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Loek van Wely vs Peter Acs
"The Acs Falls" (game of the day Jul-12-2016)
Essent Crown (2002), Hoogeveen NED, rd 6, Oct-19
Nimzo-Indian Defense: Normal Variation. Bishop Attack Classical Defense (E48)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Given 5 times; par: 16 [what's this?]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 5 ·  Later Kibitzing>
Apr-22-12
Premium Chessgames Member
  Jimfromprovidence: I think that 16...Bf5+ is the move of the match.

That's why after the text 17 Kg1 Qh2+ 18 Kf1 Bg3 that 19 Qd2, below, is no good.


click for larger view

Now it's 19...Bxd3+ with mate next move.

I wish I had seen it. I thought that 16...Bxe6+ was necessary first, so white's knights could not get to f4. But that move loses one crucial tempo and white can now play Qd2 safely.

Apr-22-12
Premium Chessgames Member
  Infohunter: <Autoreparaturwerkbau: I find some other kibitzer's puns also very amusing: - sharp tact <acs> - and my <acs>
- An amazing <acs>ersize

:)

Especially if you know Peter Acs 's surname is spelled as <┴ch> (<ch> as in mu<ch>). <┴cs> means carpenter on Hungarian.

Oh, btw: would anyone care to explain a pun? I see a distinct possibility someone who has never even heard of Hungarian language could read it as <axe>, since <sharp axe> would have some meaning then. Is that it?

Anyway... "sharp ach" :)) I have to spread that one out.>

You are correct in surmising that the pun was made by an English speaker who, seeing the name of ┴cs, assumed it was to be pronounced as "axe" and not "atch" (just making clear which "ch" pronunciation I mean), as it actually is in Hungarian. My eye rebounded from that pun too, but only for an instant until I realized the truth of the matter.

Incidentally--18...Bg3--WHAT a move!!

Apr-22-12
Premium Chessgames Member
  al wazir: I guess I'll never be a GM.

I love the move 16...Bf5+! Why didn't Acs play 16...Bxe6+ instead? Because after 17. Kg1 Qh2+ 18. Kf1 Bg3, white has 19. Bxh7+. Yes, black still wins by playing 19...Kf8/Kh8 (19...Kxh7 20. Qc2+, and white can hold out), but the text move wins immediately.

This just *had* to be a prepared variation.

Apr-22-12  sevenseaman: Black is a R and a N off.

First thoughts: It looks like a CT puzzle where a side lacking big material is obliged to get a mate. (I can easily win the Q, it seems)

16...Bg4+ is a temptation I have to <resist>. It springs from the fear of not being able to enforce mate and so keep the insurance of taking the Q instead.

Being a R and a N behind is a strong hint. I see so many puzzles in CT when one with lesser pieces <needs to find mate>. Winning an odd piece does not balance out.

I stated the parameters so others note & I too do not forget them.

A discovered check is a 'discovered check', a very close relative of a double check(discovery is always part of that, IMO) when the K must move.

Nothing being insertable that situation prevails here. The K <has to move> no matter where I put my B. So its a <vital> decision.

Hmm...16...Bg4+ is not good enough, finally.

<16...Bf5+> alone retains the option of attacking the escaping K from the other side.

<16...Bf4+
17. Kg1▢ Qh2+
18. Kf1▢ Bg3>

I spent 10-15 minutes at this one move. IMO its a bombshell. It countenances no subterfuge. Do nothing, Qxf2 mates. Take it, Bh3 mates.

So what is the defense?

The Q (or R) to e2 is arsenic as it takes away the escape square. Bh3 still mates.

Qd2 or Qc2 have some hope? Let us see.

<19. Qd2 (or Qc2) Bxd3+> and game over(forethought pays off now). The Q alone can remove this check and it must leave the defense of f2.

I totally agree with the 'Insane' tab.

A beauty! After a long,long time I had to work this hard.

Who <is> Peter Acs? Acs= All Chess Sense?

Apr-22-12
Premium Chessgames Member
  FSR: I saw this game before, probably when it was GOTD back in 2008. I remember that it had a very surprising winning motif. I'm thinking that it involved the surprising 16...Bf5+!! But how? Ah, now I see it:

16...Bf5+!! 17.Kg1 (or 17.Kg2) Qh2+ 18.Kf1 Bg3!! Shockingly, White is helpless - 19.Qd2 (or 19.Qc2) Bxd3+ and mate next; 19.Re2 (or 19.Qe2) Qh1#; 19.Ke2 Qxf2#; 19.fxg3 Bh3#.

I think this gives me 7/7 for the week, although yesterday was a gift and today also a gift of sorts. But I'll take it.

Apr-22-12  wenx: Is Bf1+ Kg1 Be2 possible??
Apr-22-12
Premium Chessgames Member
  FSR: Hmm, I see that I kibitzed on this game just four months ago, and suggested that it would make a good Sunday puzzle. I guess the powers that be agreed.
Apr-22-12
Premium Chessgames Member
  FSR: <wenx: Is Bf1+ Kg1 Be2 possible??>

Cool idea, but much weaker than what Acs played - 16..Bf1+ 17.Kg1 Be2 18.Nef4! Bxd1 19.Rxd1 g5 20.e4 gxf4 21.e5 c6 22.Nxf4 and the game goes on.

Apr-22-12  vardeep: 16.well ..Qxf2 also seems quite obvious as whatever be white's next move...it'll be mate in one as there are no escape squares for white's king...
Apr-22-12
Premium Chessgames Member
  FSR: <vardeep: 16.well ..Qxf2 also seems quite obvious as whatever be white's next move...it'll be mate in one as there are no escape squares for white's king...>

Looks good, but as <dezechiel> pointed out earlier, 17.Nef4! stops the mates. Reminds me a little of Marshall vs Dus Chotimirsky, 1911. After 12...Qg3, Dus Chotimirsky excitedly announced, "Poor Marshall dead! Must be mate!" After Marshall played 13.Qxg4, Dus Chotimirsky said, "I am dead!" and resigned.

Apr-22-12  Abdel Irada: After realizing that the tempting "anti-thematic" solution 1. ...♕xf2 fails to ♘f4 (either ♘), I was brought back to the thematic discovery options.

I first had to eliminate 1. ...♗xe6+; this occurred after it became apparent that it allowed white to create an escape square on d3 with a timely ♗xh7+, and the same applies to ...♗g4.

This leaves only one discovery that rules out this defense: 1. ...♗f5+; 2. ♔g1, ♕h2+; 3. ♔f1, ♗g3!. Now taking the bishop with 4. fxg3 fails immediately against 4. ...♗h3#. If 4. ♖e2, ♕h1#. And if 4. ♕c2 (or ♕d2), ♗xd3+ with mate to follow.

White has a spite check with ♘f6+ that can be interpolated to delay the above by one move, but the final result is the same.

Apr-22-12
Premium Chessgames Member
  chrisowen: I don't weaken g4 n strode car path h2 a deep heat for mover e1 nf3+ see

har on it down parade escry brace too sac feast for black queen and

bishoph3 re6 all staff bf5+ move boot 17.kg1 qh2+ 18.kf1 us bg3 extra

tetra for tool up 3rd rank awaken black shone out shut net around

monarch pack fudge queend2, open shut 19...bxd3+ 20.qxd3 qxf2# debatable

bad ace too swallow old 9.a3 suppose Wely chalked up one on the dark

days. More good headway for Peter classy yeah blurry enact glory only

god knows how he managed to see the whole sect a ok jocular shaved as

black nqbr faffed 16...bf5+ mutual took a maul 18...bg3 had no cold

among back other thought.

Apr-22-12  IMRKs: 16. Qxf2 and black loses all mating threats after Nef4 and resigns soon
Apr-22-12
Premium Chessgames Member
  profK: So elegant...losts of players could stray from the win...
Apr-22-12  Prosperus: 16. ... Bf1+!? 17. Kg1 Be2! but 18. Nef4 and White have 2R+2B+2N for Q+R+B+N.
Apr-22-12  gofer: This took about 5 minutes to find, so I am a little puzzled that this is a Sunday level POTD. After yesterday's simple POTD, I thought today we would get a real stinker! But after completing my rant I realise that the moves after white gives up his queen are Sunday level.

<16 ... Bf1+>
<17 Kg1 Be2!!>

A real beauty, the white king has an escape route of f1, e2, d2 but instead black forces white to choose between his king and his queen!

18 Qxe2/Bxe2/Rxe2 Qh2+ 19 Kf1 Qh1#

Now the choice is obvious. The queen is going to be the loser in white's decision process and the main reason for this is white can save Ne6 and then, at this point in time, white can stay reasonably equal; Q v R + N + B. So the only question is how does white decide to give up its queen?

18 f4 Bxd1 with either Rxd1 Qg4 or any other move Bf3

18 Ndf4 Bxd1 19 Rxd1 fxe6 20 Ne2 Bh2+ 21 Kf1 Qh3+ 22 Ke1 Qxf3 23 b4 Nd7 24 Bb2 Rf1 25 Kd2 Qxf2 26 Rf1 Qxf1 27 Qxf1

<18 Nef4 Bxd1>
<19 Rxd1 c6!>
<20 Nc3 g5>
<21 Ne2 Qh3!>
<22 f4 Nd7>

Okay the last 5 moves have been conjecture and really I have no idea what will happen in the main line, but white looks pretty cramped, black looks very free to move with Kh8 and Rg8 coming or black can play Nf6 and Ng4 either way its looking pretty bleak for white!

Time to check...

~~~

Doh! and I was so smug having found Be2 I thought I must have found it!

Apr-22-12  LoveThatJoker: Cool! A Peter Acs puzzle!

<16...Bf5+!>

It is amazing how this B commences the combination by placing itself defensively with tempo, yet also comes to serve of supreme importance, within a few moves, in the attack.

<17. Kg1>

(17. Kg2 Qh3+ 18. Kg1 Bh2+ 19. Kh1 Bg3+ 20. Kg1 Qh2+ 21. Kf1 Qxf2#)

<17...Qh2+ 18. Kf1 Bg3!!>

The first beautiful point.

<19. Qd2>

[19. Qc2 Bh3+ (19...Bxd3+!! also mates) 20. Ke2 Qxf2+ 21. Kd1 Qxe1#; 19. fxg3 Bh3#; 19. Ke2/Nanyf4/Bxf5 Qxf2#; 19. Qe2/Re2/Be2 Qh1#; 19. Nf6+ gxf6 ; 19. Ne7+ Kh8 20. Ng6+ (20. Nxf5 Qxf2#) 20...fxg6 ]

<19...Bxd3+!!>

The final beautiful point!

<20. Qxd3/Qe2/Re2 Qxf2#>

LTJ

Apr-22-12  morfishine: When a GM loses in 18 moves, you can bet he erred in the opening. So the fun here is to improve for White. How about <10.Bxh7+ Kxh7 11.Qd3+ Kg8 12.Ng3 Be6 13.f3 Nf6 14.e4>


click for larger view

White threatens to win the piece back with <15.e5> while his Bishop aims for <g5> completing his development (albeit a piece down for a pawn)

Apr-22-12
Premium Chessgames Member
  FSR: <wenx: Is Bf1+ Kg1 Be2 possible??>

Earlier I wrote this:

<Cool idea, but much weaker than what Acs played - 16..Bf1+ 17.Kg1 Be2 18.Nef4! Bxd1 19.Rxd1 g5 20.e4 gxf4 21.e5 c6 22.Nxf4 and the game goes on.>

Even better than my original line is 20.Ne2! Qh2+ 21.Kf1 Qh1+ 22.Ng1 and now 22...Bh2 23.Ke2 Bxg1 23.Nxc7 or 22...c6 23.Nc3 Bh2 24.Ke2 Bxg1 25.Bd2. White will win the bishop and be left with the winning material advantage of R+BB against Q.

Apr-22-12  LoveThatJoker: Alright! Beautiful combination by GM Peter Acs. I'm glad that I was able to partake in the beauty of this game by solving today's puzzle correctly.

I end the week with 6.6 out of 7 for a pass; and I am currently on a four straight correct solve streak!

LTJ

Apr-22-12  goodevans: <psmith: with regard to the suggestion of 16. Bg6 above, 16... Rxg6 17.Nxg6 hxg6 18.Nf4 g5 19.Ng2 Qxf2 20.Rg1 Qg3 21.Nf4 Qh4 22.Ng2 Qh6 seems to do the trick.>

22.Qe1 is better, but the resulting trade off leaves white with a pretty hopeless endgame.

Apr-22-12
Premium Chessgames Member
  FSR: <morfishine: When a GM loses in 18 moves, you can bet he erred in the opening. So the fun here is to improve for White. How about <10.Bxh7+ Kxh7 11.Qd3+ Kg8 12.Ng3 Be6 13.f3 Nf6 14.e4> [diagram omitted] White threatens to win the piece back with <15.e5> while his Bishop aims for <g5> completing his development (albeit a piece down for a pawn)>

Sorry, but I don't think too many GMs will be lining up to play this piece sac. One response is 14...dxe4 15.fxe4 Nc6, e.g. 16.e5? Bxe5; 16.Bg5? Bxg3 17.hxg3 Qxd4+; 16.d5 Bc5+ and 17...Ne5.

But even better is for Black to deviate earlier with 12...Qh4 13.h3 Nxf2!, or 12...Be6 13.f3 Nxh2! 14.Kxh2 Qh4+ 15.Kg1 Bxg3 and White can resign.

Apr-22-12  TheRavenPK: Beautiful combination, I would have never found those moves. BTW, I would call this game "Acs is high". http://www.youtube.com/watch?v=4Sam...
Apr-22-12
Premium Chessgames Member
  agb2002: Black is a rook and a knight down.

White threatens Nexc2.

Black either delivers mate soon or recovers as much material as possible. This suggests 16... Bxe6+ 17.Kg1 (17.Kg2 Qh3+ 18.Kg1 Bh2+ 19.Kh1 Bg3+ 20.Kg1 Qh2+ 21.Kf1 Qxf2#) 17... Bxd5 (17... Qh3 18.Nf4 looks bad for Black) 18.e4 Qh3 19.h4 but the attack seems to vanish.

------

The obvious 16... Qxf2, threatening 17... B(Q)g2# and 17... Qh2#, is met with 17.Nef4 followed by Qe2

------

Similarly, after 16... Bg4+ 17.Kg1 (17.Kg2 Qh3+ and mate soon) 17... Qh3 18.Nef4 and Black looks lost.

------

Another option is 16... Bf1+ 17.Kg1 Be2 (17... Qh3 18.Nef4 again) with the double threat 18... Qh2# and 18... Bxd1:

A) 18.B(Q,R)xe2 Qh2+ 19.Kf1 Qh1#.

B) 18.f4 Qg4+ 19.Kh2 Bxd1 20.Rxd1 (20.Nexc7 Bf3) 20... exe6 21.Rg1 Qh4+ 22.Kg2 exd5 - + [Q vs R].

C) 18.Nef4 Bxd1 19.Rxd1 g5 20.Ne2 (20.Ng2 Qh2+ 21.Kf1 Qh1+ 22.Ke2 Qxg2 - + [Q vs R+B]) 20... Qh2+ 21.Kf1 Qh3+ (21... Qh1+ 22.Ng1 Bh2 23.Ke2 Bxg1 24.Bd2 followed by Rxg1) 22.Ke1 (22.Kg1 Bh2+ and mate soon) 22... Qxf3 23.Ndc3 c6 24.Be4 and Black doesn't seem to have enough compensation for the material.

I think I'd play 16... Bf1+ and 17... Be2.

Apr-22-12  sevenseaman:


click for larger view

White to play.

With both players threatened with a back rank mate you have to fine-tune your move order.

Its not easy to calculate all the way but as White what are your first three crucial moves. (I do not think any experienced players will go wrong).

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