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Robert Wilms vs Henning Fraas
10th IHEM (2007), Hamburg GER, rd 2
Caro-Kann Defense: Advance Variation (B12)  ·  0-1
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Dec-08-10  mrsaturdaypants: Alas, not even a Viking on Wednesday this week...

(Always check reversed move orders. Always check reversed move orders.)

Dec-08-10  redorc19: nice puzzle
Dec-08-10
Premium Chessgames Member
  Domdaniel: The pattern/priyom with 1...Qf1+ 2.Rg1 Qxh3# must play *some* role, but perhaps not on the first move, when White can escape. And meanwhile mate is threatened on g7. So maybe 43...Bg3, taking care of both ...? Having satisfied ourselves that 44.Rxg3 loses to ...Qf1+.

For a moment I thought that white might have a 'neutral move' and a line where black has to settle for being a piece up - but in fact there's no defence. 43...Bg3 wins.

I wonder if I'd have seen it so quickly *without* the mate threat on g7 ... ?

Dec-08-10
Premium Chessgames Member
  kevin86: Very Coy for black-he gives a fine gift of a bishop---instead it is the final piece of a mating net prepared for the white king. Queen and rook soon mate...
Dec-08-10  SloVice: I don't normally post on the daily puzzle, but I'm especially proud of myself as I was unusually sharp today. First I would like to take this opportunity to thank <dzechiel> for your daily analysis. Like many, I read your posts daily and compare my analysis to yours. Keep up the good work!

Candidate moves I considered (in no particular order): Qf1+ Rxa2 Ra7 Bg3 Qe5 e5

Yes, some of those are embarrassing, but thankfully they were quickly dismissed, especially after realizing that black was staring at 44. Qxg7#

I kept trying to make 43...Qxf1+ work but after 44.Kh2 Bg3+ (not 44.Rg1? Qxh3#) 45.Kxg3 black seemed to have nothing left.

I tried 43...Qe5 to stop the mate threat, but I even saw 44.Qg6+ Kh8 (or Kg8) 45.Qe8+ Kh7 46. Qg6+ etc for the perpetual. Not bad for being down a piece and a pawn.

Finally, I gave Bg3 a second look. Anything other than 44.Rxg3 allows 44...Qf1+ 45.Rg1 and mate at h3. So, 44.Rxg3 Qf1+ 45.Kh2 (again, not Rg1) Rxa2+ and now the king cannot escape via g3 and it is mate next move. I prefer Qxg2# rather than Rxg2#. It was a good day Tater.

Dec-08-10  Patriot: <Domdaniel> <...but in fact there's no defence. 43...Bg3 wins. I wonder if I'd have seen it so quickly *without* the mate threat on g7 ... ?>

This is an excellent point. It's sort of a clue because any candidate black chooses must stop the mate threat in some way and 43...Bg3 does just that and more. I didn't see it quickly so I had to use deductive logic to find the move. The fact that it stops mate was an indication that I was on the right track.

Dec-08-10  David2009: R Wilms vs H Fraas, 2007 Black 43...?

Black has White on the ropes: how to finish him off? 43...Bg3 stops both 44 Qg7# and 44 Qg6+, meanwhile threatens 44...Qf1+ 45 Rg1 Qxh6# White is curiously helpless against this threat, because 44 Rxg3 Qf1+ 45 Kh2 Rxa2+ forces mate. Time to check:
====
Exactly.

Dec-08-10
Premium Chessgames Member
  agb2002: Black is a bishop and a pawn ahead.

White threatens 44.Qxg7#.

The mate threat suggests 43... Qf1+ 44.Kh2 (44.Rg1 Qxh3#) Bg3+ 45.Kxg3 (45.Rxg3 Rxa2+ 46.Rg2 Qxg2#) Qe1+ 46.Kh2 Qe5+ and 47... Qf6 and White's attack vanishes. However, Black can improve his expectancies with a simple change in the move order, that is to say, 43... Bg3 instead of 43... Qf1+:

A) 44.Rxg3 Qf1+ 45.Kh2 (45.Rg1 Qxh3#) Rxa2+ 46.Rg2 Qxg2#.

B) 44.Rg1 Qe2
B.1) 45.Rxg3 Qf1+ transposes to A.
B.2) 45.Rg2 Qf1+ 46.Rg1 Qxh3#.

C) 44.Kg1 Qb1#.

Dec-08-10  Autoreparaturwerkbau: <ruzon> That was a great story!
Dec-08-10  ProLogik: I'm surprised the Caro-Kann Defense could result in such a dynamic game.
Dec-08-10
Premium Chessgames Member
  Once: <gofer: Today there was no "best" defense. We have mate in 3 more after the initial move against any defense... ...so not facinating at all>

I guess it all depends in what you are looking for in a puzzle. If all that interests you is the depth of the variations then sure it's just a little forced mate in three. Boring, dull, I'm a real man so give me a Sunday insane and a plate of raw meat.

But if you notice that several of the early posters struggled with this one, and the mighty <dzechiel> nearly went down the wrong path, then a student of human nature might stop to wonder why...

Add in the fact that some folk seemed to find it all so incredibly easy and couldn't understand what all the fuss was about... And isn't it odd that the first kibitzers to post were the ones that seemed to struggle most, but the later ones mostly got it exactly right? Perhaps there is something about living in a different time zone that affects your ability to play chess well? ;-)

Doesn't that make you just a little curious? How can a puzzle be both simple and difficult? Why do some people admit to missing it and others crow about it being blindingly obvious?

And when you do solve the puzzle, doesn't it strike you as interesting that the key move came about as a response to a black defence rather than as an aggressive move in its own right (which is the more normal type of Wednesday move).

Ands then take a look at the thoughtful and incisive posts from <patriot>, <domdaniel> and others...

I suppose when we stop being curious about the world around us, we stop learning, savouring, enjoying.

Many years ago I was reading English literature at University. And one of the students said something like this: "I don't see what all the fuss is about Hamlet. It's just a bloke wibbling on about his dead dad."

To which one of the lecturers replied: "If that's all you can see, then I understand why you don't know what all the fuss is about."

Dec-08-10  Bignevermo: after so many bonehead attempts..to solve these puzzles... a true win...very much a victory for me.... :).... i know it was an "easy" peasy puzzle... but for me... a good win...that didnt involve a queen sac!! :)
Dec-08-10  Bignevermo: also i thought black was in trouble when at 34...rf4...i thought he was in trouble.... like i usually get into when i move a rook onto the mid-files.... but not this game!
Dec-08-10  standardwisdom: OK, so maybe I was complacent, but my thought process was:

43. ♕f1+
44. ♔h2 ♖a2
45. ♖xa2 ♗f2!

Now black is threatening mate at g1 and h3).

46. ♖xf2 ♕xf2+
47. ♔h1 ♕e3.

Now, black will win with extra pawn majority easily - there is nothing stopping the d pawn, and white can't even give a check.

Perhaps not as fabulous as Bg3!, but it seems that this gets you a win. And if you believe a win is a win is a win, then..

Dec-08-10  tacticalmonster: 1) White threatens mate in one

2) Black is up a bishop but it is poorly placed

3) Black needs to line up his major pieces to target the weakened White's kingside. The queen should go to e2 or f1 and the rook likes to seize the seventh rank with Rxa2.

Candidate: 43 Bg3

a) 44 Rxg3 Qf1+ 45 Rg1 Qxh3#

b) 44 Rxg3 Qf1+ 45 Kh2 Rxa2+ 46 Rg2 Qxg2#

c) 44 Rg1 Qe2 45 Rg2 Qf1+ 46 Rg1 Qxh3#

Dec-08-10  Patriot: <<standardwisdom>: OK, so maybe I was complacent, but my thought process was: 43. Qf1+
44. Kh2 Ra2
45. Rxa2 Bf2!

Now black is threatening mate at g1 and h3).>

How about 45.Qxg7#?

Dec-08-10  SuperPatzer77: <gmalino>: I completely agree with your commentary. In my opinion, 43...Bg3! (Of course, it solves all of Black's problems) sure as heck leads to the quick mate. Its tactics is interference - 43...Bg3!

Hennning Fraas (Black) kills two birds with one stone by stopping Qxg7# and setting up the mating net.

SuperPatzer77

Dec-08-10  zabbura2002: The hero was the pawn on e6 that prevented White from checking.
Dec-08-10  wals: I did think 43...Bg3 but didn't pursue it. What a dumbbell.

Rybka 4 x 64

depth: 19 : 4 min :
White error
(-1.46):34.Kh1. Best, Rg4, -0.90.

depth: 22 : 3 min :
Black blunder
(=0.00):34...Rf4. Best, Rc6, -1.46.

depth: 20 : 4 min :
White blunder
(-2.69):35.Qb5. Best, Nxd5, =0.00.

depth: 20 : 4 min :
White blunder
(-7.19):36.Qe8+. Best, Rf3, -2.69.

depth: 15 : 3 min :
White error
(-8.87):40.Nb5. Best, Qb5, -7.17.

depth: 19 : 4 min :
Black error
(-7.32):40...Qxe5. Best, Bd2, -8.87.

depth: 18 : 7 min :
White blunder
(-#16);41.Qxf7. Best, Qc8, -7.32.

depth: 20 : 3 min :
Black blunder
(-4.76):41...d4. Best, Rc6, -#16.

depth: 19 : 4 min :
White blunder
(-13.80):42.Kh1. Best, Nxd4, -4.76.

depth: 15 : 4 min :
White blunder
(-#12):43.Rg2. Best, Kh2, -15.29.

and the end of White's run.

Dec-08-10  CanITakeThatBack: <Gofer>Now, I will have to do some real work, with nothing more stimulating to occupy my time!

dont get any lotion on the keyboard Mclovin...

by the way your sooooo cool.

Dec-08-10  rusticbull: got it . . . with ease this time
Dec-08-10
Premium Chessgames Member
  gofer: <Once> ... English literature ... well that really explains a lot.

:-)

I dabbled in a multitude of sins and learnt that I wasn't the sharpest tool in the box, but then I swapped the library for a DEC Alpha and never looked back...

...one thing I did learn whilst at uni was "Gestalt Switch". One's ability to only be able to see one picture, whilst others only see a completely different one and this is far more likely to explain the differences in today posts than time zones...

http://www.google.com/imgres?imgurl...

I can only see the beautiful girl and have to squint to see the old hag, but that's enough said about my hang ups...

Dec-08-10  RandomVisitor: 43...Qf1+ 44.Kh2 Bg3 45.Kxg3 Qe1+ 46.Kh2 Qe5+:


click for larger view

Rybka4

[-2.00] d=25 47.Kg1 Qf6 48.Qb7 Ra3 49.Qe4+ Kg8 50.Rb2 Qf5 51.Qxd4 Rxf3 52.Rg2 e5 53.Qg4 Qxg4 54.hxg4 Ra3 55.g5 Kf7 56.gxh6 gxh6 57.Re2 Kf6 58.Rf2+ Kg5 59.Rg2+ Kf5 60.Rf2+ Ke4 61.Re2+ Kf4 62.Rf2+

Dec-08-10  TheBish: R Wilms vs H Fraas, 2007

Black to play (43...?) "Medium/Easy"

Running out of time, but I finally see that 43...Bg3! is the winning move (after looking at sacking the queen after 43...Qf1+ 44. Kh2 Qxg2+ which probably loses).

43...Bg3! (blocking the mate) 44. Rxg3 Qf1+ 45. Kh2 (or 45. Rf1 Qxh3#) Rxa2+ and mate next.

Dec-09-10  standardwisdom: <Patriot: How about 45.Qxg7#?>

Absolutely, I missed that one. Thought about it a few minutes ago, came to check here, and realized my gaffe hadn't evaded your careful eyes. :-)

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