2 Nbd7 9.Ng3 Re8 10.Qe2 a6 from a game.; 4...Bg4 5.Ne2 (5.f3 Bh5 6.cxd5 cxd5 7.Qb3 Qc7 8.Nc3) 5...e6 6.Nbc3 Nbd7 7.0–0 Bd6 8.f3 Bh5 9.e4 dxe4 10.fxe4] 5.Nf3 Everything soon transposes into main lines. 5...dxc4 [5...Nbd7] 6.Bxc4 By far most common in this position is c5. 6...Be7 Not very ambitious [e.g. 6...c5 it seems this freeing pawn move is important in this type of position, even at the cost of a move 7.0–0 a6 8.Bb3 Nc6 9.Nc3 cxd4 10.exd4] 7.0–0 0–0 8.Nc3 Nbd7 [8...b5 9.Bd3 b4 10.Na4 Ba6 11.Ne5 Bxd3 12.Nxd3 Nbd7 13.Bd2 a5; 8...c5 9.dxc5 Bxc5 10.Qc2 Qc7] 9.Qe2 [9.e4 c5 10.dxc5 Bxc5 11.Qe2] 9...b6 This time, VERY unambitious. This shows a lack of confidence in this sort of position. [9...b5 suggests itself, and from a master game: 10.Bd3 b4 11.Ne4 c5 12.Nxf6+ Nxf6 13.dxc5 Bb7 14.e4 Now the game has transposed into a positon reached a couple of dozen times; I also prefer 9...c5 10.dxc5 Bxc5 11.e4 but white is still better] 10.Rd1 Bb7 11.e4 Re8 This really isn't the way to continue. I need to address the space problem, e.g. with 11...c5. [11...c5 12.Bg5 cxd4 13.Nxd4 Qe8 14.Bb5 a6 15.Bc6 Black's position is still unpleasant.] 12.e5 Definitely not the strongest continuation. Fritz drops the evaluation from about 0.8 to 0.3. [12.Bg5 Qc7 13.Rac1 Qb8 white is given a pawn advantage by fritz] 12...Nd5 13.Ne4 h6 14.Bd2 Not the most energetic continuation. [An (unforced) example line: 14.Ne1 Nf8 15.Qh5 Qd7 16.Rd3 Ng6 17.Rg3 a5 18.Rxg6! fxg6 19.Qxg6] 14...a5 15.Rac1 According to fritz, white has just a slight edge circa E0.3 15...Rc8 [an alternative: 15...a4 16.a3 Rc8 17.g4 f6 the computer takes a long time in such positions] 16.Bd3 Nb4 Fritz isn't keen on this at all. Partly due to specific lines, partly due to the knight being less strong here than central d5 maybe. [an alternative: 16...a4 17.Nc3 Nb4 18.Bb1 a3 19.bxa3 Nd5 White is still given a strong advantage. I have noticed the evaluation can shift unexpectedly in these late opening positions of the slav.] 17.Bb1 Understandable, but white just has a slight advantage with this. [17.Bxb4 This is a critical continuation. 17...Bxb4 18.Nfd2 f5 19.exf6 Nxf6 20.Nc4 white is given a big advantage] 17...Ba6 Logical continuation. 18.Qe3 [or 18.Qe1 ] 18...Nd5 19.Qe1 With this additional passive move, white has good as lost his advantage. 19.Qb3 was the active move. [19.Qb3 c5 20.dxc5 Nxc5 21.Nxc5 Bxc5 22.Be4 Retaining a slight advantage.] 19...Nb4 Fritz isn't impressed with this move. [19...a4 20.Nc3 a3 21.Nxd5 exd5 22.b4 The position is supposedly about equal. 22...Nf8 23.Qe3] 20.Bf4 Nd5 21.Bg3 c5 BAD. Looks good but fails under analysis. [21...Bb4 is good 22.Nfd2 a4 23.a3 Be7 DSB must stay on a3-f8 to counter Nd6] 22.Nc3 Not the critical continuation. [22.dxc5 Nxc5 23.Nd6 Bxd6 24.exd6 Qd7 the strongest continuation according to fritz 25.Ne5 Qb7 26.Qd2 Red8 27.Qd4 Be2 28.Re1 Bb5 29.Qg4] 22...Nxc3 23.bxc3 cxd4 24.cxd4 [fritz prefers 24.Nxd4 e.g. 24...Qc7 25.Qe4 Nf8 26.Qg4 Bc4 27.a4] 24...Rxc1 [alternatively 24...Bc4 25.Qe4 Nf8 26.Nd2 Bd5 27.Rxc8 Qxc8 28.Qg4 b5] 25.Rxc1 Bb4? This is a superficial, and after the queen moves, the bishop is offside on b4 compared to its original square e7, and also the white queen has moves to a better square. Therefore this is a positionally rubbish move. [25...Bb7 as my opponent suggested, reposting this bishop on this diagonal makes sense. This also prevents a Q-B battery byQe4] 26.Qe4 f5? This crude counter of the white Q-B battery probably objectively costs the game. Nf8 was the correct move. It is interesting that in only a slightly worse position, one poor positonal move leading to waste of time and misplacing of a piece is then immediately followed up by an outright positional blunder due to the pressure the initial bad positonal move put the black position under. Sensible defence was called for here and there would have been much better chances of a sober defence. [26...Nf8 27.Qg4 Bb7 28.Bd3 Qd7 29.Bh4 Rc8 The defence is quite successful and the black position is still intact.] 27.exf6 Nxf6 28.Qg6 Bb7 After this, white has a crushing position. The best attempt to hold the position was 28...Bd6 [28...Bd6 29.Ne5 Rf8 ...] 29.Ne5 This misses a killing continuation; Bh4 [29.Bh4 Bxf3 30.Bxf6 Qxf6 31.Qxe8+ Bf8 32.Rc7 (not 32.gxf3 Qg5+ 33.Kh1 Qxc1+) 32...Bd5 33.a4 e5 34.dxe5 Qe6 35.Qh5] 29...Rf8 30.Bf4 [30.Ng4 Qxd4 31.Nxf6+ Rxf6 32.Qh7+ Kf7 33.Rc7+ Ke8 34.Qg8+ Bf8 35.h4] 30...Qd5 [30...Qe8 this is much better, e.g.: 31.Qg3 Nh5 32.Qd3 Nf6 33.Bxh6 Qh5 34.Bf4 Nd5] 31.Bxh6 [31.Bd3 b5 32.a4 Qxg2+ 33.Qxg2 Bxg2 34.Kxg2 Nd5 35.Bg3 bxa4 36.Rc6 Re8] 31...Qxg2 + (DIAGRAM) initiates forcing sequence 32.Qxg2 Bxg2 33.Bxg7 Kxg7 34.Kxg2 I feel that in this ending, black has good hopes to hold if he plays well. [It would have been better to interpose 34.Rc7+ for example: 34...Kg8 35.Kxg2 Bd6 36.Rc6 Bxe5 37.dxe5 Nd5] 34...Bd6 Not the best. [34...Nd5 35.Be4 Rf4 36.Bxd5 exd5 37.Nc6 Bd6] 35.f3 Not the most direct continuation. [35.Rc6 Bxe5 36.dxe5 Nd5 Making use of the resource Rxd6?? Nf4+ 37.h4 (37.Rxe6?? Nf4+) 37...Nf4+ 38.Kf3 Nd3+ 39.Ke2 Nf4+ 40.Kd2] 35...Bxe5 It's worth ng that in this ending, both players only have a few minutes left to make a several moves. [35...Nd5 36.Be4 b5 37.Kf2 Bxe5 38.dxe5 b4 39.Bxd5 exd5 40.Ke3 Rh8 41.Rc2 Very bad rook ending for black.] 36.dxe5 Nd5 Not too bad. Importantly it also stops the invasion Rc7+ [36...Nd7 attacking e5 and maybe heading for c5, and also preventing Rc7+ 37.Re1 b5 38.Re4 b4 39.Rg4+ Kf7 40.f4 a4 Black is correctly using his pawn majority on the q-side for counterplay 41.h4 b3 42.h5 Rh8 43.axb3 axb3 44.Rh4] 37.Kf2 [37.Be4 A perfectly good alternative. The following example line shows how (without most accuracte play by each sides, but without obvious blunders) the position might be drawn. 37...Kf7 38.Rc6 Rg8+ 39.Kh1 Rd8 40.a4 Rb8 41.Rd6 b5 42.Rd7+ Kf8 43.Bxd5 exd5 44.Rxd5 b4 45.Rd2 Ke7 46.Kg2 b3 47.Rb2 Ke6 48.f4 Kf5 49.Kg3 Rg8+ 50.Kf2 Rb8 51.h4 Kxf4 52.e6 Rb7 53.e7 Rxe7 54.Rxb3 Re4 55.h5 Rxa4 56.h6 Ra2+ 57.Kg1 Kg4 58.Rb1 Rd2 59.h7 Rd8 60.Rb7 Kh5 61.Rd7 Rh8 62.Re7 Kg6 63.Ra7 Rxh7 64.Rxa5=] 37...Rf7 [37...Rh8 38.Kg3 Rg8 39.h4 Kf7+ 40.Kh2 Rh8 41.Kh3 Rg8 42.Rc2 (42.h5? Nf4+ 43.Kh4 Ng2+ repetition 44.Kh3 Nf4+ 45.Kh4 Ng2+ 46.Kh3 Nf4+ 47.Kh2 Nxh5) ] 38.Rg1+ [38.Rc6 Re7 39.a3 Kf7 40.Be4 Rd7 black doesn't really stand a chance 41.h4 Nf4 42.Kg3 Nd3 43.f4 Nc5 44.Bb1 Rd4 45.h5 Ra4 46.Bg6+ Ke7 47.h6] 38...Kf8 39.Rg6 Ke7 40.Bc2 [40.h4 Nc3 41.Bc2 Nxa2 42.Bb3 Nc1 43.Rxe6+ Kf8 44.Rxb6 Rf4 45.Bd5 Rxh4 46.Rf6+ Ke7 47.Rf7+ Kd8 48.Ke3+-] 40...b5 41.Bb3 Apprantly a blunder according to the rapid drop in evaluation from about E1.0 to E0.2 [41.Rh6 Nb4 42.Bb3 Nd3+ 43.Ke3 Nf4 44.a3 a4 45.Ba2 Rf5 46.Ke4 Rh5 47.Rxh5 Nxh5 48.Ke3+-] 41...Rh7 [41...Rf5 The key move. 42.Rg7+ Kf8 43.Rb7 b4 44.Rb5 Rxe5 45.Rxa5 Rh5 46.Kg1 Rf5 47.Rb5 Rxf3 48.Bxd5 exd5 49.Rxb4 White will have difficulty winning this ending/black has good chances of drawing this ending 49...Ra3 50.Rb2 Kg7 51.Kf2 d4 52.Ke1 Kg6 53.Rd2 Kf5 54.Rf2+ Ke4 55.Kd1 Rd3+ 56.Rd2 Rf3 57.Rg2 Rd3+ 58.Ke1 Rc3 59.Re2+ Kd3 60.Rd2+ Kc4 61.Rb2 Re3+ 62.Re2 Rc3 63.Kd2 Rf3 64.Ke1 Rc3 65.Kd1 Rf3 66.Kd2 Rf1 67.Re6 Rf2+ 68.Re2 Rf3 69.Re1 Rf2+ 70.Re2 Rf3= Draw by repitition. White was unable to make progress, (with his a2 and h2 pawns, maybe this made things particularly more awkward).] 42.Kg3 [42.Bxd5 exd5 43.Kg3 Rh8 44.f4 b4 45.Ra6 d4 46.f5 Rd8 47.f6+ Kf7+- Fritz says that white can easily win this.] 42...Ne3? An obvious blunder. From now on the position is unsalvagable. I think I was unaware that until this point I had good reason to play for a draw. Hereonin the evaluation is+-- [42...Nc7 43.h4 Kf7 44.Rg5 White still has some work to do. 44...Rh8 45.f4 a4 46.Bc2 Nd5 47.h5 Ke7 48.Kf3] 43.Rxe6+ Kd7 44.Rf6 [44.Rb6 is better, but this probably makes no difference 44...Nf5+ 45.Kg4 Ne7 46.Rxb5 Rxh2 47.Rxa5 Rg2+ 48.Kf4 Re2 49.e6+ Kc6 50.Ra7 Nc8 51.Rh7] 44...Nc4 45.f4 Rg7+ 46.Kf2 Ke7 Bad. [46...Rh7] 47.Rc6 [Marginally more punishing is: 47.Bxc4 bxc4 48.Rc6 Kd7 49.Rxc4 Rh7 50.Kg3] 47...Nd2 Very bad. These moves are more a case of hopeless moves in a hopeless position than blunders. [47...Kd7 48.Rc5 Rf7 49.Kf3] 48.Rc7+ Kf8 49.Rxg7 1–0
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