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Oldrich Duras vs Peter Petrovich Saburov
Ostend (1906), Ostend BEL, rd 7, Jun-12
Formation: King's Indian Attack (A07)  ·  1-0

ANALYSIS [x]

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sac: 27.Bxh7+ PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
Dec-11-19
Premium Chessgames Member
  al wazir: Obvious.
Dec-11-19  Steve.Patzer: Well, not so obvious after Bxh7+ Kf8.
Dec-11-19
Premium Chessgames Member
  FSR: I agree with the dog. And on <Steve.Patzer>'s suggested 27...Kf8, 28.Bg6 is strong.
Dec-11-19  jith1207: I struggled on yesterday's puzzle, as I didn't recognize the pattern. This one is an instant identification.
Dec-11-19  saturn2: 27 Bxh7+ 

retaking leads to mate
....Kxh7 28. Bxg7+ Kxg7 29. Qh6+ Kg8 30. Qh8#

similar is
....Kh8 28. Bg6 Rf8 29. Bxg7+ Kxg7 and so on

...Kf8  28. Bg6 exchange won

Dec-11-19  Carrots and Pizza: Easy one, but what if black doesn't take on h7?
Dec-11-19  saturn2: White had a strong kingside attack and black no counterplay.

If white prepares an attack like this with f4, doubling rooks on the f file maybe not castling as black and play h5 is better.

Dec-11-19
Premium Chessgames Member
  agb2002: White has the bishop pair for a bishop and a knight.

The rook on h5 x-rays h7 and h8. This suggests 27.Bxh7+:

A) 27... Kxh7 28.Bxg7+

A.1) 28... Kxg7 29.Qh6+ Kg8 30.Qh8#.

A.2) 28... Kg8 29.Rh8+ Kxg7 30.Qh6#.

A.3) 28... Kg6 29.Qh6#.

B) 27... Kf8 28.Bg6 wins and exchange and a pawn.

C) 27... Kh8 28.Bg6 (28.Bxg7+ looks also winning)

C.1) 28... Rf8 29.Bxg7+ Kxg7 (29... Kg8 30.Rh8+ Kxg7 31.Qh6#) 30.Qh6+ Kg8 31.Qh8#.

C.2) 28... Kg8 29.Bxg7 Rxg7 (29... Kxg7 30.Qh6+ Kg8 31.Qh6#) 30.Qh6

C.2.a) 30... Kf8 31.Qh8+ Rg8 32.Qxf6+ Rf7 33.Qxf7#.

C.2.b) 30... Rxg6 31.Qxg6+ Rg7 (31... Kf8 32.Rh8#) 32.Qh6

C.2.b.i) 32... Kf7 33.Rg5 Ne8 34.Rxg7+ Nxg7 35.g5 f5 36.h5, followed by Qg6 and h6, is winning.

C.2.b.ii) 32... Rxg4+ 33.Kh2 Ne8 (33... Qf8 34.Qh7#; 33... Qe7 34.Qh8+ Kf7 35.Rh7+ Rg7 36.Rxg7#) 34.Qh8+ Kf7 35.Rh7+ Rg7 (35... Ng7 36.Qxd8) 36.Rxg7+ Nxg7 37.Qxd8 wins.

Dec-11-19
Premium Chessgames Member
  agb2002: I missed a quick mate in my line C.2.b: 31.Qh8+ Kf7 32.Rh7+ Rg7 33.Rxg7#.
Dec-11-19
Premium Chessgames Member
  An Englishman: Good Evening: After 13.Raf1, Black might have had no choice but to sacrifice a pawn with 13...Nxe2+; 14.Nxe2,exf4; 15.gxf4,f5 (ignoring the en prise pawn on b2); 16.exf5,gxf5!?(Bxf5!?); 17.Bxb7,Rb8; 18.Bd5+. Allowing White to play f4-f5 looks even worse, as it lets all of Duras's pieces gain easy access to the Black King. If 15...Bxb2; 16.c3,Ba3; 17.f5 offers a pawn to continue the attack *and* shut out the Ba3 from the action. Won a lot of blitz games playing the same attack.
Dec-11-19  EIDorado: Simple.
Dec-11-19  patzer2: Well played game by White, who executes a clear plan to slowly overwhelm and attack Black's kingside.

White's better development and control of space leads to today's Wednesday puzzle solution 27. Bxh7+! +-, with a decisive attack against Black's weak castled position.

P.S.: Black's game starts to go bad with 8...e5?, which becomes a target for an immediate 9. f4 ± or a slightly delayed 9. 0-0 Nd4 10. f4 ±. The result is a slow but sure White attacking build-up that is hard to counter.

Instead of 8...e5?, Black can improve with simple development via 8...0-0 = or executing a plan of aggressive Queenside counterplay with 8...b5 = or 8...Rb8 =.

A move earlier, instead of 7...Bd7 8. Be3 =, I slightly prefer 7...0-0 8. Be3 Rb8 = as in Black's win in V Fedoseev vs A Giri, 2019.

Of course Black wasn't lost that early in the opening. The clear losing move was the passive 13...b6?, allowing 14. f5! +- (+2.32 @ 30 ply, Stockfish 10).

Instead, 13...Nxe2+ 14. Nxe2 exf4 ± (+0.82 @ 28 ply, Stockfish 10) would've given Black a fighting chance.

Dec-11-19  Walter Glattke: White threatens 27.Bxh7+ Kxh7 28.Bxg7+ Kxg7 29.Qh6+ Kg8 30.Qh8# B) 28.-Kg8 29.Qh6 Rxg7 30.Rxf6 Rh7 31.Rg5+ Kh8 32.Rf8+ Qxf8 33.Qxf8# B2) 30.Qh8+ Kf7 31.QxQ winning C) 27.-Kf8 28.Bxg7+ Ke8 winning C2) 28.-Kxg7 29.Qh6+ Kh8 30.Bg8+ Kxg8 31.Qh8# This is my typical BLITZ, hope, this is correct.
Dec-11-19  Carrots and Pizza: After 5.Nge2 it seems like White is trying to playing Steinitz' defense to the Ruy Lopez with colors reversed.
Dec-11-19  Lambda: <Easy one, but what if black doesn't take on h7?>

Then at the very least, white has won a free pawn, so the move is obviously correct.

Dec-11-19  mel gibson: Stockfish 10 says mate in 28.

27. Bxh7+

(27. Bxh7+ (♗f5xh7+ ♔g8-f8 ♗h7-g6 ♖e7-d7 ♗h6xg7+ ♖f7xg7 ♖h5-h8+ ♔f8-e7 ♕d2-h6 ♕d8xh8 ♕h6xh8 ♖g7xg6 ♕h8-h7+ ♔e7-d8 ♕h7xg6 ♘c7-e8 g4-g5 f6-f5 ♖f1xf5 ♖d7-g7 ♕g6-h6 ♖g7-e7 ♕h6-f8 e5-e4 ♖f5-f6 e4xd3 ♖f6xd6+ ♔d8-c8 ♕f8xe7 ♘e8xd6 ♕e7xd6 d3-d2 ♕d6-e6+ ♔c8-b7 ♕e6-e7+ ♔b7-c8 ♕e7-e2 b6-b5 c4xb5 ♔c8-c7 ♕e2xd2 c5-c4 d5-d6+ ♔c7-d7 ♕d2-d5 a7-a6 b5xa6 c4-c3 b2xc3 ♔d7-e8 d6-d7+ ♔e8-d8 a6-a7 ♔d8-c7 d7-d8♕+) +M28/50 652)

Dec-11-19  Cheapo by the Dozen: After uncharacteristic difficulty early in the week, I nailed this one, at least to the extent of <Lambda>'s comment. However, I think it's worth adding that the pawn in question is passed and not so easy to stop from advancing, especially w/o loss of additional material, and that some of White's attack is still ongoing.
Dec-11-19  Rama: Tough,if you thought it was black to move. :)
Dec-11-19  AlicesKnight: I saw the game line, and imagined Black would refuse to take.But not much hope there either....
Dec-11-19  TheaN: After <27.Bxh7+> White demolishes the king side. At the mercy of 27....Kxh7 28.Bxg7+ #3 and 27....Kh8 28.Bg6! #7, Black will have to play <27....Kf8 28.Bxg7+ Rxg7> Kxg7 still leads to mate and Ke8 is hopeless <29.Rxf6 +-> and White goes on with demolishing. Objectively, 28.Bg6 is slightly better but White's dominating regardless (what's the knight doing anyway?).
Dec-11-19  petemccabe: I wonder why Saburov took the bishop? Maybe he would have lost either way, but couldn't he see the resulting mate in two?
Dec-11-19  SpamIAm: <petemccabe>, perhaps he preferred a quick ending instead of hopeless suffering. ;)
Dec-11-19
Premium Chessgames Member
  Breunor: It looks like I'm in good company, I missed Monday but got this one right away.
Dec-11-19  Pedro Fernandez: I can't understand why Petrovich didn't see the mate in three after 27...Kxh7? <Chris> refers above about this. It is not so hard to see that the best move is 27...Kf8.


click for larger view

So I followed analyzing with that move in order to find an advantage clear and decisive for white. Thus, my next move was 28.Bxg7+ Rxg7 29.Rxf6+ Ref7


click for larger view

30.Rxf7+ Kxf7 (<30...Rxf7? 31.Qh6+!>) 31.Rf6+ Ke7 32.Qh6 Rxg4+ 33.Kf2 Qh8


click for larger view

34.Rf7+! (<with this sac I take the black queen>) 34...Kxf7 35.Bg6+ Kg8 36.Bf7+ Kxf7 37.Qxh8


click for larger view

and white wins with ease.

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