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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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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 4 OF 5 ·  Later Kibitzing>
Apr-22-12
Premium Chessgames Member
  agb2002: I have realized after reviewing the game that I knew the combination but for some reason this time my memory didn't work.
Apr-22-12  LoveThatJoker: <sevenseaman>

1. RxR! QxR

[1...RxR 2. Q-N8+ Q-B1 (2...B-B1 3. BxB wins; 2...R-B1 3. QxB wins) 3. QxR wins material]

2. QxB wins as

a) 2...QxQ 3. BxQ and White is a piece up.

b) 2...Q-B8+?? 3. RxQ RxR+ 4. B-B1

LTJ

Apr-22-12  LoveThatJoker: <sevenseaman> For the sake of completion, it should be noted that after 1. RxR! RxR 2. Q-N8+ B-B1 3. BxB, Black has a decent resource in 3...Q-Q1.

This said, Black still loses after 4. BxN PxB 5. P-KR3! (5. QxP? R-B8+! 6. RxR QxQ and Black is probably slightly better) 5...QxB (5...RxB 6. QxKP winning) 6. QxP wins due to White's two connected Queenside pawns.

LTJ

Apr-22-12  sevenseaman: <LoveThatJoker> Your solution is fine. I did not expect you to make any mistake. CT sol (3 moves only)is same as yours;

1. Rxc7 Qxc7
2. Qxb7 Qxb7
3. Bxb7 *

The game went like this but how it is shown ended as draw is not clear.

( 1. Rxc7 Qxc7 2. Qxb7 Qxb7 3. Bxb7 Rc2 4. Rd1 f6 5. Bd5+ Kf8 6. b4 b5 7. Bb3 Rc6 8. e4 Ke7 9. f3 )

Apr-22-12  LoveThatJoker: <sevenseaman> It is unfortunate for the player of the Black pieces that he missed the sub-variation 1. Rxc7! Rxc7 2. Qb8+ Bc8! 3. Bxc8 Qd8! with quite the lovely tactictal nuances afterwards.

Black of course would still have had the short-end of the stick, but it was a much better chance than going a piece down.

LTJ

Apr-22-12  Zatrikion: I wonder if Black in todays puzzle could have also win through the famous "bishop classical sacrifice" after white's 19.a3 move (19..Bxh2+). Can not see a proper defense for white
Apr-22-12  shaikriyaz: easy week this was. I even got the Sunday puzzle right! this is my favorite attack with double bishops and queen on a castled king! finished off coolly:)
Apr-22-12
Premium Chessgames Member
  morfishine: <FSR> Yes, that was a poor example. Perhaps we need look at <9.a3> which seems a waste of time. Frankly, IMO, the sequence <7.Ne2> <8.0-0> <9.a3> seems poor on the whole
Apr-22-12  TomOhio: I tried Qxf2 as well. ARGH!

In the end, the game line gives Black THREE possible mating moves. Never had one of those in my entire life. Wow.

19.exg3 Bh3#
19.Re2 Qh1#
19.Qe2 Qh1#
19.Ke2 Qxf2#

Apr-22-12  ajax333221: I analyzed Bg4 with Houdini to see if it was also winning, and it isn't!

Whites can /eventually/ play Bxh7+ and create a scape route for the king!

Apr-22-12  King Death: < ajax333221: ...and create a scape route for the king!>

Is that like making a scapegoat out of his king?

Apr-22-12  Patriot: Material? The position looks so dynamic I didn't even notice!

I think the best continuation is 16...Bf1+, leaving only one response.

17.Kg1 Be2

The idea is to "fill" e2 with a white piece so that mate is possible with 18...Qh2+ 19.Kf1 Qh1#. White can throw in a few spite checks (18.Bxh7+ Kh8, 18.Ne7+ Kh8, 18.Nf6+ gxf6 looks fine). Or he could toss the queen and play 18.Nef5 Bxf5 19.Nxf5 Bxd1 20.Rxd1. Actually black looks lost in this line (Q vs. R&2B), so either I missed something good here or this sequence doesn't work!

Another option is 16...Bxe6+. 17.Kg1 and now perhaps 17...Bh3 again but 18.e4 puts a damper on things. This is more difficult than first suspected because there is a fine line between winning and losing here.

How about 16...Bg4+ 17.Kg1 Qh2+ 18.Kf1 Qh1+ 19.Ke2 Qxf3+ 20.Kd2 which doesn't look right either.

Oh well, I've spent quite enough time on this. There are so many options.

Apr-22-12  Patriot: Sorry, I meant to say 18.Nef4 Bxf4 etc.

It's not easy to calculate 16...Bf5+ here because of so many options and defenses, and it's the only win.

Apr-22-12  vardeep: thank you dzechiel and FSR.. ah.. so easy for amateurs like me to overlook Nef4... great combination.... really good POTD for a sunday...
Apr-22-12  cyclon: Nice. 16. -Bg4+ 17. Kg1 < (17. Kg2 Qh3+ 18. Kg1 Bh2+ 19. Kh1 Bg3+ 20. Kg1 Qh2+ 21. Kf1 Qxf2X )> 17. -Qh2+ 18. Kf1 Bg3 and now, because the threat is 19. -Qxf2X, if White plays 19. Qd2/Qc2 follows; 19. -Bxf3 20. fxg3 Qh1+ 21. Kf2 Qg2X - yet, if 19. Re2 Qh1X and 19. fxg3 Bh3X. Let's check.
Apr-22-12
Premium Chessgames Member
  chrisowen: You fancy him strengthen class move snack bf5+ us hard to you arete

excellence for black Loeks 9.a3 goes up in energy make room to get bb2

presumeably it saves a tempo over b3 at seekless 14.nf4 draw by repeat

kg1 stops bxh3 how learned black must have been just to get encroach for

bnqr all debunked to squeeze Wely down ball of flames started by

10...nh2 and end man 18...bg3.

Apr-22-12
Premium Chessgames Member
  chrisowen: Clear coup horse flamboyance, shepherded by major onslaught to follow

unknown path after pawn push new green land but black seems at home to

escalate the surge even left ra8 nb8 tucked back needed on lynch to

speak bf5+ and the real.

Apr-22-12
Premium Chessgames Member
  chrisowen: Cracker bg3 smooth launch to pad off mate by strangulated monarch f1 has

no room to breathe as qd2 suffers from bxd3+ whereby 20.qxf2# seals the

deal a top gm exasperated from out of nowhere comes the ragged bull to

claw ground away from the dutch maestro apparently bowled over run all

at sea must have been fun to see the look granted down a mere matter of

18 moves rightly stumped from the get go a3.

Apr-22-12  James D Flynn: First candidate 16.Qxf2 (threatening mate on g2 or h2) 17.Nef4(defends against both threats) Qg3 (renewing the threat of Bg2+) 18.Qe2 Bg2+ 19.Qxg2 Qxe1+ 20.Bf1 and White is still 2 pieces up and the attack peters out. Second candidate 16..Bxe6+ 17,Kg1(not Kg2 when Qh3+ mates in 4) Bxd5 (now Black is only the exchange down and threatens to win the White Q by Q checking on h2, h3 and Bxf3 ) 18.e4 (if Nc6 19.exd5 Qh2+ 20.Kf1 Nxd4 22.Bxh7+ Kxh7 23.Qxd4 and White is a R up and the attack is spent), Whar if Black doesnt take the 2nd N? 17Qh2+ 18.Kf1 Bg3 and White cannot take because Bh3# but must defend f2 by 19.Qd2(not Qc2 because after the K is pushed to e2 and Qxf2+ the R on e1 would hang) Bh3+ 20.Ke2 Qxf2+ 21,Kd1 Qxf3+ 22,Qe2 Qxd5 23.Rg1 Bh4 24.Qh2 Qd7 25.Rh1 Bg4+ 26.Kc2 g5 and Black has 2nited passed pawns for the exchange with an unclear endgame. Is there better? Third candidate 16..Bg4+ 17.Kg1 Qh2+ 18.Kf1 Bg3 (again if 19.fxg3 Bh3# ) 19.Qd2 Bxf3 and the Q threatens mate on g2 or h1 White cannot defend both squares and if 20.Ne7+ or Bxh7+ Kh8 and White runs out of checks. Now for the game.
Apr-22-12  cyclon: 16. -Bf5!!. So, my line was inaccurate and maybe even faulty - I haven't analyzed the position after ( 16. -Bg4+ ) 17. Kg1 Qh2+ 18. Kf1 Bg3 19. Bxh7+ <( THIS is prevented by 16. -Bf5!!, White King now escapes via e2-d3 )> 19. -Kh8 20. Ke2 Qxf2+ 21. Kd3 Bxf3 game gets even wilder. It would be interesting to know what 'silicon valley' says about that position - it's estimation. Heaven only knows without a computer program.
Apr-22-12  lost in space: I found this line most promising:

16...Bg4+ 17. Kg1
(17. Kg2? Qh3+ 18. Kg1 Bh2+ 19. Kh1 Bg3+ 20. Kg1 Qh2+ 21. Kf1 Qxf2#)

17...Qh2+ 18. Kf1 Qh3+ 19. Ke2 Bxf3+ 20. Kd2 Bxd1 21. Ndf4 Qf5 and Black has a decisive advantage


click for larger view

Apr-22-12  lost in space: Hmmmm, really nice mate after 16...Bf5!!.
Apr-22-12  Marmot PFL: Didn't get it I'm afraid.

Acs joins the Beat Van Wely in 20 Moves or less club that includes Ivanchuk, Topalov, Morozevich, Svidler, Nakamura and several less well known players.

Apr-22-12
Premium Chessgames Member
  whiteshark: Wow, remarkable, Black starting an attack out of the blue.
Apr-22-12
Premium Chessgames Member
  Jimfromprovidence: < al wazir> <Abdel Irada> Wow! I did not see that after 16...Bxe6+ white also has another saving move after 17 Kg1 Qh2+ 18 Kf1 Bg3, with 19 Bxh7+. (I thought only 19 Qd2 was good)


click for larger view

White gives up a piece to create a path to d3 for his king. (seeing 19...Kxh7 20 Ke2 Qxf2+ 21 Kd3). Very instructive.


click for larger view

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