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Aleksander Wojtkiewicz vs Spyridon Skembris
Novi Sad Olympiad (1990), Novi Sad YUG, rd 12, Nov-30
English Opening: Agincourt Defense. Catalan Defense (A13)  ·  1-0

ANALYSIS [x]

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sac: 25.Rd7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Feb-15-09
Premium Chessgames Member
  Domdaniel: <drnoooo> If you mean 27.Ng6+ Kh7 28.Nxf8+ Rxf8 29.Qxf8 then it looks drawn after 29 ... gxf6. White is a piece down but has compensation and chances of a perpetual, but no more.

Unless you meant something else.

Feb-15-09
Premium Chessgames Member
  Gilmoy: Chuckle. Actually, Be4 was the first thing that leaped out at me, because an imp was hopping on my shoulder chattering "It's that Fischer game against the Myongolian for an Anastasia Qxh7!" -- see Fischer vs Myagmarsuren, 1967. I shushed the imp with a bowl of milk, studied the rest of the board, and found <25.Rd7> after about 30 seconds.

<mollyboo:> There is no trick to pawn storms. It's the slowest possible attack, and the only way it wins is if your opponent is trying an even slower one on the other side of the board. *boomp-chh*

Some openings that regularly feature pawn storms are:

- King's Indian (before 2006?), Black storms the Kingside (note how modern Bayonet Attack is a White counter-storm on the Queenside, targeting d6 with heavy-invasion at c7)

- Sicilian with opposite castling, White storms the Kingside, Black storms the Queenside

- Sicilian, Dragon, Yugoslav Attack (before 1990?), White mini-storms the Kingside (and did well enough to prompt Fischer's boast of "sac, sac, mate")

Play through lots of those games to get a feel for the pawn storms. The date limits indicate advances in modern theory that has caused some lines to fall out of favor -- e.g. Black's KID pawn storm has scored so well in the past that nowadays everybody plays anti-storm lines.

(Here's a grand puzzle for all chessgames.com readers: On which positional clues should Black <not> try the KID pawn storm, and switch to Q-side Benkish pressure instead?)

The uber-theme behind all pawn storms is your piece strength behind the pawns. Pawns do nothing by themselves. Your goal is always to open one line, and then exploit with your pieces.

Cases in point:

A. A couple of canonical sac patterns involve advanced pawn + piece sac: <Greco> Kh8, Rh1, h5, Nh4: Ng6(+) to open h, <swinging gate> Kh8, Rg1, Rh1, h6: Qg7+!! to open h with double-check and a triangle mate: Capablanca vs T A Carter, 1909, Stanishevsky vs Nikonov, 1981. Mnemonic: <Push that P to 6 or 3!>

B. Yugoslav Attack lines (before everybody and his whipped puppy learned not to let White do this): The point of White's h5-hxg6 is to half-open h for Qh6+: <It's all about the Queen entry.> Be3-Qd2-Bh6 is preparation, Bc4-Bb3 pins f7, and if White gets half-open h, then Black has a <Qh8 dilemma>. This is a classic example of pieces and a pawn storm all working harmoniously. Note how White spends about 6 piece moves to prepare the threat, then pushes with just one pawn, and follows up with piece strength.

C. Sometimes you push a pawn to 5, then sac a piece on 6 just to invite the line-opening condition. Ostapenko in D Ostapenko vs S Kurkin, 1970 gave his Queen!

Feb-15-09  TheBish: Wojtkiewicz vs Skembris, 1990

White to play (25.?) "Insane" (4 stars)

It's nice to see a mini-tribute to Aleks Wojtkiewicz this week; he died much too young.

The only thing that seems worth analyzing is 25. Rd7! Bxd7 (pretty forcing since 25...g6 is answered well by 26. Qxg6+ fxg6 27. Rxc7 with a healthy pawn up and rook on the 7th for a big endgame advantage) 26. Qxf7+ and now:

a) 26...Kh7 27. Nxd7, threatening 28. Qxe8 as well as 28. Nxf8+ winning the queen; if 27...Rc8 28. Be5! (even stronger than Nxf8+) Bd6 (or 28...Qd8 29. Nf6+ gxf6 30. Bxf6+) 29. Nf6+ Kh8 30. Qg6 gxf6 31. Bxf6+ Ng7 (Qg7 lasts longer, but is still losing) 32. Be4 Kg8 33. Qh7+ Kf8 34. Qh8+ Kf7 35. Qxg7+ Ke8 36. Bg6+ and mate next move; if 27...Qc8 28. Be4! and there is no defense to 29. Nxf8+ and 30. Qxg7#.

b) 26...Kh8 27. Be4! With Black's pieces tied up (Bd7 pinned and gxf6 not possible because of Ng6#), White now threatens 28. Ng6+ Kh7 29. Nxf8+, since 28...Rxf8 29. Qxg7 mates. Now if 27...Ne7 28. Ng6+! Nxg6 29. Qxg6 Kg8 30. Qh7+ Kf7 31. Bh4! (threatening Bg6 mate) e5 32. Bg6+! Ke6 33. Qg8+ Kd6 34. Qd5 mate. Time to check!

Nov-30-13  Conrad93: Balls of steel.
Jan-03-21
Premium Chessgames Member
  al wazir: I think 28. Bf5 wins equally fast. For example, 28...exf5 29. Ng6+ Kh7 30. Nxf8+ Kh8 31. Qxg7#.
Jan-03-21
Premium Chessgames Member
  An Englishman: Good Evening: Already knew this one, but still a delight to revisit.
Jan-03-21  Sacrificed pawn: My take on this Insane Puzzle -
In the Legendary words of......
Ohp ivory mistake its bind Rd7 gacky grubby verdict abracadabra mib ivory Qxf7 fluff a bridge vocal laggy gotcha a cuffy muffy aids o vow on ohp ivory backs cement melty lenty trawl qi fozzy hop pj jude x its bike canaries vocal lorry whoosh doot mop bind ivory Nxd7 hubbles able ...
Jan-03-21  Sacrificed pawn: No offense to anyone from my previous kibitz :)
Jan-03-21  KevinDenelsbeck: That was pretty.
Jan-03-21  Walter Glattke: 25.g4? gxf6 26.gxf5 exf5 27.Rd3 Qxe5 28.Rg3+ Bg7 (29.Qxh6? Qxg3 30.hxg3 Bxh6) 29.Re3 Qa1+ 30.Bf1 Rxe3 / 27.Bd5 fxe5 28.Rd3 f4 /25.Bh4 Qxe5/25.Rd7! Bxd7 26.Qxf7+ Kh8 27.Nxd7 wins
Jan-03-21  Sacrificed pawn: For the mere mortals who cannot decode my previous transcription, I give it in their language -

I instantly saw 25.Rd7 because black can't capture it with the Queen, so Bishop comes in between(Capturing the Rook). Then the Pawn on f7 is undefended. Now comes 26.Qxf7 and black King goes to h8.

Here I went with 27.Ng6+ and thought that after 27...Kh7 comes 28.Nxf8 with Check and I assumed that black would not capture the knight with his rook and I would be generating windmills. But why wouldn't he(Gender Neutral)? After 28...Rxf8 29.Qxf8 gxf6 Black is a piece up.

Then I saw the solution. I realized that 27.Be4 was the move instead of 27.Ng6+ and I also realized that after 27.Ng6+ Kh7 28.Nxf8 black simply plays 28...Rxf8

I knew that this 28.Nxf8 move was silly but I still ran it through Stockfish for the peace of my mind. And Guess what, I found two new drawing variations which are given below -

a) If Black takes the Bishop - 29.Qxf8 gxf6 30.Qxf6 Bc8 31.Be4 Qxc4 32.Qf7+ Kh8 33.Bxf5 Qc1+ 34.Kg2 exf5 35.Qf8+ Kh7 36.Qf7+ Kh8 =0.00 (29 ply) b) If Black doesn't take the Bishop - 29.Qxf8 Qxc4 30.h3 Qc1+ 31.Kh2 Qd2 32.g4 Qf4+ 33.Kh1 Qc1+ 34.Kh2 Qf4+ =0.00 (28 ply)

But the draw is not what white has to settle for. Hence I Failed to solve this insane puzzle but I still learned something.

Jan-03-21  Brenin: The interference 25 Rd7 is easy to see, but it is harder to see that after 25 ... Bxd7 26 Qxf7+ Kh8 White has time to bring the LSB into the attack, and undermine Black's K-side defence with 27 Be4. Black would have done better to give up Q for R+N with 25 ... Qxd7 26 Nxd7 Bxd7, when White's attack is over and he has to start retreating with 27 Be5.
Jan-03-21  AlicesKnight: Saw Rd7 as the way in, and found myself agreeing with <Brenin> on the next part. The rot seems to have set in from move 16 with the d7 square pivotal.
Jan-03-21
Premium Chessgames Member
  Honza Cervenka: White could have won the game faster playing 22.Qh5. Black has no satisfactory way to cover f7, as after 22...g6 white plays simply 23.Qf3. 22...Rxd1+ 23.Rxd1 Ng6 is bad not only for 24.Nxg6, which is sufficient, but mainly for 24.Nxf7 Kxf7 25.Be4. 22...Rxd1+ 23.Rxd1 g6 24.Qf3 Qc7 25.Nxf7 or even 25.Ng4 with intention 26.Be5 and 27.Nf6+ or eventually Qf6 wins easily.
Jan-03-21  Cheapo by the Dozen: What <Brenin> said. And I overlooked the ... Nd6 defense, which is what makes the Be4 maneuver necessary.
Jan-03-21
Premium Chessgames Member
  chrisowen: Lambast over like 27.Be4 adds the way for white giving him a five plus lead after Qd6. The gap begins with 25.Rd7 good and direct accommodate like a mind over for breaking coordination around black’s king. Hobble pg6 does feel like a little better than Nf5 honours about it low and foggy it is. Fandangle rd7 a muddle pg6 hey figure mack against a quick knockout in fact, nf5 only quickens his demise to absolve. Alms and almshouses the general hubbub to fuse it on a dint cover with like a wind up rd7 clock motion umm good viktor, crikey a quip opportunity gets knocked in peg back just rd7 its managed to be a minute good bomb zone cut iffy it is dealt with aplomb like Qxd7 a bridge too far ahoy rovers tried it 25...Bxd7 ever a cliff-edge mainframe aghast pull a rug from under his feet Qxf7+ affable quick and clean good fun pave the way for a bubble find nf5 vilification will go against the grain. Kh8 egs keep out of the pin around h7 over arrive the key, long may your big jib draw Kh7 more fanning the flames nd7 looks good and apt but the real star move Be4 ghosting additional firepower over a deathly hedge it is curtains and a wasteland for total high ground ace e4 wins the day.
Jan-03-21
Premium Chessgames Member
  drollere: @ <Sacrificed pawn> let me know if you are just evans under a new user name ... so i can block you.
Jan-03-21
Premium Chessgames Member
  agb2002: Black threatens gxf6.

The first idea that comes to mind is 25.Rd7 Bxd7 26.Qxf7+:

A) 26... Kh7 27.Nxd7

A.1) 27... Qc8 28.Bxb7

A.1.a) 28... Qxb7 29.Nxf8+ and 30.Qxb7 wins decisive material.

A.1.b) 28... Re7 29.Qg6+ and 30.Bxc8 wins decisive material.

A.2) 27... Rc8 28.Nxf8+ Kh8 (28... Rxf8 29.Qxc7 wins) 29.Ng6+ Kh7 30.Ne7 looks winning (30... Nxe7 31.Qxg7#; 30... Rb8 31.Qg6+ Kh8 32.Bxg7+ Nxg7 33.Qxh6#).

B) 26... Kh8 27.Be4 (27.Ng6+ Kh7 28.Be4 Qd6 and Black seems to hold)

B.1) 27... Qd6 28.Nxd7

B.1.a) 28... gxf6 29.Qxe8 Kg7 30.Qxf8+ Qxf8 31.Nxf8 Kxf8 32.Bxb7 wins decisive material.

B.1.b) 28... Rc8 29.c5 Qd1+ 30.Kg2

B.1.b.i) 30... gxf6 31.Nxf8 Ng7 32.Ng6+ Kh7 33.Ne7+ Kh8 34.Qg6 wins.

B.1.b.ii) 30... Ne3+ 31.fxe3 Qe2+ 32.Kh3 looks winning for White.

B.2) 27... gxf6 28.Ng6#.

B.3) 27... Rc8 28.Ng6+ Kh7 29.Nxf8+ Kh8 (29... Rxf8 30.Bxf5+ and mate next) 30.Bxf5 wins (30... exf5 31.Qxg7#).

Jan-03-21
Premium Chessgames Member
  Jimfromprovidence: I am not quite so sure why 29...Nd6?! is not a good defense for black.


click for larger view

It seems like if 30.Qg6 Nxe4 31.Qxe8 Nxf6 32.Nxf6 Qd6 occurs, it is not that bad.


click for larger view

Maybe the pinning of the black bishop enables white to pick up pawns?

Jan-03-21  Sacrificed pawn: <drollere> No. I am a completely different individual. And I don't think it's Evans, you want to block ;)
Jan-03-21  Everett: create interference along the 7th
Jan-03-21
Premium Chessgames Member
  SteinitzLives: Kind of curious as to how fast Wojo played the last 6 or 7 moves after 25 Rd7. Two of my close friends took lessons from him about 10 years before his death, and they were astounded by the speed at which he could see tactical patterns.

It was fairly common when they would show him their games that he would for example say immediately after a move, something like: "there is mate in 5" or "black wins material in 4". He would show this often after he had for an hour or so been drinking the student's liquor too!

We will never know just how truly great a player he could have been.

Jan-03-21  Granny O Doul: @Jim: White can trade down to a trivially winning pawn ending with 33. Nd7 at the end of your line.
Jan-03-21
Premium Chessgames Member
  Honza Cervenka: < Jimfromprovidence: I am not quite so sure why 29...Nd6?! is not a good defense for black.

It seems like if 30.Qg6 Nxe4 31.Qxe8 Nxf6 32.Nxf6 Qd6 occurs, it is not that bad.>

You can prolong this line 33.Nd7 Kg8 34.Qxf8+ Qxf8 35.Nxf8 Kxf8 36.Kf3 and white has a won Pawn ending.

Jan-03-21
Premium Chessgames Member
  Breunor: Al Wazir, 28 Bf5 unfortunately doesn't get the job done and can be trouble:

1) -1.25 (27 ply) 28...exf5 29.Nxd7 Qe6 30.Qxe6 Rxe6 31.Be5 Re8 32.f4 Kg8 33.Kf2 Rd8 34.Nxf8 Kxf8 35.Ke3 g5 36.a4 Kf7 37.c5 Ke6 38.b5 axb5 39.axb5 Rd5 40.Bd6 gxf4+ 41.Kxf4 Rd2 42.h3 Rd4+ 43.Ke3 Kd5 44.Kf3 Rc4 45.b6 Kc6 46.Ke3

The text move Nxd7 is winning, although the computer actually likes Kg2 also.

After 28 Nxd7:

1) +3.91 (24 ply) 28...Qd1+ 29.Kg2 Nd6 30.Qg6 Nxe4 31.Qxe8 Nxf6 32.Nxf6 Qd6 33.Nd7 Kg8 34.c5 Qd5+ 35.f3 Qf5 36.g4 Qc2+ 37.Kh3 Qe2 38.Qxf8+ Kh7 39.Nf6+ gxf6 40.Qf7+ Kh8 41.Qxf6+ Kg8 42.Qg6+ Kf8 43.Qxh6+ Kf7 44.f4 Qc2 45.Kg3 a5 46.Qh5+ Ke7 47.bxa5 Qc3+ 48.Kh4 Qc2 49.Qe5

Jiimfromprovidence, computer agrees that 29 Nd6 is best, but it agrees with Honza that black is still badly lost.

1) +3.95 (30 ply) 29...Nd6 30.Qg6 Nxe4 31.Qxe8 Nxf6 32.Nxf6 Qd6 33.Nd7 Kg8 34.c5 Qd5+ 35.f3 Qf5 36.g4 Qf7 37.Qc8 Qf4 38.Nxf8 Qxf8 39.Qxb7 Qf4 40.Qxa6 Qd2+ 41.Kf1 Qd1+ 42.Kf2 Qd4+ 43.Ke2 Kf7 44.c6 Qb2+ 45.Kf1 Qc3 46.Kg2 Qd2+ 47.Kh3 Qd5 48.Kg3 Qd6+ 49.f4 Qd4 50.Qe2 Qc3+ 51.Qf3 Qc4 52.Kg2 Kf6 53.Kg3

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