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David Bronstein vs Paul Keres
Zurich Candidates (1953), Zurich SUI, rd 12, Sep-19
Sicilian Defense: Closed Variation (B23)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Given 13 times; par: 106 [what's this?]

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Kibitzer's Corner
Nov-18-06
Premium Chessgames Member
  Honza Cervenka: Keres moved twice with his Queenside Rook on b8 in this game and in both cases to his harm. The fact is that he had already significant troubles with development of Queenside when he played 16...Rb8 but it was not lucky decision here in combination with weak dark squares on Kingside. Instead of 18...Bd7 black should have played 18...Nc6 with worse but still defendable position after 19.c3 Qxd3. That is why 18.c3 with idea 18...Qb6 19.Qf4 seems to be more precise order of moves. 19...Qb6 was a blunder but the position was already bad for black. The only move covering white's threats is 19...Qg7, but after 20.Nc5 Nc6 21.d4 white has clear edge. 20.Nf6+ would be fine puzzle on Monday.
Apr-07-07  Eatman: Interestingly enough, Bronstein notes that 18. ... Ra8 (moving rook back again!) would have saved black from immediate harm, although their position would remain questionable.
Jul-22-08  Ulhumbrus: <Eatman: Interestingly enough, Bronstein notes that 18. ... Ra8 (moving rook back again!) would have saved black from immediate harm, although their position would remain questionable. > On 18...Ra8 White's N on e4 is pinned to his Queen and attacked by the f5 pawn. However 19 Qc7 makes a counter-attack on the Black N and unpins White's N at the same time, after which Black may remain in trouble.
Jan-06-12  DrGridlock: <Ulhumbrus>
"However 19 Qc7 makes a counter-attack on the Black N and unpins White's N at the same time, after which Black may remain in trouble."

Or Black may play 19 ... Nd5, after which it is White who is in trouble.

White's knight is not really "pinned" to the Queen, and it is White's Queen which pins Black's f-pawn, and prevents it from capturing White's knight (... fxe4? Qxf8!). In your line, by moving his queen White now activates the capture ... fxe4. White also allows an attack on his queen, with tempo, to black's ... Nd5.

Jan-06-12  DrGridlock: <Eatman>
"Interestingly enough, Bronstein notes that 18. ... Ra8 (moving rook back again!) would have saved black from immediate harm, although their position would remain questionable."


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Analysis by Komodo32 3 32bit:

1. (0.30): 18...Nc6 19.c3 Qe5 20.Qf2 Qg7 21.Ng5 h6 22.Nf3 e5 23.Rae1 Bd7 24.Qc5 Rfe8 25.Nd2 Be6 26.Nc4 Bxc4 27.Qxc4+ Kh8 28.b4 Rbc8 29.Qb3 Rcd8 30.b5 Ne7 31.Qc4 Rd7

2. (0.62): 18...e5 19.Qh6 Nc6 20.Ng5 Qd7 21.Nxh7 Qxh7 22.Bd5+ Be6 23.Bxe6+ Kh8 24.Qg5 Nd4 25.Bb3 Rbe8 26.c3 Nxb3 27.axb3 b6 28.g4 a5 29.gxf5 gxf5 30.Rf3 Re6 31.Rg1 Rh6 32.Rg2 Re6 33.c4 f4 34.Rg1

3. (0.64): 18...Ra8 19.c3 Qb6 20.Ng5 h6 21.Nf3 g5 22.Qd2 Qd6 23.d4 Bd7 24.Ne5 Bb5 25.Rfe1 Bc6 26.Nxc6 bxc6 27.Re5 Ng6 28.Rc5 Rac8 29.Qe2 Kh7 30.Qa6 Ne7 31.Qxa7 Ra8

4. (0.85): 18...Bd7 19.c3 Qg7 20.Nc5 Nd5 21.Qd6 Nf6 22.Rae1 Rfe8 23.Nxe6 Bxe6 24.Rxe6 Rbd8 25.Rxe8+ Rxe8 26.d4 h5 27.Kg1 Qe7 28.Qxe7 Rxe7 29.Bf3 Kf7 30.c4 Ng4 31.c5 Kf6 32.h3 Ne3 33.Re1 a5 34.d5

Komodo finds ... Ra8 a small improvement over ... Bd7, but prefers ... Nc6 as Black's best option at move 18.

Nov-21-12  talisman: strange black rook.
Jul-16-13
Premium Chessgames Member
  plang: This whole variation has scored very poorly for White. According to this database 6..d6 was a new move. One problem Black had in this game was was playing 5..Rb8 without the logical ..b5 follow-up. The sacrifice 9 e5! is today considered to be thematic in this type of position; Bronstein was apparently the first to play it. Perhaps Keres should have eclined the pawn with 9..d5. 16..Rb8 was slow; alternatives include Bronsteins suggestions of 16..Nc6 and 16..e5 as well as 16..f5 or 16..Nf5 followed by ..h5. the alternative 17..Bd7 18 c3..Qa4 19 b3..Qc6 20 Nf6+..Kg7 21 Qxc6..Bxc6 22 Bxc6 would have cost Black the exchange. 18..Bd7? lost the exchange with no compensation but, at this point, White already had a big edge. 43 Rb8+..Kg7 44 R8b7..Rf6 45 Kg1 would have won at once.
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