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Joris Brenninkmeijer vs Artur Pieniazek
European Junior Championship (1987/88), Arnhem NED, rd 11, Dec-30
Benko Gambit: Declined. Sosonko Variation (A57)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Nov-15-17  DarthStapler: I picked Qh6+ instead of f7
Nov-15-17  Walter Glattke: 33.-Qg6!? 34.f7+ better than 34.Rg7+
Nov-15-17  AlicesKnight: 33.Rxa7 looks interesting; if the Q captures then Qg6+ is followed by f7 and Black is in trouble. Let's see - yes.
Nov-15-17  Lambda: 33.Rxa7 (clearly a good move if black can't recapture) Qxa7 34.Qg6+ Kf8 (after 34...Kh8 35.f7 black has no good defence to the threat of 36.Qh6 mate) 35.f7 and black has no good defence against the twin threats of 36.fxe8=Q mate and 36.Qg8+ followed by f8=Q. For instance, 35...Ra8 36.Qg8+ Ke7 37.f8=Q+ Rxf8 38.Qxf8+ Kd7 39.Rf7+ wins.
Nov-15-17  morfishine: <33.Rxa7> 33...Qxa7 <34.f7+> was my choice

*****

Nov-15-17  malt: <33.R:a7> Q:a7 34.Qg6+ Kf8 (34...Kh8) 35.f7 Rd8 36.Qg8+ Ke7 37.f8Q+ R:f8
38.Q:f8+ Kd7 39.Rf7+ Re7 40.R:e7#

<33.R:a7> R5e7 34.fe7 Qg7 35.Rf8+ R:f8 36.ef8Q+ K:f8 (36...Q:f8 37.Qg6+ and #) 37.Qf5+ Kg8 38.R:g7+ K:g7 39.Be4

Nov-15-17  morfishine: Follow up: 33.Rxa7 Qxa7 <34.f7+> 34...Kf8 35.fxe8=Q+ Kxe8 36.Qg6+ Kd7 37.Rf7+ Re7 <38.Qe6+>


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White wins

*****

Nov-15-17  mel gibson: Nice play.
The computer - DR4 64 bit - says mate in 20:

33. Rxa7 (33. Rxa7 (♖a6xa7 ♖e8-f8 ♖a7xf7 ♔g8xf7 ♕d3-h7+ ♔f7-e8 ♖f1-f5 ♖e5-e1+ ♔g1-f2 ♘b6-d7 ♕h7xh5+ ♔e8-d8 ♔f2xe1 ♘d7-b6 f6-f7 ♘b6-c8 ♕h5-h6 ♔d8-e7 ♕h6-e6+ ♔e7-d8 ♔e1-d2 ♔d8-c7 ♕e6-h6 ♘c8-e7 ♖f5-f6 ♖f8-a8 f7-f8♕ ♖a8-a2+ ♔d2-d3 ♖a2-d2+ ♔d3xd2) +M20/17 156)

Nov-15-17  moodini: <morfishine> I also was tempted by that but got put off by 34..Qxf7 when black has swapped a Q for 2Rs. I could not tell what the outcome would be, but it did not look clear to me whereas the line played is a clear win.

In fact I missed that the line played is mate, I thought I was just going to win the black Q with a skewer.

Nov-15-17  patzer2: Missed the strong mating attack with 33. Rxa7! in today's Wednesday puzzle (33. ?) because after 33. Rxa7! Qxa7 34. Qg6+ Kf8 I failed to see that 35. f7! +- (mate-in-five, Stockfish 8 @ 16 ply) forces a quick mate.

Instead I went for the second best move 33. Qg3+, which according to Stockfish 8 is still winning after 33...Kh7 34. Qf4 Rg8 35. Kh1 Qg6 36. Rxa7+ +- (+4.93 @ 31 ply).

For a Black improvement, instead of 21...Nb6 =, simply 21...Nc6 ∓ (-0.86 @ 31 ply, Stockfish 8) gives the second player a clear and strong advantage.

A move earlier, Stockfish 8 indicates 20...Nxb2! ∓ to -+ (-2.04 @ 31 ply) would have given Black a complex position with excellent winning chances.

P.S.: Without a little help from Black, the Benko Gambit can be a tough nut for White to crack. Perhaps with Black's recent win in D Harika vs Kramnik, 2017 the Benko Gambit may be making a comeback at top levels.

Nov-15-17  gofer: I saw this one quite quickly, probably because I had this position a couple of weeks ago...


click for larger view

<28 ?>

Nov-15-17
Premium Chessgames Member
  OhioChessFan: Another overworked defender, this time the Queen. In this example, she must defend a Pawn being captured on a7, and defend the f7 square from being occupied. She wasn't up to the multitask and a pretty easy win from there. I can't decide if Black played on a bit too long, or it was a time scramble.
Nov-15-17  Gilmoy: <gofer: 28.>Qc2 Qe8 29.f7+ Nxf7 30.Qxg6+:


click for larger view

and oh-snap mate next. The Ba3 takes a bow: it denies Kf8 escaping through e7.

Nov-15-17
Premium Chessgames Member
  Jimfromprovidence: I got 33 Rxa7 Re3.


click for larger view

White can beat the counterattack. Best is any safe move for the queen along the b1-h7 diagonal,to ensure access to g6, particularly 34 Qf5.

If black tries 34...R8e5, white wins nicely after 35 Rxf7 Rxf5 36 Rg7+ Kf8 37 Rxf5.


click for larger view

Nov-15-17  mriddle: <Skewbrow> interesting analysis of 33...Nd7. After 33...Nd7 34. Rxd7 Qxd7 35. Qg6+ Kf8 36. f7 Ke7, I think 37. Qf6+ Kf8 38. fxe8=Q++ Kxe8 Qf8# finishes it off
Nov-15-17  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

1.5 hour analysis by Stockfish 8

Nov-15-17  cormier: 1) +0.34 (36 ply) 4.cxb5 a6 5.e3 e6 6.dxe6 fxe6 7.Nf3 d5 8.Nc3 c4 9.Be2 axb5 10.Nxb5 Bd7 11.Nc3 Bb4 12.Bd2 Nc6 13.O-O O-O 14.b3 cxb3 15.Qxb3 Bd6 16.a4 Rb8 17.Nb5 Ne4 18.Qc2 Nxd2 19.Qxd2 Bb4 20.Qc2 Ba5 21.Qb2 Nb4 22.Rfd1 Qf6 23.Qxf6 Rxf6 24.h3

2) +0.28 (36 ply) 4.Nf3 Bb7 5.e3 b4 6.Bd3 d6 7.a3 a5 8.e4 g6 9.h3 Nbd7 10.O-O Bg7 11.Be3 O-O 12.Nbd2 h6 13.Bc2 Nh5 14.Ra2 e5 15.Ra1 Nf4 16.Re1 Qc7 17.Qc1 Nb6 18.b3 Qe7 19.Qb1 Nd7 20.Nf1 Nb6 21.axb4 axb4

3) +0.15 (36 ply) 4.e3 b4 5.Bd3 g6 6.Nd2 Bg7 7.Ne2 O-O 8.Nf3 d6 9.h3 a5 10.e4 Nh5 11.O-O Nd7 12.Qc2 a4 13.Rb1 e6 14.Bg5 f6 15.Bd2 Ne5 16.Nxe5 fxe5 17.a3 b3 18.Qc1 Bb7 19.Bh6 Nf4 20.Bxf4 exf4 21.Nxf4 exd5 22.cxd5

2.5 hour analysis by Stockfish 8

Nov-15-17  cormier: 1) +0.05 (30 ply) 4...bxc4 5.Nc3 Ba6 6.e4 d6 7.Nf3 Nbd7 8.Qc2 g6 9.Nb5 Nb6 10.Na3 Bg7 11.a5 Nbd7 12.Bxc4 Qxa5+ 13.Bd2 Qb6 14.Qd3 Bc8 15.O-O O-O 16.h3 Qb8 17.Bb5 Nb6 18.Bc6 Bb7 19.Nc4 Nxc4 20.Qxc4 Bxc6 21.dxc6 Qxb2

2) +0.22 (30 ply) 4...Qa5+ 5.Bd2

3) +0.36 (29 ply) 4...b4 5.Nd2 d6 6.e4 g6 7.Bd3 Nbd7 8.Ndf3 Bb7 9.h3 Bg7 10.Ne2 a5 11.Be3 O-O 12.O-O h6 13.Qd2 g5 14.Ng3 e6 15.Rfe1 Ba6 16.Rad1 g4 17.hxg4 Nxg4 18.Nh5 Nxe3

5.0 minute analysis by Stockfish 8

Nov-15-17  cormier: 1) +0.17 (31 ply) 5.Nd2 d6

2.0 minute analysis by Stockfish 8

Nov-15-17  cormier: 1) +0.28 (35 ply) 5...g6 6.Bg2 d6 7.b3 Bg7 8.Ra2 O-O 9.e4 Bb7 10.Re2 Re8 11.Bb2 e6 12.Nf3 exd5 13.exd5 Rxe2+ 14.Qxe2 Nbd7 15.O-O Qf8 16.Nbd2 Re8 17.Qd1 Nh5 18.Bxg7 Nxg7 19.Re1 f5 20.h4 h6 21.Qa1 a5 22.Qd1 Nh5 23.Re2 Rxe2 24.Qxe2

25.0 minute analysis by Stockfish 8

Nov-15-17  cormier: 1) +0.28 (33 ply) 7.b3 Bg7 8.Bb2 Bb7 9.Nh3 e6 10.Nf4 Qe7 11.O-O e5 12.Nh3 O-O 13.e4 Nbd7 14.Nd2 h6 15.Qe2 Rae8 16.Rae1 a5 17.Qd1 Qd8 18.Qc2 Qe7 19.f4 exf4 20.gxf4 Nh5 21.Nf3 Bxb2 22.Qxb2 Ndf6 23.e5 Ng4 24.Qd2 f6 25.Nf2 Nxf2 26.Rxf2

5.0 minute analysis by Stockfish 8

Nov-15-17  cormier: 1) +0.26 (30 ply) 8.Nd2 Bg7 9.f4 O-O 10.Ngf3 Re8 11.O-O Ba6 12.Bh3 Qc7 13.Ra2 e6 14.dxe6 fxe6 15.b3 Bb7 16.Bb2 e5 17.f5 gxf5 18.Bxf5 Nf8 19.Ng5 h6 20.Ngf3 Ne6 21.Nh4 Rad8 22.Qe1 Nd4 23.Bg6 Rf8 24.Qe3 Nc2

5.0 minute analysis by Stockfish 8

Nov-15-17
Premium Chessgames Member
  Bubo bubo: On 33.Rxa7! Black cannot afford to recapture: 33...Qxa7 34.Qg6+ Kf8/h8 35.f7 with the decisive threat of Qg8+ resp. Qh6#.

Interposing is also hopeless, therefore Black can only try the <zwischenzug> 33...Re3, but White renews his threat with 34.Qf5. The black queen has no retreat (as she still has to guard g6), and attacking the white queen again with 34...Re5 fails to 35.Rxf7 Rxf5 36.Rg7+ and 37.Rxf5, losing a whole rook.

Nov-16-17  kevin86: White eventually wins BLACK'S queen.
Nov-22-17  morfishine: <moodini> You are correct sir, thank you for your post

*****

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