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Fidel Corrales Jimenez vs Thal Abergel
XXXII Tenkes Cup (2008), Harkany HUN, rd 6
Slav Defense: Chameleon Variation (D15)  ·  1-0



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Given 2 times; par: 116 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Feb-12-11  WhiteRook48: aah i failed
Feb-12-11  alachabre: With help from Ruffian, it appears Bc2 is playable, but apparently Bd3 is a terrible blunder. Ah well, that's why we study!
Feb-12-11  alachabre: To wit:

46. Bc2 f3 47. Bd3 b4 48. Kxh5 a4 49. Kg5 b3 50. axb3 a3

Feb-12-11  alachabre: And 46. Bc2 turns out to be a draw. Rats.
Feb-12-11  wals: Saw 46.Bd1, but that was about it.
What a neat mating net.

Rybka 4 x 64
Black blunder
d 26 : 6 min :
41...Ke6, +7.04. Best,

1. = (0.19): 41...Kg7 42.Be2 f6 43.Ke4 Kh6 44.Bf1 Kg7 45.Kd5 g5 46.Kc5 f5 47.hxg5 Kg6 48.Kb6 h4 49.Kxa6 Kxg5 50.Kxb5[] Kg4 51.a4 f4 52.Be2+ Kg3 53.a5 h3 54.a6 h2 55.Bf3 Kxf3 56.a7

Feb-12-11  smitha1: Congratulations <Once>! May your marriage get even better each year.

In my experience (25 years of marriage, 43 years of chess), marriage is like chess: the trick is learning the right lesson in good times and bad. For me, I have been discouraged this week due to some spectacular board blindness. The obvious lesson would have been to give up chess and take up darts, but tonight I easily got the puzzle right up to just before Qc3+, certain that something would pop out of the woodwork at that point.

So keep going, be positive and the very sweet rewards will come.

Feb-12-11  BOSTER: This is the position after 30...Rd6 with white to play. If this position is correct, what is wrong with 31.Bxf7+?

click for larger view

I don't think black can draw here.
And this is the position after 37.Kf2, where black played Kf8.

click for larger view

I guess playing 37...Kg7 and then f6-g5 black at least can draw.

Premium Chessgames Member
  Phony Benoni: <BOSTER> If <31.Bxf7+ Kxf7 32.Rxd6>:

click for larger view

I think Black has a draw starting with <32...Qh3+>. If the White king moves to the e-file, the Black queen checks on g3 or h2, and the White king can't move to the d-file without losing the rook.

The only other way of escape is <33.Kf2 Qh2+ 34.Kf3>, but the draw is even simpler: <34...Qh3+ 35.Ke4 Qf5+ 36.Kd4 Qc5+>, and White must repeat moves with 36.Ke4.

If White were to be stubborn and play on, Black may win the ♔+♙ ending by trading queens and playing ...g5, as he will have the outside passed pawn.

Feb-12-11  alachabre: <TuxedoKnight> I would like to offer some constructive criticism. If you don't want it, please don't read further. First, your post is technically spam. Second, I would rethink the purple-on-purple chessboard. Third, that puzzle rated 4.5 of 5 is actually quite easy, with no detailed analysis needed - all moves are forcing to stalemate. This is, of course, just my opinion.
Feb-12-11  stst: Not much to analyze, whether 48. Kg5 or Kg4 doesn't make a difference.

49. Bxf3 is a good choice, as it's a check and Black must take the Bishop, allowing White to queen even faster.

All in all, Black is simply one pace behind White to queen.

3 star is over-rated.

Feb-12-11  pmukerji: Interesting stuff. Got the first set of moves but had thought it through as completely as the final solution.

On a slightly different note, at move #31 shouldn't white play Bxf7+ and trade the bishop for the rook? or am I missing something. 'cause if this is legit then white has essentially won at this stage, right?

Premium Chessgames Member
  Phony Benoni: <pmukerji> That was covered several posts ago. Black has a perpetual check after 31.Bxf7+ Kxf7 32.Rxd6 Qh3+:

click for larger view

Feb-12-11  BOSTER: <Phony Benoni> How about this:32...Qh3+ 33.Kf2 Qh2+ 34.Kf3 Qh3+ 35.Kf4! if Qf5+ 36.Kg3
Feb-12-11  pmukerji: Looks like <Boster> and <Phony Benoni> have explored this and I think I understand <Phony Benoni>'s thinking. However what if white plays:

31 Bxf7 Kxf7
32 Rxd6 Qh3+
33 Ke2 Qh2+
34 Ke3 Qh3+
35 Kf4

At this point I think black can either play Qxh4+ or Qf5+. If Qxh4+ then white move his queen closer to the rook to protext it and move to the other side. If Qf5+ then white move to the g file to allow its queen to intervene at the appropriate point. This looks like a viable option, no?

Feb-12-11  pmukerji: Looks like Boster and I were thinking along the same lines :-)
Feb-12-11  pmukerji: I meant "white moves his KING closer to the rook to protect it"...sorry.
Feb-12-11  pmukerji: I see it...doesn't work, black just moves between c5 and f5 for the perpetual...some of us are just slower :-).
Premium Chessgames Member
  Phony Benoni: <BOSTER> <pmukerji> I don't think <30.Bxf7+ Kxf7 31.Rxd6 Qh3+ 33.Kf2 Qh2+ 34.Kf3 Qh3+ 35.Kf4> avoids the draw:

click for larger view

Now 35...Qf5+ 36.Kg3 wins for White, but <35...Qxh4+> should do the trick. If 36.Kf3 Qh3+ we're just repeating, and after <36.Ke5 Qg5+> we've seen the lines 37.Kd4 Qc5+ or 37.Ke4 Qf5+ 38.Kd4 Qc5+ before.

But I really should have noted this earlier. Thanks for catching it.

Feb-12-11  VincentL: "Very Difficult".

I will be one of the last posters here.

White effectively has a bishop for a pawn.

But how to win with that?

The first question is: which of white´s pawns is going to promote? Surely it has to be the KRP.

The most obvious first move is 46. Bd1. I hesitate with this, as it does not seem to me to be a "puzzle move".

With the B on the d1 - h5 diagonal, white can pick off black´s f pawn if it advances to f3, and also take black´s h pawn, enabling his own h pawn forward.

Black´s best chance is to force white to trade the B for the f pawn (Ke4 and f3 will accomplish that) and then advance the Q side pawns.

Effectively we have a pawn race here.

Let´s look at an example line to see how this goes.

46. Bd1 Ke4 47. Kxh5 f3 48. Bxf3 Kxf3 49. Kg5. Now, white needs four moves for his h pawn to reach h8; also when it queens there, the new queen will protect a1m but not b1.

Black has to move both his a and b pawns (obviously the king will not be used). Quickest is a4, b4 and b3. It will not help white to move his a pawn to any square, since this will lose a tempi. Now. best for black is b2, b1=Q. (not bxa2, a1=Q), since white´s new queen will not protect the b1 square.

This process takes two moves, so a total of 5 in all for black.

Now... black effectively "moves first" in this sequence. So there is a problem.

White will play h8=Q (not check) and black´s next move will be b1=Q.

Now we see why this is a Saturday puzzle.

OK - so what trick can we conjure to circumvent this problem?

The answer may be to "make black´s f pawn move further". It could well be captured by white´s B on f1, and not f3.

In this case, white´s first move must be 46. Kxh5. Now what happens?

Black can then try 3 strategies. (a) Move his K back and try to stop white´s h pawn from queening. (b) Move the f pawn forward; force white to trade the B for it, and then push the Q side pawns. (c) Push the Q side pawns first.

Let´s examine each of these.

(a) Black would play 46......Kf6. Then 47. Kh6 and now black cannot play Kf7 (due to white´s B on B3), so white follows with 48. Kg7 and then h5, h6, h7 h8=Q.

So this loses simply.

(b) 46.....f3 47. Bd1. Now black has a choice.He can play (i) 47....f2, and then 48. Be2 b4,

Now white needs 5 moves to promote the h pawn, and black requires 5 also. But this is of no use to white, since black´s b pawn can promote, and white´s new queen on h8 will not protect b1.

I am not finding the trick, and am going to have to check.

Feb-12-11  VincentL: Uh !

Qc3+ and Bg2 mate. I didn't consider this at all.

What´s the song? "Keep right on to the end of the road".

Feb-12-11  M.Hassan: "Very Difficult" White to play 46.?
I thought the only move that would put White in an advantage would be 46.Bd1 which enables White control of f3 square (and possibly f1) and d1a4 diagonal. The game may continue thus:

46.Bd1 Ke4
47.Kxh5 f3
48.Kg5 b4
49.h5 f2
50.Be2 Ke3
51.Bf1 Kd2
52.h6 Ke1
By this move, White deprives Black from promotion whereas he can promote h pawn easily and wins. Time to check

Feb-12-11  Owerbart: the knight sac seemed pretty impresive to me, too bad black lost.
Feb-13-11  brettls: Someone help me please.

I thought 46 a4 looked good and guaranteed a win to white. I understand that this is not the solution provided for the puzzle, but would like to have somebody explain to me why it's not sound. Cheers.

Feb-13-11  rilkefan: <brettis>, check out page one of the kibitzing - look for my handle.
Premium Chessgames Member
  Phony Benoni: <brettis> After <46.a4>:

click for larger view

Black wins, as he will be able to promote one of his two passed pawns before White can promote; the bishop can't stop them both. For example, 46...bxa4 47.Bxa4 f3 48.Kxh5 f2 49.Bb5 a4!.

47.Bc4 would make no difference. And, for that matter, 46...b4 wins as well.

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