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Paul van der Sterren vs Ljubomir Ljubojevic
Hoogovens (1987), Wijk aan Zee NED, rd 1, Jan-16
Queen's Indian Defense: Fianchetto. Nimzowitsch Variation Quiet Line (E15)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Nov-17-17  Walter Glattke: 33.-Nxf6 34.exf6+ Kxf6 35.Qh5 or
33.Rxd5 ed5 34.Qxd5 also winning, I think.
Nov-17-17
Premium Chessgames Member
  drollere: 33...Nxf6, 34. exf6+ Kxf6, 35. Qxd8+ Kg7,
36. Kxg2
Nov-17-17  WorstPlayerEver: I didn't get it, but it seems after 32. Nf6 Nxf6 33. exf6 Kxf6 34. Bxd5 Black can't play exd5, because of 35. Rxd5

After 35... Rxd5 36. Qxd5 White threatens mate by 37. Qe5x and Black will lose Rb3, so Black has to play 34... Kg7 in this line, then 35. Bxb3 follows next and White is a piece up.

Nov-17-17
Premium Chessgames Member
  Willber G: I went for the exchange sac 32.Rxd5 but I couldn't make it work.
Nov-17-17  malt: I went for 32.Nf6 N:f6 33.ef6+ K:f6 34.Qh5
then went for
32.Nd6 clearing the way for the rook, for h4 32..B:g2 33.Rh4 h5 35.Qg5 (35.Qf4 Rf3)
Nov-17-17  Pasker: That's what you call a difficult puzzle not some positional 'guess the move' as usual. That one move starting with Nf6 completely demolishes black no matter how he responds. Capturing the knight will lead to the win of a rook after a combination of forced moves. Capturing the bishop leads to what we just saw. Black has no counter play either. Its deep and forces win.
Nov-17-17  mel gibson: The computer agrees with the first move:

32.
Nf6 (32. Nf6 (♘e4-f6 ♘d7xf6 e5xf6+ ♔g7xf6 ♗g2xd5 ♔f6-g7 ♗d5xb3 ♕a7xd4 ♕d2xa5 ♖d8-b8 ♖e1-d1 ♕d4-b2 ♗b3-c4 ♖b8-c8 ♗c4-d3 ♕b2-b3 ♖d1-d2 ♖c8-c1+ ♔g1-g2 ♕b3-b7+ f2-f3 ♕b7-b8 ♕a5-b4 ♕b8-c7 a3-a4 ♖c1-c5 ♗d3-e4 f7-f5 ♕b4-b7 ♕c7xb7 ♗e4xb7) +3.34/18 156)

score for White +3.34 depth 18

Nov-17-17  mel gibson: Following the text - Black is gone after move 34

34. Nxh5+ (34. Nxh5+ (♘f6xh5+ g6xh5 ♕d2-g5+ ♔g7-f8 ♕g5xd8+ ♔f8-g7 ♖h4xh5 ♕a7xf2+ ♔g1xf2 ♖b3-f3+ ♔f2xg2 ♘d7-f8 ♔g2xf3 ♘f8-g6 ♕d8-f6+ ♔g7-g8 ♖e1-b1 ♘g6xe5+ ♔f3-e2 a5-a4 ♖b1-b8+) +M11/15 111)

White wins mate in 11.

Nov-17-17
Premium Chessgames Member
  patzer2: A couple of last week's more difficult solutions involved Rook exchange sacrifices. So I figured 32. Rxd5 had to be today's Friday puzzle (32. ?) solution. I figured wrong.

After 32.Rxd5 exd5 33.Qxd5 Qb7 34.Qxf7+ Kxf7 35.Nd6+ Ke7 36.Nxb7 Rb8 37.Nxa5 Rb1 38.Nc6+ Kf8 39.Kf1 Rxe1+ 40.Kxe1 Rb1+ 41.Kd2 = (0.00 @ 42 ply, Stockfish 8), Black has a fully level game.

The correct solution is the deeply calculated game continuation 32. Nf6! +- (+3.83 @ 24 ply, Stockfish 8).

If 32...Nxf6, White gets a decisive King hunt after 32...Nxf6 33.exf6+ Kxf6 34.Bxd5 exd5 35.Rxd5 Rxd5 36.Qxd5 +- (+10.08 @ 26 ply, Stockfish 8) when play might continue Qb8 37.Qd4+ Kf5 38.Re7 Rb1+ 39.Kg2 Rb5 40.f4 Rb2+ 41.Kh3 g5 42.Rxf7+ Kg6 43.Qf6+ Kh5 44.Qxg5#.

If 34...gxh5, White forces mate after 34...gxh5 35.Qg5+ Kf8 36.Qxd8+ Kg7 37.Rxh5 f6 38.Qh8+ Kf7 39.Rh7+ Kg6 40.Qg7+ Kf5 41.Rh5#.

Nov-17-17  saturn2: I took 32 Nd6 with the idea to create further pressure on f7.
Nov-17-17  wtpy: I saw the game continuation quickly but for some reason couldn't see the response to 32., Nf6 33 ef6 Kf6 last night when I initially looked at it, but the response seems simpler this morning.Still perfect for this week.
Nov-17-17
Premium Chessgames Member
  kevin86: The attack begins slowly and ends fast.
Nov-17-17  maxi: Far nicer than usual.
Nov-17-17
Premium Chessgames Member
  Administrator: analysis of move 32.?

After an hour ponder Stockfish agrees that 32. Nf6 is a bone crusher.

Nov-17-17
Premium Chessgames Member
  patzer2: Black's game takes a turn for the worse with 23...Rab8 allowing 24. Nd6 ± (+0.84 @ 29 ply, Stockfish 8).

Instead, 23...Bxe4 24. Bxe4 Nd5 = (+0.13 @ 31 ply, Stockfish 8) holds it about level as the "advantage of the two Bishops" is minimal for White.

Nov-17-17
Premium Chessgames Member
  Jimfromprovidence: <WorstPlayerEver> <I didn't get it, but it seems after 32. Nf6 Nxf6 33. exf6 Kxf6 34. Bxd5 Black can't play exd5, because of 35. Rxd5

After 35... Rxd5 36. Qxd5 White threatens mate by 37. Qe5x and Black will lose Rb3>

here's the position after 36 Qxd5 in your line.


click for larger view

Black can try to both protect the rook and the mate in one with 36...Qb8.


click for larger view

White hopefully forces things with 37 Qd4+ Kf5 38 h4!? (with the threat of 39 g4# therefore making black give up the rook)


click for larger view

Nov-17-17  Walter Glattke: I now have proofed several continuations after 32.Rxd5 exd5 33.Qxd5 but of course all of them bring no win for white, Stockfish said it.
Nov-17-17  cormier: 1) +0.14 (33 ply) 3.g3

2) +0.12 (33 ply) 3.Nc3 Bb4 4.Qc2 d5 5.cxd5 exd5 6.Bg5 O-O 7.e3 h6 8.Bh4 Be6 9.a3 Bxc3+ 10.Qxc3 Bf5 11.Bd3 Bxd3 12.Qxd3 c6 13.Ne2 Nbd7 14.O-O Re8 15.Rac1 Rc8 16.Rfd1 Qb6 17.b3 Qb5 18.Qxb5 cxb5 19.Bxf6 Nxf6 20.h3

3) +0.09 (33 ply) 3.Nf3 b6 4.a3 Be7 5.d5 Ba6 6.e3 O-O 7.Nc3 Re8 8.Be2 exd5 9.cxd5 c6 10.b4 Bxe2 11.Qxe2 b5 12.O-O a5 13.bxa5 Rxa5 14.Bb2 Na6 15.Rfd1 Qc7 16.e4 Bd6 17.Re1 Qb8 18.dxc6 dxc6 19.Kh1 Nd7 20.Rad1

4) +0.07 (32 ply) 3.Qc2 c5

5) +0.06 (32 ply) 3.Bf4 Bb4+ 4.Nd2 c5 5.dxc5 Bxc5 6.e3 Nc6 7.Bg3 Be7 8.Be2 O-O 9.Bf3 Qb6 10.Qc2 d6 11.Ne2 Bd7 12.Nc3 Rac8 13.O-O Na5 14.b3 d5 15.Be2 Bd6 16.Bxd6 Qxd6 17.Rad1 Qc5 18.Kh1 dxc4 19.Nxc4 Nxc4 20.bxc4

6) +0.05 (32 ply) 3.a3 d5 4.Nf3 b6 5.Bf4 Bd6 6.Bxd6 Qxd6 7.cxd5 exd5 8.e3 O-O 9.Nc3 c5 10.Be2 Ba6 11.Bxa6 Nxa6 12.Rc1 Nc7 13.O-O Rfe8 14.h3 Rad8 15.Qa4 a6 16.Qc2 c4 17.Ne5 b5 18.Qf5 Ne6 19.Rfd1

1.5 hour analysis by Stockfish 8

Nov-17-17  cormier: 1) +0.23 (30 ply) 5.Qc2 c5 6.d5 g6 7.e4 Bg7 8.Nc3 O-O 9.Be2 exd5 10.exd5 d6 11.O-O Bc8 12.Bf4 Na6 13.Rfe1 Bg4 14.Nh4 Bxe2 15.Rxe2 Nh5 16.Bd2 Qd7 17.Rae1 Rae8 18.Ne4 Nf6 19.Nf3 Nxe4 20.Rxe4 Rxe4 21.Rxe4 Nc7 22.Bc3

2) +0.22 (30 ply) 5.Qa4 c5 6.Bg2 Bb7 7.dxc5 bxc5 8.Nc3 Be7 9.Qb3 Bc6 10.Qc2 O-O 11.Bf4 d6 12.Rd1 Qc7 13.O-O Nbd7 14.b3 h6 15.e4 a6 16.Bc1 Rfd8 17.Rfe1 a5 18.Bb2 Ne5 19.Nxe5 dxe5

3) +0.20 (30 ply) 5.Nbd2 Bb4 6.a3 Bxd2+ 7.Nxd2 Bb7 8.Nf3 O-O 9.Bg2 d6 10.O-O a5 11.b3 Nbd7 12.Bb2 Re8 13.Bh3 Qb8 14.Nd2 c5 15.dxc5 bxc5 16.Qc2 Rf8 17.e4 Bc6 18.a4 Qb7 19.Rae1 h6 20.Bg2

4) +0.16 (30 ply) 5.b3 Bb4+ 6.Bd2 Be7 7.Bg2 d5 8.O-O O-O 9.Ne5 Bb7 10.Nc3 Nbd7 11.e3 c5 12.a4 Qc7 13.Nb5 Qb8 14.Nxd7 Nxd7 15.dxc5 bxc5 16.Ba5 Nf6 17.Bc7 Qc8 18.Be5 dxc4 19.Bxb7 Qxb7 20.bxc4 Rac8

5) -0.07 (30 ply) 5.e3 d5

20.0 minute analysis by Stockfish 8

Nov-17-17  cormier: 1) +0.10 (29 ply) 5...Bb4+ 6.Bd2 Be7 7.Nc3 Bb7 8.Bg2 O-O 9.O-O d5 10.Ne5 Nbd7 11.e3 c5 12.a4 cxd4 13.exd4 Ne4 14.Nxe4 dxe4 15.Bc3 a5 16.Ng4 f5 17.Ne3 Qb8 18.f4 Nf6 19.Qe2 Nd7 20.Rad1 Nf6 21.h3

2) +0.17 (29 ply) 5...Bb7 6.Bg2 Bb4+ 7.Bd2 Be7 8.Nc3 O-O 9.O-O d5 10.Ne5 Nbd7 11.cxd5 exd5 12.Rc1 h6 13.Bf4 c5 14.h4 Re8 15.e3 Nf8 16.dxc5 Bxc5 17.Ne2 Ne6 18.Nd3 Ba3 19.Rc2 Nxf4 20.Nexf4

3) +0.20 (29 ply) 5...d5 6.Bg2 Bb4+ 7.Bd2 Bxd2+ 8.Qxd2 O-O 9.Nc3 Qd6 10.O-O Nc6 11.Rfd1 Rad8 12.Nb5 Qe7 13.Qb2 dxc4 14.bxc4 Na5 15.Ne5 c5 16.e3 cxd4 17.Rxd4 Rxd4 18.exd4 Bb7 19.Re1 Bxg2 20.Kxg2 Qb7+ 21.f3 a6

4) +0.28 (29 ply) 5...Be7 6.Bg2 d5 7.Ne5 Bb7 8.O-O O-O 9.e3 Nbd7 10.Bb2 c6 11.Nxd7 Qxd7 12.Nd2 Rfd8 13.Qe2 a5 14.e4 dxe4 15.Nxe4 Nxe4 16.Bxe4 h6 17.Rfd1 a4 18.Bc3 axb3 19.axb3 Rxa1 20.Rxa1

5) +0.41 (29 ply) 5...c6 6.Bg2

15.0 minute analysis by Stockfish 8

Nov-17-17  cormier: 1) +0.29 (32 ply) 7.O-O Be7 8.Ne5 Bb7 9.Nc3 O-O 10.e3 Nbd7 11.f4 c5 12.Qe2 Qc7 13.Ba3 Rad8 14.Rad1 h6 15.Bb2 cxd4 16.exd4 dxc4 17.Nb5 Qb8 18.bxc4 Qa8 19.Bxb7 Qxb7 20.Qf3 Ne4 21.Nxa7 Nxe5 22.fxe5 Qxa7 23.Qxe4 Qxa2

15.0 minute analysis by Stockfish 8

Nov-17-17  cormier: 1) +0.20 (33 ply) 8.Nbd2 Be7 9.Qc2 Bb7 10.e4 dxe4 11.Nxe4 c5 12.Nxf6+ Bxf6 13.Be3 O-O 14.Rad1 cxd4 15.Nxd4 Bxg2 16.Kxg2 Qc7 17.Nb5 Qc6+ 18.f3 Rfd8 19.Qe4 Ne5 20.Rxd8+ Rxd8 21.Nxa7 Qxe4 22.fxe4 Ng4 23.Bxb6 Rd2+ 24.Kg1 Rxa2 25.b4 Rc2 26.c5 Ne3 27.Rxf6 gxf6 28.c6 Nd1 29.c7

15.0 minute analysis by Stockfish 8

Nov-17-17
Premium Chessgames Member
  ChessCoachClark: The ending of this game was very interesting to me. The Hook Mate pattern is neither at the edge nor at the corner. Quite a nice addition to my collection of Hook Mate games.

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