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Karl Robatsch vs Francisco Jose Perez Perez
Capablanca Memorial 2nd (1963), Havana CUB, rd 10, Sep-08
Pirc Defense: Austrian Attack. Weiss Variation (B09)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 2 ·  Later Kibitzing>
Aug-06-10  Whitehat1963: A different kind of Monday/Tuesday puzzle after 18...Nxe4.
Dec-14-10  Blunderdome: f6! pins the e4-Knight because of the attack on h7.
Dec-14-10
Premium Chessgames Member
  Phony Benoni: The old block play after 19.f6 Nxf6 20.Rxf6! The f-pawn is blocked, and Black hasn't time for 20...e4 because his queen is attacked.

If 19...Bxf6 20.Qxe4 exploits the block again. Or 19...Nxg5 20.Qxg5 Ne6 21.Qf5.

Very reminiscent of Fischer vs Benko, 1963, and I think this game would have been played earlier in the year. Think Fischer may have seen it?

Dec-14-10  Nullifidian: Chessgames has been making it difficult on us. There hasn't been a clear mate yet.

Nevertheless, I saw the key move immediately, and it didn't take long to work out the consequences:

19. ♙f6! and now Black has two main continuations, as far as I can see:

19... ♘xg5 20. ♕xg5 ♘e6 (defending both g7 and attacking the queen) 21. ♕f5 and now Black's best option is to lose the queen for a bishop in order to stave off mate.

19... ♘xf6 (not ♗xf6? 20. ♗xe4, which is mate in 4) 20. ♖xf6 and the rook is immortal due to the threat of ♕xh7#.

Dec-14-10  rilkefan: Nice puzzle - Tuesday-level because the winning move is the most natural on the board, but involving a messier position than usual for the day.
Dec-14-10  TheBish: Robatsch vs Perez, 1963

White to play (19.?) "Easy"

White is down a piece, but could easily regain it with Bxe4 or Qxe4. But with the indirect attack on h7 by both the queen and bishop, I found a better move.

19. f6!

Opening up the b1-h7 diagonal for the bishop. Now the knight on e4 is pinned (19...Nxf2 20. Qxh7#), but other moves lose material or get mated as well.

A) 19...Nxg5 20. Qxg5 Ne6 (only move to stop mate without giving up the queen) 21. Qf5 e4 22. Bxe4 and mate can only be stopped by giving up heavy material (22...Ng5 23. Qxg5 Qxf6 24. Rxf6). Or Black could have played 21...Qxd3 22. cxd3 Bh6, maybe the best option here, but still down a queen for two pieces.

B) 19...Nxf6 20. Rxf6! wins the queen or mates.

C) 19...Bxf6 (or 19...Bh8) 20. Qxe4 Nf5 (only move to stop mate) 21. Qxf5 Qxd3 (forced) 22. cxd3 and White is up a whole queen!

I think that exhausts it. As the saying goes, time to...

Dec-14-10  M.Hassan: "Easy" White to play 19.?
White is one piece down (a Knight)

If digonal b1h7 becomes clear for White so that Bishop d3 can eye h7 with no obstruction, there is obviously a mate in there. There are two pieces on the way. A black Knight and a White pawn. White can move his own pawn on move 19:

19.f6 Nxf6 (N now supports h7)
20.Bxf6 The diagonal is now clear and
Black can not stop checkmate or may be only by
20....... Nf5
21.Bxf5 Qxf6
22.Qxh7#
Study shows that 19....Bxf6 will have the same consequence. Time to check
-------------
Perez saw the deadly threat and thought defending is futile and resigned on move 19!.Good Man

Dec-14-10  SamAtoms1980: 19 f6! and the Robatsch conquered the human.
Dec-14-10  M.Hassan: This puzzle illustrates the fact that going after pieces or aiming for "equalization" in chess can cost missing a win. White could easily equalize in forces by: 19.Bxe4 f6
20.Bh6 Bxh6
21.Qxh6
and there isn't a clear light at the end of the tunnel for White.
Dec-14-10
Premium Chessgames Member
  Once: Ironic that Robatsch of all people should be demolishing a kingside fianchetto. After all, he did much to popularise the modern/ Robatsch defence (1. e4 g6).

Here he uses a pretty standard attacking plan against his trademark defence - the f pawn hack. Double rooks along the f file, pin and then win the Nf6, chuck your f pawn up the board, point your bishop and queen against h7. Bake in a medium oven...

It has to be said that black speeds up white's winning process with moves like 16...gxf5 (voluntarily moving the crucial g6 pawn) and 17...b4 (kicking the Nc6 onto a square it wants to go to anyway).

And black was so looking forward to 19. Bxe4 f6 when the f file is securely closed. Instead Robatsch ignores the exchange of knights, siezes f6 for himself, opens the diagonal to h7 and threatens the Bb7. Not hard to see, but devestating all the same.

Dec-14-10  dzechiel: White to play (19?). Black is up a piece. "Easy."

It looks like the last move was 18...Nxe4, with black expecting white to simply recapture with 19 Bxe4.

But white has a much better move!

19 f6

This has the big advantage of opening the b1-h7 diagonal. Now white has two threats:

- 20 Bxe4
- 20 fxg7

Black has several tries, but they all come up short:

19...Nxf6 20 Rxf6

on the queen and threatening 21 Qxh7#. Or...

19...Nxg5 20 Qxg5

threatening 21 Qxg7#

20...Ne6 21 Qf5

You get the idea. I'm sure this was it. Time to check.

Dec-14-10  Arindam Banerjee: Another off-Track Tuesday Puzzle!!!! I got it after some 5 minutes of thinking!!!! I was trying for something even simpler!!!! But then in the end decided to go for the obvious f6!!! Strange week till now!!!!
Dec-14-10  scormus: The hardest thing about this puzzle was avoiding the temption tpo spend a lot of time on 19 Qxh7+.

A nice example of W pushing the f-pawn to undo B's K-fianchetto defence. And B cooperated rather nicely with this strategy.

There was a time when I played the Closed Sicilian and do the job using the f-pawn. After while I gave up after I found so many players knew how to defend against it

Dec-14-10  Confuse: A lot of different bad endings for black here after the solution. Good times.
Dec-14-10  stacase: Super easy! No matter how Black takes that pawn, White has an answer leading to mate.
Dec-14-10
Premium Chessgames Member
  whiteshark: 19.f6! and the Black position crushes.
Dec-14-10  gofer: Bd3 and Qh4 are poised to give mate on h7, but currently Ne4 and Pf5 are both in the way. Now white has a veritable arsenal pointing at f6, but only two of them are effective currently. What we would really like is Pf5 to be on f6, then we would open up the all important b1-h7 diagonal AND pile another two pieces into the support of Pf6.

19 f6 ...

19 ... Nxf2 20 Qxh7#

19 ... Nxg5 20 fxg7 f6 (Kxg7 21 Qxg5+ Kh8 22 Rxf7 mating) 21 gxf8=Q+ Rxf8 (Kxf8 22 Rxf7+ Kg8 23 Qxg5+ winning) 22 Qxg5+ winning

19 ... Nxf6 20 Rxf6! winning the queen or mate

19 ... Bxf6 20 Bxf6 Nxf6 21 Rxf6 winning the queen or mate

19 ... Ne6/Bh8/h6 20 Nxe4! and from here its a slaughter

There are lots of variations for black's reply, but they all seemed to be disasterous. Time to check.

Dec-14-10  euripides: For the same idea on the same move in the same variation and the same year:

Fischer vs Benko, 1963

Dec-14-10  gofer: Apologies about...

<19 ... Nxg5 20 fxg7 f6 (Kxg7 21 Qxg5+ Kh8 22 Rxf7 mating) 21 gxf8=Q+ Rxf8 (Kxf8 22 Rxf7+ Kg8 23 Qxg5+ winning) 22 Qxg5+ winning>

Its garbage. But 19 ... Nxg5 is the most interesting line. Both 20 fxg7 and 20 Qxg5 are good, but black has interesting options to delay mate...

Dec-14-10  zb2cr: I found this one. See comments by <Phony Benoni>, <Nullfidian>, <TheBish>, <M.Hassan>, <Once>, <dzechiel>, and <gofer>. Between them, they said everything that I might have said.
Dec-14-10  David2009: Robatsch vs Perez, 1963 White 19? Black is temporarily a N up and has presumably just captured a N on e4 hoping for 19 Q(or B)xe4? f6 with survival chances. Instead, White has 19 f6! and if 19...Nxg5 Qxg5 the mate threat costs Black his Queen. Meanwhile, Qxe4 is threatened which mates. Time to check:
====
First the good news - Black resigned after 19.f6. Now the bad news: my analysis of the best (only) defence 19...Nxg5 20 Qxg5 is rubbish, becaause I had missed 20...Ne6! Fortunately 21 Qf5! saves the day - kudos to everyone who saw this in full from the puzzle position.

Crafty End Game Trainer check of the puzzle position:


click for larger view

(Robatsch vs Perez, 1963 White to play 19?) http://www.chessvideos.tv/endgame-t... You are White if you want to try out the variations.

Dec-14-10  mrsaturdaypants: Smells like f6 in here.

If the e4 knight moves, Qxh7# ends the game.

Indeed, if black starts any exchanges on f6, he's doomed.

And 19...Bh8 leads to 20 Bxe4.

White only needs to see that 19 Bxe4 f6 is comparatively bad.

Time to check.

Dec-14-10  Patriot: Black is up a piece and threatens 19...Nxf2 or 19...Nxg5.

White could simply play 19.Bxe4 or 19.Qxe4 threatening 20.f6 but black can prevent this with 19...f6. Since the white bishop x-rays through to h7 and the queen is directly attacking it, it makes sense to consider 19.f6.

A) 19...Bxf6 20.Bxf6 (threatening 21.Qg4+) Nxf6 21.Rxf6 (threatening the queen and 22.Qxh7#)

B) 19...Nxf6 20.Rxf6 (threatening 21.Rxd6 and 21.Qxh7#)

C) 19...Nxg5 20.Qxg5 Black must lose significant material to stop mate.

D) 19...Ne2+ 20.Rxe2 Qd4+ 21.Qxd4 exd4 22.Bxf6

---------

There was at least one defense I missed. In line C, 20...Ne6 21.Qf5 wins.

Dec-14-10  knight knight: White's a piece down, but can play 19. Bxe4. However we're looking for a puzzle move, so... 19. f6 looks strong:

a) 19...Bxf6 20. Bxe4 Ne2+ 21. Kh2 and mate on h7 soon

b) 19...Bh8 20. Bxe4 Ne2+ 21. Kh2, mate on h7 soon

c) 19...Nxg5 20. Qxg5 Ne6 21. Qf5 e4 22. Bxe4 mating or winning basket loads of material

di) 19...Nxf6 20. Rxf6 Nf3+ 21. R1xf3 Qd4+ 22. Qxd4 exd4 23. Rxc6 even material, white has some positional advantage

dii) 19...Nxf6 20. Bxf6 e4 21. Qg4 Ne6 22. Bxe4 material even, white has a huge positional advantage, likely mates soon

diii) 19...Nxf6 20. Bxf6 h6 21. Qg4 Ne6 22. Qf5 e4 23. Bxe4 mating or winning basket loads of material

e) 19...h6 20. Bxe4 (pinning the h-pawn) Bxf6 21. Qxh6 Nf5 22. Bxf5 mating

f) 19...Nf5 20. Rxf5 Qd4+ 21. Kh1 Nf2+ 22. R5xf2 Qxh4 23. Bxh4 white is a piece ahead

Not an exhaustive list of defences, but think I've found the main lines.

Tough Tuesday I think! (unless I've chosen the wrong puzzle move)

Dec-14-10  knight knight: Oh, just noticed in my di) line white's actually a piece ahead lol!
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