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Radoslaw Wojtaszek vs Liviu-Dieter Nisipeanu
Dortmund Sparkassen (2017), Dortmund GER, rd 7, Jul-23
Nimzo-Indian Defense: Classical Variation (E32)  ·  1-0



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Premium Chessgames Member
  patzer2: Below is some analysis with Stockfish 8 (copy and paste to Stockfish 8 to view):

[Event "Dortmund"]
[Site "Dortmund GER"]
[Date "2017.07.23"]
[Round "7"]
[White "Radoslaw Wojtaszek"]
[Black "Liviu Dieter Nisipeanu"]
[Result "1-0"]
[WhiteElo "2736"]
[BlackElo "2683"]
[ECO "E32"]
[EventDate "2017.07.15"]
[PlyCount "81"]

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 d6
The popular reply for ♗lack is
( 4...O-O $10 as in the hard fought draw ♘isipeanu vs ♔ramnik Jul 19, 2017. ) 5.Bd2
This takes the game quickly off the beaten path with only 15 Master level games in the opening explorer with this line. 5...Nc6 6.Nf3 O-O 7.a3 Bxc3 8.Bxc3 Qe7 9.e3 a5 10.Be2 e5 11.dxe5 dxe5 12.h3 Rd8 With this quiet and sensible move, the game enters previously unexplored territory. 13.O-O e4 14.Nd4 Nxd4 15.Bxd4 c5 16.Bc3 a4 17.f4 Bd7 18.f5 Bc6 19.Rf4 Rd6 20.Raf1 Rad8 $2 This not so obvious mistake gives White a strong advantage. ♗etter instead are ( [Stockfish 8 64] 33:+0.00 20...Nd7 21.f6 Nxf6 22.Rf5 Re6 23.R1f4 Rf8 24.Bxf6 Rxf6 25.Rxf6 gxf6 26.Bf1 Kg7 27.Qf2 Rg8 28.Be2 Bd7 29.Bg4 Bxg4 30.Rxg4+ Kh8 31.Rxg8+ Kxg8 32.Qg3+ Kf8 33.Qb8+ Kg7 34.Qg3+ Kf8 or ) ( [Stockfish 8 64] 33:+0.00 20...Rf8 21.Rd1 Rxd1+ 22.Bxd1 Ne8 23.f6 Nxf6 24.Bxf6 gxf6 25.Qf2 Rd8 26.Bc2 Kg7 27.Qg3+ Kf8 28.Qh4 Rd2 29.Bxe4 Rd1+ 30.Kf2 Qd6 31.Bxc6 Rd2+ 32.Ke1 Rd1+ 33.Ke2 Rd2+ 34.Ke1 ) 21.Qc1 $1 $18 Nd7 22.f6 Nxf6 23.Qe1 $1 $16
(+1.18 @ 34 depth) This subtle move wins a pawn. Afterwards, White's advantages gradually increases, until it becomes decisive. There may be a saving move, but if it's there it's difficult to find even with deep computer alaysis. 23...Ne8
This gives White a near immediate decisive advantage. If ♗lack's game can be saved, an improvement will be need to found following the Stockfish 8 recommendation ( 23...Re6 when White secures a decisive advantage after 24.Qg3 Qc7 25.Qg5 h6 26.Qh4 Rdd6 27.Bxf6 Rxf6 28.Rxf6 Rxf6 29.Rxf6 gxf6 30.Qxf6 Bd7 31.Qxh6 Qe5 32.Qb6 Bc6 33.Qd8+ Kg7 34.Bg4 b5 35.cxb5 Bxb5 36.Qh4 c4 37.Qf2 c3 38.bxc3 Bd3 39.Bd7 Qxc3 40.Qg3+ Kf8 41.Qd6+ Kg8 42.Bxa4 $18 (+3.64 @ 36 depth) ) 24.Rxf7 $18
(+2.40 @ 29 depth)

25.Rxf7 Kxf7 26.Qg3 Nf6 27.Qe5 Rd2
This appears to be desperate, but everything else is losing at this point. For example, quiet resistance with ( 27...b6 fails to 28.g4 h6 29.h4 Ne8 30.g5 Re6 31.Qf5+ Ke7 32.Bg4 Rdd6 33.Qh7 hxg5 34.Bxg7 gxh4 35.Bh6+ Kd8 36.Bg5+ Kc8 37.Qa7 Bb7 38.Bf4 Nf6 39.Bxe6+ Rxe6 40.Qb8+ Kd7 41.Qxb7+ Ke8 42.Bg5 $18 (+14.02 @ 28 depth) ) 28.Bxd2 Rxd2 29.Kf1 Rc2 30.Ke1 Rc1+ 31.Kd2 Rg1 32.g4 h6 33.h4 g5 34.hxg5 hxg5 35.Qxg5 Bd7 36.Qxc5 Bxg4 37.Bxg4 Rxg4 38.Qc7+ Ke6 39.Qxb7 Rg2+ 40.Kc3 Re2 41.Qc8+ ♗lack resigns in lieu of
41...Kf7 42.Qc5 Rg2 43.Qa7+ Kg6 44.c5 Kf5 45.c6 Rg8 46.c7 Rc8 47.Kd4 Ne8 48.Qb7 Nd6 49.Qd5+ Kg4 50.Qxd6 $18 with mate-in-eigh to follow.

Premium Chessgames Member
  patzer2: patzer2: Black's game takes a turn for the worse after the not so obvious positional error 20...Rad8? allowing 21. Qc1! to . Instead, Black can hold it level with either 20...Nd7 = or 20...Rf8=.

After 23. Qe1! to it is difficult if not impossible for Black to prevent White's advantage from becoming decisive. The pin on the f6 Knight, coupled with the threatened pressure of the Queen moving from c1 to e1 to g3 and h4 wins White a pawn with an initiative that soon becomes decisive.

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