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Sebastian Bogner vs Gillan Bwalya
Chess Olympiad (2010), Khanty-Mansiysk RUS, rd 1, Sep-21
Dutch Defense: Stonewall. Modern Variation (A90)  ·  1-0
To move:
Last move:

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Kibitzer's Corner
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Sep-22-10
Premium Chessgames Member
  whiteshark: Good Monday evening puzzle <43.Bf7+!> with 43... Kxf7 44.Rf6+ Ke8 45. Qxf8#
Nov-02-10
Premium Chessgames Member
  Phony Benoni: First thought was to lure the king away from the queen. Rinse and repeat.
Nov-02-10
Premium Chessgames Member
  dzechiel: White to move (43?). Material even. "Easy."

I don't know why this one took me so long, I found the key move right away, but when calculating the second move, I forgot the bishop was now blocking the black queens's defence. I then started down a bunch of wrong paths, only to be drawn back to my original idea. Even then it took me a while to see the simple checkmate.

OK, let's begin with a forcing move:

43 Bf7+

Black has three legal replies, all king moves:

- 43...Kd8
- 43...Kxf7
- 43...Ke7

43...Kd8

allows

44 Qxf8+ Be8 45 Qxe8#

not good for black.

43...Kxf7

is met with

44 Rf6+ Ke7 (or 44...Ke8) 45 Qxf8#

Just as bad. Lastly

43...Ke7 44 Qf6#

Is was this last line that I kept overlooking initially, only to force myself to see it by walking through all of white's legal moves after 43...Ke7.

That's it, time to check.

Nov-02-10  LIFE Master AJ: 43.Bf7!+

If Black takes, White wins the Queen with Rf6+. If 43...Ke7; then 44.Qf6#.

Nov-02-10  LIFE Master AJ: http://ratings.fide.com/card.phtml?...
Nov-02-10
Premium Chessgames Member
  White Star: took me a minute or three to find 43) Bf7+ and another minute to overcome "chess blindness" to realise that Qf6 is now possible: neat
Nov-02-10  stacase: Looks like Bishop sacrifice week. Took me too long to see it.
Nov-02-10  Formula7: 43.Bf7+ and now;

A) 43...Ke7 44..Qf6#

B) 43...Kd8 44.Qxf8+ Be8 45.Qxe8#

C) 43...Kxf7 44.Rf6+ Ke7/Ke8 45.Qxf8#

Time to check.

Nov-02-10  Nullifidian: Found this in about ten seconds.

43. ♗f7+ wins the game.

Black can take the bishop, in which case it's mate in two more moves:

43... ♔xf7 44. ♖f6+ ♔e8/e7 ♕xf8#

Black can retreat to d8, which is mate in two more moves as well:

44... ♔d8 45. ♕xf8+ ♗e8▢ 46. ♕xe8#

Or a mate in one more move:

44... ♔e7 45. ♕f6#

Nov-02-10  Stormbringer: Old story - missed the Monday, got the Tuesday. :-/
Nov-02-10
Premium Chessgames Member
  al wazir: Why didn't white play 40. Qa8+, and after 40...Qf8, 41. Bf7+ ?

Because he didn't see it!

Nov-02-10  Whitehat1963: What a terrible week! Pathetic!
Nov-02-10  VincentL: "Easy".

The first thing I see here is that 43. Bf7+ Kxf7 44. Rf6+ wins the black queen and mates. 44.....Ke7/Ke8 45. Qxf8 mate.

If black declines the bishop, the end is also swift.

43..... Ke7 44. Qf6 mate
43.....Kd8 44. Qxf8+ Be8 45. Qxe8 mate.

Letīs check.

Nov-02-10  M.Hassan: "Easy" White to play 43.? Materials are even
43.Bf7+ Kf7
44.Rf6+ and picks up Black Queen in next move

Black King can choose not to take the Bishop after check: 43.Bf7+ Ke8
44.Qe5+ <if Kxf7 Black Queen will be lost> 44............Kd8
45.Qf6#
1-0

Nov-02-10  mohannagappan: 43.Bf7+ Kxf7 44.Rf6+ Kxf6 45.Qxf8 capturing black queen
Nov-02-10
Premium Chessgames Member
  Once: I think the time has come to dim the lights, put some Barry White on the CD player, go upstairs to slip into something uncomfortable, put a tea towel over the gerbil's cage, and ... let's talk about lurve.

Or more precisely, let's talk about how we choose that special one, the wife, the husband, the civil partner, the one I want to grow old with.

Now you might think that this is an easy thing to do. It certainly seems to be in Hollywood. As soon as the special one walks into the scene, you just know that you are fated to be together forever. Birds tweet, heavenly choirs sing, little cherubic children frolic and gamble. Okay, so you might be in the middle of a car chase or a gunfight with the henchmen of Dr Evil at the time, but the rules are clear - you know when the Special One appears.

Summer lovin' had me a blast
Summer lovin' happened so fast
I met a girl crazy for me
Met a boy cute as can be
Summer days driftin' away,
to uh-oh those summer nights

But in real life, it's not so easy. There are 6.8 billion examples of homo sapiens on this planet. Take away the ones that are too young, too old and of the gender you are not interested in, and you've still got ... well over a million to choose from. And of these you are going to meet, say a few dozen, maybe a hundred before you make your choice.

And there's another thing. You need to know if your prospective partner has ... issues. She may scrub up well and be enthusiastic in the bedroom, but all of this counts for nought if she's a closet axe murderer. A good cook is one thing, a bunny boiler is entirely another.

My friends, a word of advice from one who has got it wrong in the past. You've just go to check these things before you sign on the dotted line. Read the small print. Show your beloved a selection of sharp garden implements and see if her eyes light up when you get to the woodcutting section. Check out whether she puts woodland creatures into a hutch or into the pot.

I speak as one who married an ice queen, then followed it up with a bunny boiler before finding the paragon of wonderfulness that is the Mem.

And it's the same with chess. Every move we play is a decision, a choice between competing options. And we need to be sure that we are making a good choice.

In today's position, we have a fairly obvious plan and an equally clear danger. Our plan, surely, is to lure the black king away from the defence of the Qf8. The danger we need to avoid is that black mates us with a bishop check on the long diagonal. Or snaffles our en prise rook. Or both.

So we need a check and 43. Bf7 catches our eye. From across a crowded room, our eyes meet. A crackle of electricity as our fingers touch. Insert other romantic clichees to taste.

Now we need to check Bf7+ for axe-murderer tendencies. Is there a flaw in our thinking? Can black wriggle out of the tactic with advantage? And for that you have to do the hard graft and check out every variation. After all, with Bf7 we have left our rook with no protection and offered the possibility of Bxc6#. Ouch, very ouch, baby.

And for those variations, may I refer you to m'learned colleagues?

I got chills
They're multiplyin'
And I'm losing control
Cause the power you're supplying
It's electrifyin'...

Nov-02-10  gofer: 43 Bf7+ ...

43 ... Kxf7 44 Rf6+ Ke8/Ke7 45 Qxe8#
43 ... Ke7 44 Qf6#
43 ... Kd8 44 Qxf8+ Be8 45 Qxe8#

That's gotta hurt...

Nov-02-10
Premium Chessgames Member
  patzer2: White's 43. Bf7+! combines the decoy and deflection tactics to force a quick mate.

For the uninitiated, especially non-players, it's hard for them to realize the thrill a tournament player gets in finding a winning combination to take what appears to be a well defended position and destroy it with a deliberate material sacrifice.

It's nothing like making love to your significant other, but as <Once>'s analogy indicates finding a winning combination in a tight contest can be a highly satisfying feeling.

P.S.: For the uninitiated, the song "You're the One that I Want" from the 1978 movie Grease, with John Travolta and Olivia Newton John, can be viewed at http://www.youtube.com/watch?v=gyUW....

Nov-02-10
Premium Chessgames Member
  agb2002: The material is even.

Black threatens 43... Qxh8, 43... Bxc6 and, if White becomes excessively relaxed, his king may experience difficulties.

The white pieces surround the black king and the most effective way to resume the attack seems to be 43.Bf7+ Kxf7 (43... Ke7 44.Qf6#; 43... Kd8 44.Qxf8+ Be8 45.Qxe8#) 44.Rf6+ Ke7(8) 45.Qxf8#.

Nov-02-10  zb2cr: 43. Bf7+ works, because the Black Queen is pinned. I have nothing to add to the comments by <whiteshark>, <dzechiel>, <Formula7>, <Nullfidian>, <VincentL>, <gofer>, and <agb2002>.
Nov-02-10  Morten: I had a bit of trouble finding this. Like a few others, I missed the mate in one after 43.-, Ke7.

But before that I also spend too long looking at rook checks on c8 and e6 to break the black cage down.

At least for me, I think Bf7+ would have been easier to find if there had been a black pawn on that square.

Nov-02-10  iamsheaf: Remarkable mate in 3 puzzle. Unbelievable, in a completely normal looking position, white forces a mate.
Nov-02-10  euripides: worth noticing the off-piste <43.Bf7+ Kf7 44.Rf6+ Ke7> 45.Rxf8 Bc6 mate.
Nov-02-10  Patriot: 43.Bf7+ and white wins in all lines. Nice problem!

I was wondering where black really started to degrade so I back-tracked and black seemed to be in terrible trouble at least since move 33. After 33...Rh4? 34.e6! (threatening 35.Rd8+ Kg7 36.Rd7 ) 34...Bxe6 35.Qd4+ Kg8 36.Qe5 and it's all downhill for black.

If black tried 33...Rxd6 34.exd6 Qe3+ 35.Kh1 Bd6. Or 34.Qxd6 Qxd6 35.exd6 Bd6 (not 35...c6 36.Bc6 or 35...gxf4 36.Bxc6 and 37.d7 ) 36.fxg5 looks losing for black. In this case, white has a kingside majority and a simple plan of putting the king on g3; play Bh3; and d7. Black has a majority on the queenside but I think white's pawns are faster.

So perhaps black was lost before move 33. I don't have an engine available. Does anyone have any ideas?

Nov-02-10  JG27Pyth: Found it but have to rate it a fail anyway because I was completely oblivious to Black's mate-in-one threat and had the combination worked to win the Queen rather than force mate I'd be up a queen and down a mate. (A phrase somehow congruous with Once's marvelous post.)
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Featured in the Following Game Collections [what is this?]
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43.? (November 2, 2010)
from Tuesday Puzzles, 2004-2010 by Phony Benoni
43. Bf7+! combines decoy & deflection for a quick mate
from Mating Attack by patzer2


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