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Jun-01-16 kingberzerk : Does 22 Rb2 work as well?

May-13-17 GrahamClayton : I would be very happy to have a passive Queen sacrifice followed by a see-saw attack in one of my games!

Jan-27-18 devere : Very pretty but not very difficult. Not many chess players would miss the opportunity to play 19.Ba6!!. Black must have missed 26...R(d)f8 27.R(h)b1 Kd8,or he would have played on. Better for White was 25.Bd5+ Kc8 26.Bc4.

Jan-27-18 ChessKnight12 : 26...Rdf8 27. Rhb1 Kd8

This in not the end. Is not it?

For example:

28. Rb8+ Bc8 29. Bb7 Qf6 30. Rxc8+ Ke7 31. Rxc7+ Kd8 32. Rd7+ Ke8 33. Bc6

Jan-27-18 Steve.Patzer : If 26....Rdf8 27. Bxd7+ spoils your line.

Jan-27-18

patzer2 : Fairly easy to see that 19. Ba6!! is a promising continuation with equality or better for White after 19...bxa6 20. Nxc6 Bxc6 21. Qxc6 +- or the game continuation 19...gxf3 20. Bxb7+ +-. Visualizing that 19. Ba6!! is a crushing win and finding decisive follow-up moves is what makes this (19. ?) a difficult Saturday puzzle. P.S.: Black's decisive error appears to be castling into the attack with 16...0-0-0? and allowing 17. Ne5 +- (+1.99 @ 28 ply, Stockfish 8). Necessary instead is 16...f5 17. Qc2 ± (+0.85 @ 28 ply, Stockfish 8). Earlier, 9...Nc6 10. e3 Bxc3+ 11. bxc3 = (0.00 @ 29 ply, Stockfish 8) apparently improves over 9...Bxc6 10. bxc3 ⩲ (+0.36 @ 28 ply, Stockfish 8).

Jan-27-18 karik : Jeez! Just noticed that I can move pieces in Olga. Great!

Jan-27-18

Richard Taylor : I have to say I didn't solve this one. I thought it ws 19. Rxb7...missed the reply Nxe5... I also thought 19. Ba6 might lead to a won ending. But I forgot about it thinking 19. Rxb7 was the ticket. Oh well at least a bit of exercise for what's left of my brain cell; and my old and rather muddled wuddled sleepy wooden head!

Jan-27-18 gofer : <It's Queen Sac. It's Queen Sac. It's Saturday and it's Queen Sac!!!> <19 Bh6 ...>

19 ... Na5?

20 Bxb7+ Kb8

21 Bc6+ Kc8

22 Bxd7+ Rxd7/Qxd7

23 Qa8#

19 ... Any other knight move?

20 Qxb7#

19 ... Be8?

20 Bxb7+ Kb8

21 Bxc6+ Kc8

22 Bb7+ Kb8

23 Ba6+ Bb5

24 Rxb5#

19 ... Rdg8?

20 Bxb7+ Kd8

21 Nxc6+ Bxc6

22 Qxc6 +-

So the queen sacrifice seems to be unavoidable!!! Yeah!!! <19 ... gxf3>

<20 Bxb7+ Kb8>

<21 Bxc6+ Kc8>

<22 Bb7+ Kb8>

Now we have lots of choices, but I like one more turn of the windmill... <23 Bxf3+ Kc8>

Again we could line up another turn of the windmill, but I think I prefer to bring in the big guns!

<24 Rb7 ...>

The main threat is Rhb1 and then Rb8#, but we also have Rxa7 and then Ra8#. The black LSB is completely overpowered and has only got e8 and a4 as safe squares, both of which acheive next to nothing and white can now casually play c6 forcing yet another piece to come off or creating a coffin for black's king. Rd8 is probably going to go to g8 to attack Pg3 and also protect against the Ng6 fork, but really it all looks very bad for black. White has all the choices and all the threats. White is down a queen for a knight and two pawns, but white's pieces are so dominant I think its a more than fair trade. But I am in 5 moves already and the rest is going to be guess-work.

24 ... c6

25 Rxa7/Rhb1/Bxc6 all seem to be fine for white. 24 ... Rg8

25 c6 Be8

26 Rhb1 +-

24 ... Be8

25 c6 Bxc6

26 Bxc6 +-

~~~

Hmmm, okay 95% right. Not bad for a <Saturday>

Jan-27-18

Richard Taylor : I won a game as Black playing this Idea of Black's although I didn't play 8. ... h5, I doubled two pawns of White's...and eventually won. I always have a feeling it is a bit ambitious but it is one way of playing such positions.

Jan-27-18

Richard Taylor : Very clever combination. It had to involve a Q sac as White needs to bring pieces to the attack quickly. Dubov played well. 19. Ba6! A bolt from the blue!

And the engine approves of it and grinds out all the great variations for thousands of moves in all directions proving it to be totally sound....

Jan-27-18 mel gibson : I saw that one in about 10 seconds.

You could see how trapped the Black King would be. Stockfish 8 says:

19. Ba6

(♗f1-a6 g4xf3 ♗a6xb7+ ♔c8-b8 ♗b7xc6+ ♔b8-c8 ♗c6-b7+ ♔c8-b8 ♗b7xf3+ ♔b8-c8 ♗f3-e2 ♗d7-b5 ♗e2xb5 ♖d8-d6 c5xd6 ♕e7xd6 ♗b5-d7+ ♕d6xd7 ♘e5xd7 ♔c8xd7 ♖h1-e1 ♖h8-a8 ♖e1-e5 a7-a5 ♖b1-e1 ♖a8-a6 d4-d5 e6xd5 ♖e5xd5+ ♖a6-d6 ♖d5xf5 ♖d6-h6 ♖f5-d5+ ♔d7-c6 ♖d5xa5 ♔c6-d7 ♖a5-d5+ ♔d7-c6 ♖e1-e5 h5-h4 g3-g4 ♖h6-h8 g4-g5 ♖h8-f8+ ♔f2-e3 ♖f8-a8 ♖d5-a5 ♖a8-g8 ♖a5-c5+ ♔c6-d6 ♖c5-d5+ ♔d6-c6 ♔e3-d4 ♔c6-b6) +10.29/35 88)

score for White +10.29 depth 35

Jan-27-18 Moszkowski012273 : 24.Be2... is also insanely strong.

Jan-27-18

agb2002 : The material is identical.

Black threatens gxf3.

The first idea that comes to mind is 19.Ba6:

A) 19... gxf3 20.Bxb7+ Kb8 21.Bxc6+ Kc8 22.Bxd7+ A.1) 22... Rxd7 23.Nc6 and the double threat Rb8# and Nxe7+ wins decisive material (23... Rdd8 24.Nxe7+ Kd7 25.Ng6 fxg2 26.Kxg2 + - [N+P]). A.2) 22... Qxd7 23.Nxd7 Rxd7 24.gxf3 + - [2P].

B) 19... bxa6 20.Nxc6 Bxc6 (20... gxf3 21.Rb8#) 21.Qxc6 B.1) 21... Qe8 22.Qxa6+ Kd7 23.Rb7 Ke7 (23... Qe7 24.Rxc7+ Kxc7 25.Qxa7+ and 26.Qxe7 wins) 24.Rxc7+ wins three pawns at least. B.2) 21... Rdf8 22.Rb7 and the threat Rhb1 looks winning (22... Qd7 23.Rb8+ Kxb8 24.Qxd7 wins; 22... Qe8 23.Qxc7#). C) 19... Na5 20.Bxb7+ Kb8 (20... Nxb7 21.Qxb7#) 21.Ba6+ and mate in two.

Jan-27-18

agb2002 : I missed the intermediate 23... fxg2 in my line A.2. Therefore, it was preferable to eliminate the f-pawn with check before trying Bxd7+. However, after Bxf3+ the maneuver Be2-Ba6 looks stronger.

Jan-27-18 saturn2 : 19 Ba6

It is not good for black not to take the bishop. But it is also not good for black to take the bishop.

Jan-27-18

Jimfromprovidence : White missed several chances in the text line to improve his position. The idea is with the king on c8, to get the bishop to a6, threatening mate. So after the text 22...Kc8 white had 23 Bd5+.

click for larger view After 23...Kc8 then 24 Bc4 below follows, with the threat of 25 Ba6#.

click for larger view Black has to give up a lot of material to stop the threat. White could have implemented the same idea after the text 23 Bxf3+ Kc8 with 24 Be2.

click for larger view

Jan-27-18

Breunor : I found Ba6 in a few seconds; but I'm pretty certain I wouldn't have found it if I hadn't been told 'white to play and win'. Armed with that hint, Ba6 seems pretty clear.

Jan-27-18 sfm : I wonder if 18.Qf3 is imprecise? After 18.Qf3,Rdg8 Black gets an escape-square for the king. So maybe 18. Ba6 is a stronger move?

After 17.Ne5 we know the dangers. Maybe 17.-,Qe8 is the move? Going backwards it is not so easy to see what Black should have done. The White Queen is dominating on e4, Black has weakened his K-side and the open b-file is nasty if he puts his king there. Difficult position to play.

Jan-27-18 njchess : I saw 19. ♗a6 right away, though I did not like the idea of losing the Queen. However, the windmill that results seemed to compensate. I thought Black might escape with the sequence of 26. ... ♗x♗ 25. ♘x♗, but then I saw Black could not stop White from playing 27. ♘e5 ... 28. ♖h1b1 ... 29. ♖b8++. Game over.

Jan-27-18 cormier : patzer2:

P.S.: Black's decisive error appears to be castling into the attack with 16...0-0-0? and allowing 17. Ne5 +- (+1.99 @ 28 ply, Stockfish 8). Necessary instead is 16...f5 17. Qc2 ± (+0.85 @ 28 ply, Stockfish 8). Earlier, 9...Nc6 10. e3 Bxc3+ 11. bxc3 = (0.00 @ 29 ply, Stockfish 8) apparently improves ... ths

Jan-27-18 stst : Need the courage to sac the Q!!

19.Ba6

IF (A)........ gxQ

20.Bxb7+ Kd8

21.NxN+ BxN

22.BxB+ Kc8

23.Rb7 fxg2

24.Kxg2 any

25.Rh1b1 no defense for Rb8, other pieces shut-off from rescue. IF(B)19.............bxB

20.NxN BxN

21.QxB and Qa8 and/or double up the R's will be devastating... Black has to give up materials to prolong the game. see how it goes ...

Jan-27-18 stst : <...at least a bit of exercise for what's left of my brain cell; and my old and rather muddled wuddled sleepy wooden head!> getting old is not so scared as getting crystallized in thought... Fundamental methods suggests try DIFFERENT things.... The very first move is important, therefore try if 1, or 2, or 3, or 4, ...etc etc and follow up with all variations from there. Of course - all amount to "home" work... just like a student solving a math problem, it takes time to explore different approaches... That's the distinction between a master from us novices... The higher the master, the sharper the instinct and calculation, all done within the brain to compare different lines --- right there (easier said than done of course!!)

May-16-20 seneca16 : White will put black away by EITHER Rb8 + followed by the fork Nxc6 OR Rb1 followed by Rb8+.

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