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Pentala Harikrishna vs Li Chao
Norway Chess (2016), Stavanger NOR, rd 5, Apr-24
Indian Game: Anti-Grünfeld. Alekhine Variation (D70)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Apr-25-16
Premium Chessgames Member
  morfishine: Harikrishna just tore him to pieces and threw him to the alligators. This game felt like a 20-move crush
Apr-30-16  ex0duz: Rather than Hari playing really well, imo it was more like Li Chao miscalculated the lines with the whole Bxe6 sac idea which i'm guessing was also just the wrong plan to begin with..

Li Chao probably missed 32.Nxf3! with the bishop skewer on the rooks when he decided to sac the bishop for 2 pawns and an advanced passed f pawn. After Hari picked that off, the game was pretty much over.

Not taking anything away from Hari, he did play well. Not just this game, but the whole tournament. But like i said, i would not go as far as to say that he played REALLY well or in some kind of 'inspired' state..

Nov-12-17  mel gibson: A very difficult closed position.
The computer - DR4 64 bit -
is saying it's close to a draw:

24. f4 (24. f4 (f3-f4 e5xf4 e4-e5
d6xe5 ♘d2-e4 ♕f6-h6 ♘d3xe5 ♖f7-e7 ♘e5-c6 ♖e7-e8 ♕g2-f3 ♗c8-f5 ♕f3-c3+ ♔g7-g8 ♘e4xc5 ♕h6-d6 ♕c3-d4 ♖a8-c8 c4xb5 a6xb5 ♗f1xb5 ♘f8-d7 ♘c5xd7 ♗f5xd7 ♖d1-d3 ♗d7-f5 ♖d3-c3 ♖e8-e4) +0.88/18 313)

score for White +0.88 depth 18

153 million board combinations.

Nov-12-17  diagonalley: 24.P-B4 seemed the only move to progress... but it's quite murky thereafter... insane(?) ... pretty damn close
Nov-12-17  newzild: I found it very, very easy to spot the first two moves today - 10 seconds max - as I play the King's Indian Defence with Black and there have been several famous games in that opening with similar sacs. The theme can also be seen in the Modern Benoni, when White plays e5.
Nov-12-17  Walter Glattke: If 27.-Bxe6 then 30.-bxc4 and try of king attack, not 30.-Qf4, otherwise 27.-Rf7
wrong concept, piece sac and no following attack.
Nov-12-17  MrCarciofo: 32 Nxf3 - why didn't Black take the Knight with his rook?
Nov-12-17
Premium Chessgames Member
  morfishine: <Mrcarciofo> On your comment: <why didn't Black take the Knight with his rook?> After <32...Rxf3> White has <33.Bg2>

*****

Nov-12-17  eblunt: <MrCarciofo:> 33. Bg2 double rook skewer
Nov-12-17
Premium Chessgames Member
  morfishine: Black should've stuck to the chao mein line

*****

Nov-12-17
Premium Chessgames Member
  malt: With a constrictive position, 24.f4 looks the only move. 24...ef4 25.e5
Nov-12-17
Premium Chessgames Member
  patzer2: For today's Sunday (24. ?) puzzle, White finds himself in a cramped position where he badly needs to activate his pieces. Passive moves like 24. b3? give Black too much of a grip on the position after 24...Ng6 ∓ (-0.95 @ 32 depth, Stockfish 8).

So with a desperate need for piece activity, like <malt> I figured the double pawn sham sacrifice 24. f4 exf4 25. e5 dxe5 26. Ne4 ± was White's only viable option.

I wasn't expecting 25...Qf5, but it wasn't too hard to figure White was OK after 26. e6 ± to +- (+2.44 @ 24 ply, Stockfish 8).

For novice players, the tactical shot 32. Nxf3! in the follow-up is instructive as 32...Rxf3? 33. Bg2 +- (+5.92 @ 28 ply, Stockfish 8) yields White a winning skewer.

P.S.: Black's game starts to go bad with 23...g5? which allows our Sunday puzzle solution 24. f4! ± (+1.06 @ 30 ply, chessgames.com Stockfish 8 engine). Instead, 23...Bd7 = (+0.07 @ 32 depth, Stockfish 8) would have been OK for Black.

Black's game goes from bad to worse with 25...Qf5? 26. e6 +- (+2.45 @ 28 depth, Stockfish 8). Instead, 25...dxe5 26. Ne4 Qh6 27. Nxe5 Re7 28. Nc6 Re8 29. d6 Bxh3 30. Qxh3 Rxe4 31. Ne7 Qf6 32. Qf3 ± (+1.16 @ 28 depth, Stockfish 8) puts up considerably more resistance.

Earlier, instead of 22...b5, Stockfish 8 indicates Black could have had a level or better game with 22...g5! = to ⩱ (-0.08 @ 30 ply). The idea is that if Black had played 22...g5! first, it would likely have been Black and not White making the first sham pawn sacrifice for piece activity and the initiative to improve his position.

Stocfish 8 indicates play after 22...g5! might go 23.f4 exf4 24.Nf3 Ng6 25.O-O-O g4! 26.hxg4 Ng5 27.e5 Nxe5 28.Ndxe5 dxe5 29.Nxh4 f3 30.Qd2 Qf4 31.Nf5+ Bxf5 32.Qxf4 exf4 33.gxf5 Kf6 34.Rg4 Rh7 35.Bd3 Rah8 36.Rxf4 Rh4 37.Rxh4 Rxh4 38.Kd2 Ke5 39.Ke3 Rh2 40.Rf1 Rxb2 = (0.00 @ 30 ply).

Nov-12-17  Marmot PFL: Being a puzzle I figure it has to be 24 f4 exf4 25 e5 dxe5 26 Ne4, a typical breakthrough sacrifice for piece activity. This targets c5, e5 and g5 as well as threatening d6 (with tempo if Qe7). The white knights dominate the center and black's major pieces are all vulnerable, but I don't see a clear winning line.
Nov-12-17  Marmot PFL: Black picked a defense I didn't consider but it ends up much worse.
Nov-12-17
Premium Chessgames Member
  dorsnikov: It's impossible for a human mind to conceive every move that was made from 24. p- f4 to Black's resignation. Harikrishna probably saw the possibilities of 24. p-f4. But, to see all the way to the culmination is impossible.
Nov-12-17
Premium Chessgames Member
  FSR: 24.f4 exf4 25.e5 is obvious enough, but accurately calculating the consequences is another story.
Nov-12-17  cormier: 1) +0.07 (33 ply) 2...e6 3.a3 d5 4.Nf3 b6 5.cxd5 exd5 6.Bf4 Bb7 7.e3 Bd6 8.Ne5 O-O 9.Nc3 c5 10.Bb5 a6 11.Ba4 b5 12.Bc2 cxd4 13.exd4 Re8 14.O-O Nc6 15.Re1 b4 16.Ne2 bxa3 17.Nxc6 Bxc6 18.bxa3 Qc7

2) +0.21 (33 ply) 2...c6 3.e3 e6 4.Nf3 d5 5.Bd3 Be7 6.O-O b6 7.Qe2 Bb7 8.Rd1 O-O 9.b3 Nbd7 10.Bb2 dxc4 11.Bxc4 Qb8 12.Ne5 a5 13.Nxd7 Nxd7 14.Nd2 Rd8 15.e4 c5 16.d5 exd5 17.Bxd5 Bxd5 18.exd5 Bd6

3) +0.39 (33 ply) 2...d6 3.Nf3

4) +0.35 (32 ply) 2...b6 3.f3 Bb7 4.e4 e6 5.Nc3 Bb4 6.Ne2 O-O 7.Ng3 Nc6 8.Be3 e5 9.d5 Bxc3+ 10.bxc3 Na5 11.Bd3 d6 12.O-O Ba6 13.Qe2 c6 14.Rae1 h6 15.h3 cxd5 16.cxd5 Bxd3 17.Qxd3 Rc8 18.Nf5 Nc4 19.Bf2 Rc7 20.Bh4

5) +0.36 (32 ply) 2...g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 8.Be3 O-O 9.Rc1 Qa5 10.Qd2 Nd7 11.Bd3 b5 12.h4 c4 13.Bc2 Nf6 14.e5 Nh5 15.O-O Rb8 16.d5 Bg4 17.Nh2 Bc8 18.Qd4 Qxa2 19.Qxa7 Qxa7 20.Bxa7

6) +0.39 (32 ply) 2...d5 3.cxd5 c6 4.dxc6 Nxc6 5.e3 e5 6.Nf3 exd4 7.Nxd4 Bc5 8.Nc3 Bxd4 9.exd4 Qxd4 10.Qxd4 Nxd4 11.Bd3 O-O 12.O-O Rd8 13.Rd1 Bf5 14.Bxf5 Nxf5 15.Bg5 Rac8 16.Rac1 Nd4 17.Be3 Nc6 18.Re1 Kh8 19.Red1 Rxd1+ 20.Rxd1

1.5 hour analysis by Stockfish 8

Nov-12-17  cormier: 1) +0.32 (35 ply) 3.g3

2) +0.22 (34 ply) 3.Nc3 d5 4.Bg5 Bg7 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 O-O 8.Nf3 c5 9.Rc1 Bg4 10.d5 Qd6 11.Be2 f5 12.Nd2 h6 13.Nc4 Bxe2 14.Qxe2 Qd7 15.Bd2 Na6 16.O-O e6 17.dxe6 Qxe6 18.Rb1 b6 19.Rfe1 f4 20.a3 g5

3) +0.16 (34 ply) 3.Bf4 Bg7 4.Nc3 O-O 5.e4 d6 6.Nf3 Bg4 7.Be2 Nc6 8.d5 e5 9.Be3 Bxf3 10.Bxf3 Nd4 11.O-O Nd7 12.Bg4 f5 13.exf5 gxf5 14.Bh3 Qf6 15.Qd2 Rae8 16.f4 c5 17.dxc6 bxc6 18.Rad1 Qe6 19.fxe5 dxe5

4) +0.14 (34 ply) 3.Nf3 Bg7 4.Nc3 d5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 c5 8.Be3 O-O 9.Qd2 b6 10.Rc1 e6 11.Bd3 cxd4 12.cxd4 Bb7 13.Bh6 Nc6 14.Bxg7 Kxg7 15.Bb5 Na5 16.Qe3 Rc8 17.O-O Qe7 18.Rfd1 f6 19.a3 Rxc1 20.Rxc1 Rc8 21.Rxc8 Bxc8 22.Be2 Bb7 23.h3

1.5 hour analysis by Stockfish 8

Nov-12-17  cormier: 1) +0.31 (29 ply) 3...d5 4.cxd5 Nxd5 5.e4 Nb6 6.Nc3 Bg7 7.Be3 O-O 8.Qd2 e5 9.d5 c6 10.d6 Be6 11.h4 h5 12.Nh3 Nc4 13.Bxc4 Bxc4 14.b3 Ba6 15.Nf2 Nd7 16.O-O-O f5 17.exf5 gxf5 18.Bh6 Qf6 19.Bxg7 Kxg7 20.Qg5+ Qxg5+ 21.hxg5 Kg6 22.Kc2 Kxg5 23.Kb2

2) +0.44 (29 ply) 3...c5 4.d5

3) +0.29 (28 ply) 3...Bg7 4.e4 c5 5.d5 d6 6.Ne2 e6 7.Nbc3 O-O 8.Ng3 a6 9.Bf4 exd5 10.cxd5 b5 11.Qd2 h5 12.h4 Ne8 13.Bg5 Bf6 14.a3 Nd7 15.Be2 c4 16.Bxf6 Qxf6 17.Qg5 Nc7 18.Qxf6

4) +0.43 (28 ply) 3...d6 4.e4 Bg7 5.Nc3 O-O 6.Bg5 a6 7.Qd2 Nbd7 8.Nge2 b5 9.cxb5 axb5 10.Nxb5 Ba6 11.Nec3 c6 12.Na3 Bxf1 13.Rxf1 c5 14.d5 Nb6 15.O-O-O h5 16.Kb1 Nfd7 17.f4 f6

12.0 minute analysis by Stockfish 8

Nov-12-17  cormier: 1) +0.29 (23 ply) 5...e6 6.Ne2

2) +0.33 (23 ply) 5...Bg7 6.Ne2 e6 7.Bg5 a6 8.Qd2 exd5 9.cxd5 h6 10.Be3 b5 11.h4 Nbd7 12.Ng3 Bb7 13.Be2 Ne5 14.Nc3 b4 15.Nd1 h5 16.Bg5 O-O 17.O-O Qe8

1.0 minute analysis by Stockfish 8

Nov-12-17  cormier: 1) +0.24 (28 ply) 6.Nc3 a6

3.0 minute analysis by Stockfish 8

Nov-12-17  cormier: 1) +0.29 (24 ply) 6...e6 7.Bg5 exd5 8.cxd5 Nbd7 9.Nec3 O-O 10.Nd2 a6 11.a4 h6 12.Bh4 Qc7 13.Nc4 Nb6 14.Qd2 Bd7 15.Bf2 Nxc4 16.Bxc4 b5 17.axb5 Bxb5 18.Nxb5

1.0 minute analysis by Stockfish 8

Nov-12-17  cormier: 1) +0.23 (35 ply) 7.Ng3 e6 8.Nc3 a6 9.a4 Ne8 10.Be3 exd5 11.cxd5 f5 12.Qd2 fxe4 13.Ngxe4 Nd7 14.Be2 Ne5 15.O-O Nf6 16.Nxf6+ Qxf6 17.Ne4 Qd8 18.Ra3 Bf5 19.Ng3 Qh4 20.Qe1 Rae8 21.Nxf5 Qxe1 22.Rxe1 Rxf5 23.Bf2 Nf7 24.Rb3 Rxd5

2) +0.22 (35 ply) 7.Nbc3 e6 8.Ng3 a6 9.a4 exd5 10.cxd5 Nbd7 11.Be2 Ne8 12.Be3 f5 13.exf5 gxf5 14.Qd2 Qe7 15.O-O Qxe3+ 16.Qxe3 Bd4 17.Qf2 Bxf2+ 18.Kxf2 Ne5 19.Nh5 Bd7 20.Nf4 Nc7 21.Rfd1 Rfe8 22.g3 Kg7 23.h4 b5 24.axb5 axb5 25.Rxa8 Rxa8

3) +0.10 (34 ply) 7.Nec3 e6 8.Bg5 h6 9.Be3 exd5 10.cxd5 Nfd7 11.Qd2 Ne5 12.Be2 f5 13.O-O Nf7 14.h3 Na6 15.Bxa6 bxa6 16.Na3 fxe4 17.Nxe4 Bf5 18.Nc4 Bxe4 19.fxe4 Rb8 20.Rac1 Qe7 21.b3 Rbe8 22.Rce1 Ng5 23.e5 Ne4 24.exd6

60.0 minute analysis by Stockfish 8

Nov-12-17  devere: Very similar to (and slightly easier than) Saturday's problem, in that the first two moves to gain advantage are clear cut; and after that it becomes more difficult to determine how best to proceed.
Nov-12-17  drollere: as others have said, f4 was easy to spot (even for me), but the rest is hard to foresee because so much of it depends on black's answers.

why not 28. ... Nxe6 instead of 28. ... Qxe6, for example? or even 27. .. Nxe6? recapturing with the QB attacks both c4 and h3 while defending the f pawn.

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