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Christian Maier vs Rustam Kasimdzhanov
European Club Cup (2011), Rogaska Slatina SLO, rd 4, Sep-28
Formation: King's Indian Attack (A07)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 1 OF 2 ·  Later Kibitzing>
Aug-09-12  raviarun: I saw 31...Bxf4+ almost immediately for a thursdsay puzzle.

If 32.Bxh3, then 32...Be3+ 33.Qf2 Rxf2+ 34.Kg1 Nf3+ 35.Kh1 Rh2# is forced.

If 32.Bxf4, 32...Rxf4+ 33.Kg1 Rxg4 and mate should follow (34.Qe8+ has Bg8 as defense)

If 32.Kg1, 32...Qh2+ 33.Kf1 Be3+, and is a faster mate.

Any other defences ?

Aug-09-12  xthred: Kind of simple, really. But I still couldn't see it. Stupid brain.
Aug-09-12  der623: This is the kind of game you would attribute to Nezhmetdinov. I am a little disappointed that White, a modern day GM, didn't sense that something was up after 34. Bxf4. There is the possibility that White did see what was coming and decided to let Black have his moment.
Aug-09-12  sevenseaman: The killer move is 31... Bxf4. White's normal is;

32. Bxh3 and now;

Be3+ demands a Q sac and still mating;

33. Qf2 Rxf2+ 34. Kg1▢ Nf3+ 35. Kh1▢ Rh2#

The consummate Arabian mate makes an appearance.

In case White is smarter and declines the Q at move 32 we have;

Say 32. Bxf4 Rxf4+ 33. Kg1 Nxg2 34. Qxg2 Rxg4 looks equally good.

In short it seems we have solved the puzzle quite comprehensibly. Any imponderables still? Let them be for later.

Aug-09-12  gm narendra: 31..Bxf4
32.bxh3?? loses immediately
Game can continue with 32.Bxf4 but not for long.
White played 30.f4 to offer for queen exchange but after Qh3+ he should have gone for Qg2 instead of Bg2 making some roam for the white king to run.
Aug-09-12  Patriot: Whenever I look at positions such as this, I think "If a combination is here, then it must stem from move X". "Move X" meets certain tactical criteria. This can save time over looking at each permutation of forcing moves. Black's queen is hanging, and you have to see the f8-rook x-raying through to the king with a bishop aimed at f4. All the while white is also threatening Ne6 or Nd7.

So here's what I think. <31...Bxf4>, threatening a discovered check. This seems to be the most tactical of all the forcing moves in this position.

32.Bxh3 (must be considered first) Be3+ 33.Qf2 Rxf2+ (33.Qf3 Rxf3+ 34.Ke2 and I think black is doing fine) 34.Kg1 Nf3+ 35.Kh1 Rh2#

32.Nd7 Be3+! 33.Nxf8 Rf6+ and mate in a few. For example, 34.Qe3 Qxg2# or 34.Qf2 Rxf2+ 35.Kg1 Qxg2#.

Aug-09-12
Premium Chessgames Member
  An Englishman: Good Evening: This one was difficult until I finally asked myself, "What is the only White piece or pawn which, if it did not exist right now, would lead to immediate collapse?" That put me on the right track, and once I realized it was the f4 pawn, only one more question did the trick: "Is that pawn's removal worth any, I repeat, *any* amount of material?"
Aug-09-12  Patriot: A cute sideline I noticed is 31...Bxf4 32.Bxh3 Be3+ 33.Qf3 Rxf3+ 34.Ke2 Bxd2 35.Bg2 Nxg2. 36.Kxf3 Nxe1+ or 36.Kxd2 Nxe1 .
Aug-09-12  Patriot: In my last line in the first post, sorry...I meant to say 34.Qf3 Qxg2#.
Aug-09-12  M.Hassan: "medium" Black to play 31...?
Black is a pawn down.

Black can start a discovered attack at the cost of his Queen:

31.............Bxf4!
32.Bxh3 Be3+
33.Qf3(or f2)forced Rxf3+
34.Ke2 Bxd2
35.Kxd2 Rxh3
Black now is a Bishop up

Widing back to move 33:
33.Qf2 Rxf2+
34.Kg1 Nf3+
35.Kh1 Rh2#
So defence by 33.Qf3 is better for White.
Another line for White is to take the Bishop and decline taking the Queen:

31..........Bxf4
32.Bxf4 Rxf4+
33.Kg1 Rxg4
34.Qxg4 Qxg4
35.Re8+ Bg8
36.Rc2 Qd1+
And White is close to destruction.
Time to check
______________
It appears that 33.Qf3 was the best of 3 ways that White could defend himself.Although he falls down by a Bishop, but possible loss is at a distant away.Am I correct?

Aug-09-12  Djoker: Great Hassan.
I saw other two lines.
Didn't see Qf3 line....this is probably the best defence for white.Need to check.
Aug-09-12  david p: quite a pretty game, nice
Aug-09-12
Premium Chessgames Member
  agb2002: Black is a pawn down.

White threatens 32.Bxh3.

The pawn shield of the white castle looks very weak. This invites to play 31... Bxf4, opening lines against the white king:

A) 32.Bxh3 Be3+

A.1) 33.Qf2 Rxf2+ 34.Kg1 Nf3+ 35.Kh1 Rh2#.

A.2) 33.Qf3 Rxf3+ 34.Ke2 Bxd2

A.2.a) 35.Kxd2 Rxh3 36.Re8+ Bg8

A.2.a.i) 37.Nd7 Rd6 38.Rcc8 (38.Nc5 Kh7) 38... Rxd7 39.Rxg8+ Kh7 - + [N].

A.2.a.ii) 37.Na4 Ra6 38.Nc5 (38.Rcc8 Rxa4 is similar to A.2.a.i) 38... Rxa2 - + [N + P], with the double threat 39... Rxb2+ and 39... Nf3+.

A.2.b) 35.Bg2 Nxg2 and White seems to lose more material in all lines (36.Kxf3 Nxe1+; 36.Kxd2 Nxe1).

B) 32.Bxf4 Rxf4+ 33.Kg1 Rxg4 looks crushing.

C) 32.Kg1 Qh2+ followed by 33... Bxd2+ also wins.

Aug-09-12  poszvald: 31, ..Bxf4
32, Bxh3 Be3+
33, Qf2 Rxf2+
34, Kf1 Rxd2+

If Q not taken by bishop

31, ..Bxf4
32, Bxf4 Rxf4+
33, Kg1 Rxg4 and basicly nothing that white can do to lose an other piece.

34, Qe8+ Bg8 and after this Bg7 is lost

Aug-09-12  Abdel Irada: <The discovery channel?>

Black begins to dismantle White's fortifications with the pseudo-sacrifice 31. ...♗xf4!, threatening discovered check with the rook on f8. As it turns out, this threat is worth more than his queen.

White has four plausible replies, listed in order of strength:

(1) 32. ♗xh3, ♗e3 and either

(1.1) 33. ♕f2?, ♖xf2;
34. ♔g1, ♘f3;
35. ♔h1, ♖h2# or

(1.2) 33. ♕f3, ♖xf3;
34. ♔e2, ♗xd2;
35. ♔xd2, ♖xh3 . Black is a piece ahead and should win without much trouble, although White can cause some temporary annoyance with 36. ♖e8; however, the ensuing pin will soon be broken and White has no real counterplay.

(2) 32. ♗xf4, ♖xf4;
33. ♔g1, ♖xg4 . The pin on White's king's bishop will rapidly decide the game, particularly since Black's bishop on h7 watches the c2 square, preventing White from adding a defender.

(3) 32. ♘d7/♘e6, ♗e3!;
33. ♘xf8, ♖f6 and one of

(3.1) 34. ♕f3, ♕xg2# or

(3.2) 34. ♕f2, ♖xf2;
35. ♔g1, ♕xg2#

(4) 32. ♔g1, ♕h2;
33. ♔f1, ♗e3 and one of the following

(4.1) 34. ♕f3, ♕xg2#

(4.2) 34. ♕f2, ♖xf2#

(4.3) 34. ♗f3, ♕g1#.

White can also try 32. ♕f3 or 32. ♕f2, but in either case, Black wins a piece. If there is any other defensive try, I don't see it.

Aug-09-12
Premium Chessgames Member
  gofer: <31 ... Bxf4!>

32 Bxf4 Rxf4+ 33 Kg1 Rxg4!

<32 Bxh3 Be3+>

33 Qf2 Rxf2+ 34 Kg1 Nf3+ 35 Kh1 Rh2#

<33 Qf3 Rxf3+>
<34 Ke2 ...>

Now this is the pivotal move. Black has lots of options; Bxd2, Rxh3 and even Bxd4!

<34 ... Bxd2>
<35 Kxd2 Rxh3>
<36 Re8+ Bg8>
<37 Nd7 ...>

The most important thing is to avoid is a little draw by repetition that is lying around...

1 Nf8

White threatens Ng6+/Nf8+ etc, but this only exists in some combinations and can be avoided by playing

1 ... g5

<38 Nf3+! ...>

Now this is all very good, but far too much for a Thursday.

~~~

White went for "quick death", but "slow and painful death" was available!

Aug-09-12  morfishine: <31...Bxf4> is the move that kills. After <32.Bxh3 Be3+>, I think White improves with <33.Qf3> allowing the White King to escape to the Queen side.

Play could continue <33...Rxf3+ 34.Ke2 Bxd2 35.Kxd2 Rxh3 36.Re8+ Bg8>


click for larger view

For a piece, White has escaped the mating net resulting from <33.Qf2> and managed to 'drum up' a little counterplay

Aug-09-12  gambler: got this one really quickly. Black could already exchange queens for a pawn, but I decided to reverse move orders, because Bxf3 cannot be met with Bxh2.

I did not calculate everything through, but even in the worst case scenario, black could always try to trade of pieces. that's why i picked it and was right on the balls, as it seems.

Aug-09-12  LoveThatJoker: Cool! A GM Kasimdzhanov puzzle!

<31...Bxf4!>

A) 32. Bxf4 Rxf4+ 33. Kg1 Rxg4

B) 32. Bxh3 Be3+ 33. Qf3 (33. Qf2 Rxf2+ ) 33...Rxf3+ 34. Ke2 Bxd2 35. Kxd2 (35. Bg2? Nxg2! 36. Kxf3 Nxe1+ ) 35...Rxh3 36. Re8+ (say) Bg8 37. Nd7 Rd6

C) 32. Nd7/Ne6 Be3+! 33. Nxf8 Rf6+! 34. Qf3 (34. Qf2 Rxf2+ 35. Kg1 Qxg2#) 34...Qxg2#

LTJ

Aug-09-12  PinnedPiece: Thursday goal: Solve in 10 minutes

I found Bxf4 after about 4 minutes, took another minute to see the followup oombinations possible even without the black queen, and committed to that line. The WSB would finish thing off....

Rare that I get a Thursday cleanly.

.

Aug-09-12  YetAnotherAmateur: One defense I haven't seen yet:
31. ... Bxf4
32. Qf2
This seems to stop an immediate win, although it does leave white with a terrible position down several pieces soon enough: 32. ... Qxg2+
33. Qxg2 Bxd2+
and it's only a matter of time before white's rooks are toast. White has a little bit of counterplay with Nd7 to win a rook.

Any obvious responses I'm missing for black?

Aug-09-12  James D Flynn: White is a pawn up but his K is exposed: candidates Bxf4, Nxg2,Bd3. 31..Bxf4 32.Bxh3 Be3+ 33.Qf3(if Qf2 Rxf2+ 34.Kg1 Nf3+ 35.Kh1 Rh2#) Rxf3+ (if Nxf3 34.Bxe3) 34.Ke2 Bxd2 35.Kxd2 Rxh3 36.Re8+ Bg8 37.Nd7 Re6 38.Rc8 Rxe8 39.Rxe8 and Black is a piece up. 31..Nxg2 32.Qxg2 Bd3+ 33.Nxd3 Qxd3+ 34.Qe2 Qxd4 35.f5 Bg3 36. Rd1 Re6 37.Qg2 Qd3+ 38.Kg1 Re2 39.Qc6 Bf2+ 30.Kh1 Qh3# 31..Bd3 32.Bxh3 Bxe2+ 33.Rxe2 Bxf4 34.Rf2 g5 35,Nd7 wins the exchange and White is a Rook up,
Aug-09-12
Premium Chessgames Member
  kevin86: Warm up the camel! An Arabian mate is coming:34 ♔g1 ♘f3+ 35 ♔h1 ♖h2#
Aug-09-12  mworld: I must have gotten lucky, I saw the powerful bxf4 before I even paid any attention to the black queen. If I had explored the queen moves first I probably would have gotten tired before seeing this one. Funny how much deeper one will look if they don't realize the queen is on the line.
Aug-09-12  David2009: C Maier vs Kasimdzhanov, 2011 Black 31?

Try 31...Bxf4! GOOT! seeing 32.Bxh6 Be3+ 33.Qf2 forced Rxf2+ 34.Kg1 forced Nf3+ 35.Kh1 Rh2#. Better is 32.Bxf4 Rxf4+ 33.Kg1 when Black can swap things off on g2 followed by Rxg4+ and Rxd4, or analyse 31...Rxg4 32.Qe8+ Bg8 and the checks run out. Time to check:
====
Yes. However my analysis is seriously flawed: 33.Qf2? is not foced and 33.Qf3! instead avoids mate and allows White to fight on a piece down.

Here's the puzzle position colours reversed:


click for larger view

( C Maier vs Kasimdzhanov 31. ...? colours reversed)
with a link to Crafty End Game Trainer: http://www.chessvideos.tv/endgame-t...

Enjoy polishing off the robot - if you can. One continuation (normal colours): 32...Bxd2 35.Kxd2 Rxh3 36.Re8+ Bg8 37.Kc2 Kh7 38.Kb1 and the win is not trivial.

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