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Bartosz Warszawski vs Robert Graca
Najdorf Memorial op (2009), Warsaw, rd 8, Jul-25
Sicilian Defense: Dragon. Yugoslav Attack Panov Variation (B76)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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May-16-15  DanielHoseano: 21. Bc4 Is that good?
May-16-15  Cheapo by the Dozen: The basic idea is

21 Rxh7+ Kxh7
22 Qf7+ Bg7
23 Bd3

and mate quickly follows, due mainly to the threat of Rh1 and secondarily to the threat of Qxg6.

A much better try at defending for Black is

21 Rxh7+ Kxh7
22 Qf7+ Kh6
23 Bd3 Rg8

White now needs to do something about the c1-h6 diagonal. So let's continue with

24 f4 ef
25 g5+ Kxg5
26 Rg1+ Kh6 (to avert Qh7+)
27 Rxg6+

and mate next.

OK. This is hardly an exhaustive analysis, but if I got this far I'd be willing to take my shot at this line over the board.

May-16-15  Cheapo by the Dozen: Looks like the Saturday puzzle that I got was accessible to unusually many other folks as well.

But yes -- most of us, despite seeing the issues on the c1-h6 diagonal, seem to have overlooked <JimFromProvidence>'s defense.

May-16-15  wooden nickel: Black must have seen trouble coming after 20.e5!, maybe that's why he didn't play 20... Bxe5 (instead of dxe5), it loses in a similar manner. ... also tried
21.Bc4 Rxc4 22.Rxh7+ Kxh7 23.Qf7+


click for larger view

but Black can escape to 23... Kh6!

May-16-15  DanielHoseano: Oh thanks wooden nickel
May-16-15
Premium Chessgames Member
  patzer2: Here's my look at the game and the Saturday puzzle (21?) with Fritz:

<18. Bxf6 Bxf6> Better for Black is 18... Bxe4! 19. fxe4 Bxf6 20. Qd5+ =.

<19. Qxd5+ Kg7 20. e5 dxe5?> The decisive error. Instead, Black can hold on with only a small White edge after 20... Bxe5 21. Bd3 Rh8 22. Kb1 Qa4 23. Qe6 Qf4 24. Qxe7+ Qf7 25. Qh4 .

<21. Rxh7+!!> This solves today's Saturday puzzle.

<21...Kxh7 22. Qf7+ Kh6 23. Bd3 Rg8> Got this far with my Saturday puzzle solution try, but calculated a different follow-up than the game continuation.

<24. f4!> Fritz indicates this is strongest, forcing mate-in-seven.

My planned follow-up was 24. Rh1+ Kg5 25. Qh7 , which Fritz shows forcing mate-in-18.

<24...exf4>

If 24...Bh4, then 25. g5+ Bxg5 (25... Kh5 26. Be2#) 26. Rh1+ Bh4 27. Rxh4#.

<25. g5+ Kxg5>

If 25... Kh5, then 26. Qh7+ Kg4 27. Rg1+ Kf3 28. Qh3+ Kf2 29. Rf1#.

<26. Rg1+ Kh6 27.Rxg6+ 1-0>

Black resigns in lieu of 27...Rxg6 28.Qxg6# or 27...Kh5 28.Qh7#.

May-16-15  HaydenB: I didn't find this very difficult at all. I saw the rook sac theme on h7 followed by the Queen to f7 in less than 10 seconds. I was hoping however that the Bishop could find his way to c4, a la Kurt Richter, but after a few more seconds realized the Queen and Rook could not mate by themselves.
May-16-15
Premium Chessgames Member
  Penguincw: I got 21.Rxh7+ Kxh7 22.Qf7+ (any) 23.Bd3, and eventually got the idea of bringing the rook over to the kingside.
May-16-15  gars: I completely agree with <HaydenB>. I did not solve it by I saw five of the seven moves of the combination and I am a weak player.
May-16-15  morfishine: I figured after <21.Rxh7+> Black is toast after 21...Kxh7 22.Qf7+ since White has 23.Bd3 followed by 24.Rh1+

*****

May-16-15  paavoh: Yes, I agree: a bit easy for a Saturday. Rxh7+, Qf7 is standard, so finding a simple Bd3 to attack g6 and open the route for R to h1 was sufficient.
May-16-15  Tiggler: I did not see 24.f4, which is a brilliant way to finish, but 24.Rh1+ also wins.
May-16-15
Premium Chessgames Member
  Sally Simpson: A success! went with the Bg5+ line defended g6 with Rb6 but everything works and I got the key moves.

Those that say today was easy....have you considered that you may be getting better!

May-16-15  Tiggler: <patzer2> Did Fritz not see that 23. ..Bg5+ holds out longer? There is no forced mate then, but a Q+4p vs R+4p ending.
May-16-15
Premium Chessgames Member
  kevin86: Even for a Saturday, the key was obviously. When the king is trapped along the side, an early demise for black is inevitable.
May-16-15
Premium Chessgames Member
  Jimfromprovidence: <Sally Simpson> <...went with the Bg5+ line defended g6 with Rb6...>

Thanks for pointing that out. I assume you meant 23...Bg5+ 24 Kb1 Rb6.


click for larger view

I did not think of 24...Rb6. Unfortunately, it is now a forced mate for white.

But it made me figure out why 24...Qb6 is the only playable move here.

This is a richer puzzle than some imagined.

May-16-15
Premium Chessgames Member
  chrisowen: Clears up black pawns at punt 24.f4 exf4 or ave chucks queen at a d2 or e1 mind you rovers f7 at good fluffers am manage flighter off at be check,

25.g5+ line jovial i money pots glean away bags gives and i glory back gutoff lean ive monarch on the run ive the point g6 angle glorify oh

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bide g5 time lift rook as wheel ive got garbles away am light wins a g6 it was in whip arrive among garage spark calm good flange tyre wheel g6 as given gallway i wish for a quick

demise f7 an d3 plus ave g1 etc able wire bus around up on time thod carry am light g6 as ave glorify oh door as put inter glides away am takes the biscuit uniform in appraisal you vet f7 an d3 at escape 26...Kh6 27.Rxg6+ mate-in-1 butterfly a knife g6 angle good back jog on join choose it in given monarch brat alive h6 as no more g5 i saint queen and rook gas am glorify i shape back tom catch g6 bap clench back for cab again vet middle over bad counter gash lib an d3 works well ive inter g6 amen tints away am glasses amply g6 as won code rade move augers well complex ive choice combine,

bottle ja ship lovely any revver f7 do deft touch go hook h5 angle give vows hearts and hanger am true as delight ramble give spark cove wads back que need it eddy a wave i dark dock ash g8 as mate-in-seven flurry am for lovely sic classic dispatch an d3 as wander f7 around among g6 agile,

target rook as wheel ive cascadence wallow-on mate-in-seven tout du suite wash mass so ive beyond gauge g6 com hip mince around did hope h5 at hive wads dote header monarch safe babel g6 towers f7 above g6 etc able wire,

bus link g8 bad as wash i i captain skim palm cone cart back rob band bereft of options inter glide g6 barge gangway am from tide an fetch band three pieces converge give basic band you glorify at wins f7 angle g6.

May-16-15  M.Hassan: "Very Difficult"
White to play 21.?
White is a pawn down.

The open h file and posssibility of a Queen check suggests a Rook sac.:

21.Rxh7+ Kxh7(forced if not:...Kf8 22.Qf7#)

22.Qf7+
A) 22..........Kh8
23.Bd3 Bg7
24.Rh1+ Bh6
25.Rxh6#

B) 22...........Kh6
23.Bd3 Rg8
24.g5+!
B.1)
24...........Bxg5
25.Rh1+ Bh4
26.Rxh4+ Kg5
27.Rg4+ Kh5
28>Bxh6+ Rxh6
29.Qxh6#

B.2)
24...........Kxg5
Looks like in this line the King can run away. I must have overlooked pushing the g pawn ahead, apparently first f pawn should have been pushed. I probably give myself 50% credit!!

May-16-15
Premium Chessgames Member
  Longview: I thought I needed to join the two white rooks before I did the Rxh7+ sac. I wanted to attack on the h file. I did not see, the concept, method or need to remove the pawns from the g file. My move was B-d3 but I thought the reply would be R-h8 and I was stuck on how to get the second rook involved. As usual, part of the angle. I am starting to think I am a one eyed drone. Good vision but no depth perception.
May-16-15  vajeer: <Jimfromprovidence:> After 23...Bg5+ , better is 24. f4 24...Bxf4+
25. Kb1 Qb6
Now
26. Qxe7
Black cannot avoid mate now.
May-16-15
Premium Chessgames Member
  patzer2: <Tiggler> Thanks for suggesting a look at 23...Bg5+ with Fritz. I confess I didn't run the program on that move, since 23...Rg8 was played in the game and seemed a natural, intuitive human response.

P.S.: Fritz confirms the Houdini assessment that 23...Bg5+ reduces to a won Queen & pawns versus two Rooks & pawns middle game. Fritz 12 gives 23... Bg5+ 24. Kb1 Qb6 25. Rh1+ Bh4 26. Bxg6 Qxg6 27. Rxh4+ Kg5 28. Rh5+ Qxh5 29. Qf5+ Kh4 30. gxh5 Kg3 31. h6 (+3.81 @ 17/41 depth).

May-16-15
Premium Chessgames Member
  agb2002: White is one pawn down.

The first idea that comes to mind is 21.Rxh7+ Kxh7 (21... Kf8 22.Qf7#) 22.Qf7+ Kh6 (22... Bg7 or 22... Kh8 23.Bd3 and mate soon) 23.Bd3

A) 23... Bg5+ 24.Kb1

A.1) 24... Rg8 25.Rh1+ Bh4 26.Rxh4+ (or 26.Qxe7 Qe1+ (26... g5 27.Qh7#) 27.Rxe1 Bxe1 28.Qxe5 + - [Q+2P vs 2R]) 26... Kg5 27.Qxe7+ Kf4 28.Qf6+ with compensation for the exchange looks very good. For example, 28... Kg3 29.Rh1 Qc7 30.Qh4+ and mate soon.

A.2) 24... Qb6 25.Rh1+ Bh4 26.Qxe7 seems to win. It looks more complicated 26.Rxh4+ Kg5 27.Qxe7+ Kf4 (27... Qf6 28.f4+ exf4 29.Rh5+ Kxg4 (29... gxh5 30.Qxh5#) 30.Qxf6 + -).

B) 23... Rg8 24.f4 exf4 (24... Bh4 25.Rh1 g5 26.Qh7#) 25.Rh1+ Kg5 (25... Bh4 26.Rxh4+ Kg5 27.Qxe7#) 26.Qh7 (26.Rh5+ gxh5 27.Qxh5# is very nice but Black can play 26... Kxg4) 26... f3 (26... Kxg4 27.Qh3+ Kg5 28.Qh4#; 26... Rh8 27.Qxg6#) 27.Qh6+ Kxg4 28.Rg1#.

C) 23... Kg5 24.f4+ looks promising. For example, 24... Kxf4 25.Qxg6 Rg8 26.Qf5+ Ke3 27.Rf1 with the double threat 28.Qe4# and 28.Qf2#.

May-16-15  Moszkowski012273: Anybody actually ever read this gentlemans stuff?
May-16-15  dfcx: <vajeer:...better is 24. f4 24...Bxf4+ 25. Kb1 Qb6
Now
26. Qxe7
Black cannot avoid mate now.>

Black wins now with 26...Qb7!


click for larger view

May-17-15  RandomVisitor: After the improvement 18...b4:


click for larger view

Rybka 4.1 x64:

<[+0.07] d=25 19.Rxd5> exf6 20.Qd2 Qa4 21.Rd4 Qb3 22.axb4 f5 23.Kb1 Rxc2 24.Qxc2 Qxc2+ 25.Kxc2 Bxd4 26.exf5 Rxb4 27.b3 d5 28.Bd3 Rb6 29.Rd1 Rc6+ 30.Kb1 Bb6 31.Be2 gxf5 32.Rxd5 fxg4 33.fxg4 Rc5 34.Rd6

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