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Matthias Wahls vs Artur Yusupov
Bundesliga (1991/92), Germany
French Defense: Winawer. Advance Variation General (C16)  ·  0-1
ANALYSIS [x]

FEN COPIED

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sac: 46...Rxh3 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
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Apr-20-08
Premium Chessgames Member
  Gilmoy: I recognized the <bowling alley> pattern. Black could sac any one of his pieces to expose g+h, then mate with the other two. White's K hides safely in the shadow of Black's g3-pawn -- but he cannot venture onto h, so his "protection" of h3 is illusory.

I quickly saw the line 44..Rh5 45.Kg2 Rxh3 46.Kxh3? g2 <he's lost touch with the shadow> . Now White's Rf1 cannot stop the mate on h (only 47.Qe1 or 47.Rg3), so Black will queen with check, with quick mate (e.g. 47.Qe1 gxf1+ 48.Rxf1 Qg2+ 49.Kh4 Rh7#).

So the real point of 45.Kg2 must be to allow 46.Rh1=, and White will just ignore any R sac.

Apr-20-08  pinakin8: My solution was 43...Qg4;
Does anybody know how black wins after 46.Rh1.
Apr-20-08  RandomVisitor: <pinakin8>If 46.Rh1 there is 46...Qc2+ 47.Kg1 d4 or g2.
Apr-20-08  TrueBlue: not too difficult, the first line I tried was close to the answer
Apr-20-08
Premium Chessgames Member
  DarthStapler: I got the first move
Apr-20-08  RandomVisitor:


click for larger view

Rybkav2.3.2a.x64: 22-ply

1. (-4.66): 43...h3 44.gxh3 Qh7 45.b6 axb6 46.Qxb6 Qxh3 47.Qb2 Rh5 48.Qg2 Qg4 49.f5 Rh2 50.f6 Rxg2+ 51.Kxg2 Rh7 52.Rxg3 Qe2+ 53.Rf2 Qh5 54.Rff3 Qxe5 55.a5 Qe2+ 56.Kg1 Qc2 57.f7

2. (-1.12): 43...Rg8 44.Re1 h3 45.Re2 Rh5 46.f5 Qh7 47.Rxg3 Rxg3 48.Qxg3 hxg2 49.Re3 exf5 50.Rf3 Qh6 51.Qxg2 f4 52.e6 Qxe6 53.Kf2 Qe4

3. (-0.66): 43...Qg4 44.Qe2 Kg8 45.a5 Rxf4 46.Qe3 Rxf3 47.Rxf3 Qe4 48.Qxe4 dxe4 49.Re3 Rb7 50.Rxe4 Rxb5 51.Kf1 Rxa5 52.Rxh4 Rc5 53.Ke2 Rxe5+ 54.Kf3 Rc5 55.Rh6 Rd5 56.Kxg3

Apr-20-08  Dr. J: After 43... h3, 44 gxh3 <Random Visitor>'s Rybka apparently agrees with Yusupov that ... Qh7 is best. But I was analysing along the same lines as <Gilmoy>: 43 ... h3, 44 gxh3 Rh5 followed by ... Rxh3, with what looks like decisive attack, since if 45 Kg2 Rxh3 46 Kxh3 Qh7+ and mate next (a small improvement on Gilmoy's 46 ... g2). Here 46 Rh1 is no improvement: 46... Rxh1, 47 Kxh1 Qh7+

Incidentally, if White doesn't capture 44 gxh3, then ... hxg2 with (I assumed) unstoppable attack.

If one aagrees that the above is adequate justification for 43 ... h3, then this hardly qualifies as an "Insane" puzzle. Indeed, given this position in a speedgame, I expect most of us would play 43 ... h3 with little or no hesitation!

Apr-20-08  Manic: The game <tpstar> mentions is worth a look at. The attack conducted by white is quite spectacular towards the end.

For some reason I never considered getting major pieces onto the h-file =/. Need to start looking at all my options in these puzzles.

Apr-20-08  stacase: YeeHaw! I got that first move! Also saw the need to keep Queenie on the B1 - H7 digonal. But I can't say I saw the rest move for move.
Apr-20-08  MenisfromVenis: got h3 in 10 sec or so, but the rest!? no way, though glad to see I did better than dzechiel for the first time :)
Apr-20-08  patzerboy: The first move was obvious. I wouldn't have attempted to solve the line in a game, but 43...h3 is a good-looking practical chance. I would then try to find the best followup. However, I'm not sure I would have seen how strong 44...Qh7 is during a game. It took several minutes of staring before the (fairly obvious) pin on the White Rook jumped out. Of course, in a game I would be staring for several minutes, so who knows? Cool combo, though.
Apr-20-08  234: Saturday puzzle <31. ...?> Apr-19-08 Tolnai vs J Klovans, 1991
Apr-20-08  shocksteel: can someone explain why 43... h3
44. gxh3, Rh5 does not work.
The only move I can see for white is Kg2, but that after Rxh3 white can't play Kxh3 or Rh1 without getting demolished.
Apr-20-08  Vash854: shocksteel, Probably instead of Kxh3 its better to play Rh1, looks drawish.
Apr-20-08
Premium Chessgames Member
  Jimfromprovidence: <Dr J.> <But I was analysing along the same lines as <Gilmoy>: 43 ... h3, 44 gxh3 Rh5 followed by ... Rxh3, with what looks like decisive attack,>

cc: <Shocksteel>

I looked at the same line but I think 45 f5! for white stops it.


click for larger view

Now his queen is under attack and black also has to worry about the threat of a passed pawn.

44Qh7 is such an outstanding move.

Apr-20-08
Premium Chessgames Member
  whiteshark: <Jimfromprovidence> I thought of <43... h3 44.gxh3 Rh5> with the idea of 45...Rxh3, too. As for the best <45.f5> I planed <45...exf5 46.e6 f4>


click for larger view

when 47...Qc2 became a major threat.

Apr-20-08
Premium Chessgames Member
  Jimfromprovidence: <Whiteshark> I overlooked 46...f4 in your continuation.

It looks like white gets to lose some pawns and eventually the match after 47 Qxf4.

He can't force a draw by repetition with his queen either.

Oh well, there's always a next time.

Apr-20-08  PinnedPiece: Looks like getting your Q to a clear diagonal (in this case b1..h7) is vital to winning K-side attacks with K-protection in place!
Apr-20-08
Premium Chessgames Member
  patzer2: For today's Sunday puzzle, Black exploits the weakened castled position with 43...h3!!

See <Random Visitor>'s Rybka analysis for best play followup. One amusing possibility underscoring the point of 44...Qh7! is that if White plays 45. Rxg3?, then the pretty cross pin with 45...Qxh3 wins immediately.

Apr-20-08
Premium Chessgames Member
  johnlspouge: Sunday (Insane): Black to play and win.

Material: Even. Black has a spatial advantage on the K-side, with a battery Rg7 and Qg6 opposite Kg1. White has a battery Rf1 and Rf3 opposite Rf5, which Pe6 protects. Black must take action, because the White Q-side majority already threatens and certainly wins the endgame. Black has 2 mobile Ps, Pd5 to deflect Qe3 and Ph4 to remove Pg3. Positionally, Black should maintain the wedge Pg3, to impede the flight of Kg1, and advance Ph4 to open the h-file. The Rf5 blockade of Pf4 should be maintained to prevent counterplay with the move f5 as long as necessary. The position of Qg6 is a liability should such counterplay occur. The Rg7 provides critical shelter for Kh8 if Qe3 checks on the back rank.

Candidates (43): h3, Qg4, Rh5, Rh2, d4

43d4 (threatening 44d3)

<As Toga shows below, my candidate draws>, but I did not delete my (today mostly verbal) processes, in case anyone is interested. Black's K-side attack was more autonomous than I expected, so most of my concern about the Q-side was unfounded.

If White does not capture, Pd4 deflects the White Qe3 from the a7-g1 diagonal and slows Q-side counterplay based on the move b6. At the mere cost of surrendering e4 and with no loss of tempo, the placement of Pd4 at d3 instead of d5 improves resources for the Black attack. White has 2 feasible captures. The first, 44.cxd4, slows the White Q-side counterplay and creates a passer Pc4. Thus,

44.Qxd4 h3, threatening

45hxg2 46.Kxg2 Rh4 47.Rh1 [else, Rh2+] Rxh1 48.Kxh1 Qh4+ etc.

Because closing the White K-side with h2+ loses to the White Q-side majority, Black must capture hxg2, to open the K-side. Black can force Kg1 into the open by invading at either h2 or h1. White has lost an essential tempo for defense and has 2 feasible moves.

(1) 45.Qe3 hxg2, and

(2) 45.Qd8+ (making Kh8 block Rg7) Kh7 46.Qd2 Qh3,

both followed by 46Rh4 and invasion on the h-file, with collapse of the White position.

Toga II 1.3.1 evaluates the position (with minus scores favoring Black):

[ply 15/45, time 00:45, value -1.18]

43...h3 44.gxh3 <<>Qh7> 45.Kg2 Rh5 46.Rxg3 Rxh3 47.Rxg7 Rh2+ 48.Kg1 Rh1+ 49.Kf2 <<>Qc2+> 50.<Ke1> Qb1+ 51.Kd2 Rxf1 52.Qxa7 Qd1+ 53.Ke3 d4+ 54.cxd4 Re1+ 55.Kf2 Qe2+ 56.Kg3 Rg1+ 57.Kh4 Rxg7 58.f5

<<>Two critical moves> are required to justify 43h3. The game line deviates from the best line at 15 plies at the indicated <move>!!! At deeper plies, White's defense improves to

[ply 16/73, time 07:27, value -2.21]

43...h3 44.<Rc1> Rh5 45.f5 exf5 46.e6 Rh4 47.gxh3 Re4 48.Qd2 Qxe6 49.Rd1 Re2 50.Qf4 Re1+ 51.Rxe1 Qxe1+ 52.Rf1 Qxc3 53.Rd1 Qc2 54.Qh4+ Rh7 55.Qd4+ Kg8 56.Qxd5+ Kg7 57.Qb7+ Kg6

According to Toga, with best play 43d4 yields a perpetual check:

[ply 17/67, time 08:03, value 0.00]

43...d4 44.Qxd4 h3 45.Qd8+ Kh7 46.Rd1 Rh5 47.f5 exf5 48.Rd7 hxg2 49.Rxg7+ Qxg7 50.Qd4 Rh1+ 51.Kxg2 Rh2+ 52.Kg1 Rh1+ 53.Kg2 etc.

although the return 45.Qe3 loses much as I described.

Like <dzechiel>, I take my hat off to anyone who got the winning idea, which is 43...h3 44...<<>Qh7> 49...<<>Qc2+>.

Apr-20-08  wals: static Evaluation: Who is in front, why, and by how much? Material is even, Black has three pawn islands against four and has the move so must be in front.

Dynamic Evaluation: How to crack the fortress? The h file seems the way to go, but how to go about it? Desperation stakes, use the hpawn with a twist.

Abstract Assessment: h4-h3, Rxg3, Qxg3, Qxg3 Rxg3

Candidate move: h3

43. ...h3 44.Rxg3 ...Qxg3 45.Qxg3 ...Rxg3 46.Kf2

PM=

Got one in, which is some consolation,

Fritz 11 didn't actually deride my line, just would have played it better

Analysis by Fritz 11: On my line Time 2min

1. (-9.81): 44...Qg6xg3 45.Qe3xg3 Rg7xg3 46.a4-a5 Rg3xg2+

Matthias Wahls - Artur Yusupov, Bundesliga 9192 1991

Analysis by Fritz 11: Depth 23 Time 11min 22

1. (-4.61): 43...h4-h3 44.b5-b6 a7xb6 45.g2xh3 Qg6-h7 46.Qe3xb6 Qh7xh3 47.Qb6-b2 Rf5-h5 48.Qb2-g2 Qh3-g4 49.Rf3-e3 Rh5-h2 50.Qg2-f3 g3-g2 51.Qf3xg4 g2xf1Q+ 52.Kg1xf1 Rg7xg4

2. (-1.07): 43...Qg6-g4 44.Qe3-e2 h4-h3 45.Rf3-e3 h3-h2+ 46.Kg1-h1 Rf5xf4 47.Rf1xf4 Qg4xf4 48.Re3-f3 Qf4-c1+ 49.Qe2-f1 Qc1xf1+ 50.Rf3xf1 Kh8-h7 51.a4-a5 Kh7-g6 52.b5-b6 Kg6-g5 53.Rf1-f3 Kg5-g4 54.Rf3-f1 Rg7-h7

(, 21.04.2008)

Apr-20-08  MaczynskiPratten: <purewal: What if 50. Ke1!> I had the same question. White seemed to be moving this way so why did he go back to g3, which as we see loses quickly? I guess Qb1+ must be the answer. If 51 Kd2 Rxf1 the double threat of Qd1# and Kxg7 seems to win (White does not seem to have a perpetual, Black's Queen can interpose on g6 at crucial moments). Again the Black Queen staying on the b1-h7 diagonal seems to be key. I think one has to see this to claim full credit for solving the puzzle - I missed it, I saw 43...h3 but not Qh7.
Apr-20-08
Premium Chessgames Member
  Jimfromprovidence: With complete hindsight, maybe white would have been OK if he had played 43 b6 instead of Rbf1.


click for larger view

Apr-20-08  malvar: My move would be 43...Qh7, keeping the a pawn protected and preparing the h pawn advance. The plan is to transfer one of the rooks to the h file. Black has a pretty good control over the dark squares so, trying to exploit the pawn blockade an that control to succeed.
Apr-22-08
Premium Chessgames Member
  kevin86: The brutal end comes after 53♔f2 ♕xf1+ 54 ♔g3 ♖h3+ 55 ♔g4 ♕g2+ 56 ♕g3 ♕xg3#

The whole problem here is for black to break the barricade of HIS OWN pawns. Sac-cing them is the best way...

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