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Alex Yermolinsky vs Patrick Hummel
CCA ChessWise Int (1999), Stratton Mountain, VT USA, rd 1, Jun-11
King's Indian Defense: Six Pawns Attack (E77)  ·  1-0



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Kibitzer's Corner
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Feb-21-16  RoyalPawn: Additionally, Patzer2, although the accuracy of the computers analysis is undeniable, at my level I would find it more useful to understand in this puzzles what key strategic topic went right or wrong that influenced the final result. For instance I consider in this game allowing the exchange of bishops in g7 key. The black king side is weakened and with the f6 Knight in a quest to not sure where, it was just a matter of time that a combination would arise. Not sure if you may agree but it would be great to know your analysis about this sort of strategic topics in your comments.
Feb-21-16  Razgriz: Nh5+ would definitely open up the king side to a queen attack that may lead to a material advantage.

I just didn't see it all the way through.

Feb-21-16  goodevans: l went with <24.Nh5 gxh5> (declining the sac leads to exactly the same position after 25.Qh6 gxh5) <25.Qg5+ Kh8 26.Qf6+ Kg8 27.Ra3 h4 28.e5>

l preferred 28.e5 because I wanted to keep black's pawn routed to f7 as long as possible. However it allows <28...Nxd5> and I'm not sure whether white's attack still succeeds after that.

Feb-21-16  morfishine: Pummel Hummel


Feb-21-16  schachfuchs: hehe in the final position on firstly omitting the Ph7 I thought: 'Oh wow, 5 connected free pawns!'

But also only the d+e+f pawn without opponent isn't bad, is it? ;-)

btw: I got as far as Patzer 24. Nh5 gxh5 25. Qg5+ Kh8 26. Qf6+ Kg8 27. Ra3

Premium Chessgames Member
  paulalbert: Got to 27 Ra3 in my own visualization but did not see through to the end and dealing with all the defensive tries by black.

Hummel, who was about 15 years old when this was played, made a good effort at trying to hold it together, but fending off three connected passed pawns at the end obviously hopeless, especially against GM Yermolinsky.

Premium Chessgames Member
  patzer2: <Royal Pawn> 24. Nh5! gxh5 25. Qg56+ Kh8 26. Qf6+ Kg8 27. Ra3 was what I found on my own, before checking the computer.

I saw White had at least a draw by perpetual in hand and was the only promising continuation.

I don't know how strategic my thinking was, but I figured I have a draw in hand against a much higher rated player. Continuing in an unclear position, where I can't see a clear win, risks losing the game.

This probably goes back to some good advice a Master friend of mine in Germany gave me. The advice being, if you can clearly see an advantage or a win then play the line. And if you can't see it, then don't play it.

When I was rated about 1650, I had Black against a Master in Nebraska. When I saw I could force a draw by perpetual sacrificing a couple of pieces, I didn't hesitate to do so. As I recall, I got more than a few rating points for that draw and for equaling the Master's performance in that tournament. Using this strategy helped boost my rating over 200 points in less than two years.

Feb-21-16  njdanie: What an awesome pawn storm coming at the end...
Premium Chessgames Member
  patzer2: <Once><Royal Pawn> Thanks for the kind comments. I'll pass then on to my Grandson.

P.S.: Against my advice, and likely a bit of mischievous 7-year-old rebellion on his part, in his second game my Grandson risked a scholar's Mate with an early Queen move. He won that game in four moves. When he faced a 9-year-old opponent in the next round, one of her team mates looked over at her and said "you're going to lose." My Grandson said nothing, but his nine-year-old board one team mate looked over at him and smiled. The team took that round with a 4-0 score.

By the way, their winning team consisted of one nine-year-old, two seven-year-olds and a six-year-old playing against other teams of mostly 9-year-olds and 10-year-olds.

Premium Chessgames Member
  patzer2: Back to the game analysis, after 27. Ra3 h4 28. Qxh4 the computers indicate Black's best chance to hold is with 28...f6 (diagram below)

click for larger view

Here White can maintain a clear advantage with 29. Rg3+ Kh8 (diagram below)

click for larger view

30. e5! (diagram below)

click for larger view

forcing Black to give back a piece with 30...Bf5

(others allow White a strong winning attack, as for example after 30... Be8 31. exf6 Rf7 32. Qg5 Bd7 33. Re1 Bf5 (33...Ra8 34. Re7 Rxe7 35. fxe7 ) 34. Qxf5 Qc8 35. Qh5 Qf8 36. Rge3 Nd7 37. Re7 Nxf6 38. Qxf7 Qxf7 39. Rxf7 (+9.59 @ 20 depth, Deep Fritz 15)

31. Bxf5 fxe5 32. Rg5 Nxd5 33. Bxh7 Qxh7 34. Rh5 Rb7 35. Rxh7+ Rxh7 36. Qe4 (+2.04 @ 22 depth, Deep Fritz 15/diagram below)

click for larger view

Here White has a clear advantage, but the win is not as easy as play might continue 36...Nf5 37. Rd1 Rh6 38. Kh2 Rf7 39. Qc6 Rg6 40. Rg1 (+2.29 @ 21 depth, Deep Fritz 15).

P.S.: If I could have calculated or intuitively figured out that after 28. Qxh4 that Black would have to give back a piece and White would have had all the winning chances, I would have pursued it with my human attempt at solving today's Sunday puzzle. Instead of stopping and taking the easy draw by perpetual.

Feb-21-16  dfcx: I did not get it.

An alternative for black is 28...f6 29.e5 Bf5 30.Bxf5 fxe5 31.Rg3+ Kh8 32.Rg5 Rxf5 33.Rxf5 Nxd5 (+1.60 @ 26 depth, Stockfish 6).

click for larger view

Feb-21-16  BOSTER: < patzer2: 24.Nh5 gxh5>.

Black is not obliged to take knight on h5.
He'd play 24...Kg8. If 25. Qh6 f5, if 25. Qd4 gxh5, because white lost a tempo.

Premium Chessgames Member
  patzer2: <dfcx> In your diagram above, after 34. Rd1 what does stockfish 6 give? Fritz at 20 depth is showing a +3.02 evaluation after 34...Qe7 35. Qh6 Nf4 .
Premium Chessgames Member
  patzer2: <BOSTER> After 24. Nh5 Kg8, Deep Fritz 15 finds 25. Nf6+! Kg7 26. Qd4! (diagram below)

click for larger view

with a crushing attack as play might continue 26...Kh6 27. g4 (+14.69 @ 20 depth, Deep Fritz 15).

Premium Chessgames Member
  agb2002: The material is identical.

The first idea that comes to mind is 24.Nh5+ gxh5 (25... Kg8 26.Qh6 gxh6 27.Qg5+ transposes to the main line; 25... Kh8 26.Qd4+ f6 27.Nxf6 and the discovered check wins decisive material) 25.Qg5+ Kh8 26.Qf6+ Kg8 27.Ra3 although I'm not sure whether the threat 28.Rg3# (and e5 when appropriate) and the perpetual option (Qg5+ Kh8 Qf6+, etc.) justify the knight sacrifice since Black has 27... h4 combined with Qd8.

Perhaps, a slower build-up on e5 with Qd4+, f4, Re1, etc. might be better.

Feb-21-16  dfcx: <patzer2: <dfcx> In your diagram above, after 34. Rd1 what does stockfish 6 give? Fritz at 20 depth is showing a +3.02 evaluation after 34...Qe7 35. Qh6 Nf4 .>

Assume you meant 35.Qh5 Nf4 36.Rf7 Nxh5 37.Rxd7 Nf4 38.R1xd6 Rg8, now Stockfish at 22 rates it +3.65

Black is doomed either way.

Premium Chessgames Member
  patzer2: <dcfx> Thanks for the second look. Fritz missed the stronger Stockfish move after < 28...f6 29.e5 Bf5 30.Bxf5 fxe5 31.Rg3+ Kh8 32.Rg5 Rxf5 33.Rxf5 Nxd5 34. Rd1! Qe7> with 35. Qh5! (diagram below).

click for larger view

However, after forcing Stockfish's 35. Qh5!, Deep Fritz 15 found the winning continuation 35...Nf4 36. Rf7 Nxh5 37. Rxe7 Ng7 38. g4 (+2.33 @ 21 depth) when play might continue 38...Ne8 39. Kf1 Rc8 40. Ke2 h5 41. Rd5 hxg4 42. hxg4 Rb8 43. g5 Ng7 44. Kd1 Nf5 45. Rf7 Nd4 46. Rxd6 Ra8 47. Rdd7 Nc6 48. Rb7 Rd8+ 49. Kc1 (+3.92 @ 24 depth, Deep Fritz 15).

Feb-21-16  vajeer: Many have pointed 28...f6 as possible improvement for Black. I'm just curious what is the refutation for 28...f5. It helps keep the b1-h7 diagonal closed.
Feb-21-16  stst: Numerous lines of defense. Among the many variations, the N-sac seems viable: 24.Nh5+ gxh5
25.Qg5+ Kh8
26.Qf6+ Kg8
27.e5 Qd8
28.Qh6 f5
29.exf6 e.p. Rf7
30.Ra3 h4 (or c3 to delay one moment)
31.Qxh4 Qf8
32.Rg3+ Kh8
33.Bg6 Be8
34.BxR BxB
35.Rg7 QxR (else h7 not guarded, Qxh7#)
36.fxQ+ Kxg7

and Black without the Q will have very hard time defending....

Too many others, see how the game proceeds...

Feb-21-16  stst: Identical in the first several moves, pretty much the same it basically, but Black manages to exchange Q is a little surprise.... yeah the game invokes analyses of quite many variations.
Premium Chessgames Member
  patzer2: <vajeer> If 28...f5, then Deep Fritz 15 indicates 29. Rg3+ (+21.08 @ 19 depth) wins easy.
Feb-26-16  Moszkowski012273: I would bet those finding this easy haven't looked at 28...f6 29.e5,Bf5

It's quite easy to go astray.

Feb-26-16  Zaiyetz: This looks like a line out of the Benoni.
Premium Chessgames Member
  perfidious: <Zaiyetz: This looks like a line out of the Benoni.>

It is: 1.d4 Nf6 2.c4 c5 3.d5 e6 4.Nc3 exd5 5.cxd5 d6 6.e4 g6 7.Bd3 Bg7 8.Nge2 0-0 9.0-0 is a line which became popular in the sixties after J Penrose vs Tal, 1960 and K S Ojanen vs Keres, 1960 claimed two greats.

Opening Explorer

Premium Chessgames Member
  PawnSac: < patzer2: Got as far as 24. Nh5! gxh5 25. Qg56+ Kh8 26. Qf6+ Kg8 27. Ra3 in playing guess-the-move with today's Sunday puzzle. Figured I had no worse than a draw by perpetual against a GM, so why not give it a shot. Over the board against a GM, I'd have taken the perpetual in a heart beat after 27...h4 with 28. Qg5+ Kh8 29. Qf6+ = etc. >

Yes I understand the sentiment, but as Bobby Fischer used to say.. Play the POSITION not the player. Here's how I approach this kind of position, and maybe it will help some players stretch thier potential in future games and/or puzzles:

< AFTER 23...Bd7 >

click for larger view

Possibly better was ..f6 to keep the Q out of g5. In any event, Qc3+ f6 gets nowhere for white, so the Nh5+ sac certainly appears the clearest way to get at the black king. Not Nf5+ because of the possibility ..Bxf5 keeping the king shielded. Now, from THIS position, one has to < imagine > the following position..

<diagram 2>

click for larger view

This is an obvious guaranteed perpetual with Qf6-g5-f6 if white wants it, BUT white should look for more. With this position in the mind's eye, then ask the question, what can white do to increase the pressure. How can he bring more forces into play. Can, and if so, how does white bring all his forces to bear down on the black king?

Well, there's the obvious rook lift Ra3 mate threat. There's the line clearance move e4-e5 so the B targets h7/g6. How bout the other rook? If the bishop unloads on black's king position the Rc1 can move to c3. Anything else? There's f2-f4 which pressures the center, and also suggests the possibility of Rc1-f1, or e1, and so forth. So white has good potential follow up. So what comes first? the Ra3 mate threat is the most forcing. How can black defend? It appears h5-h4 is the only defense! Our line thus far is Nh5+ gx Qg5+ Kh8 Qf6+ (necessary to put the K back on g8 to keep the rook off the open file) Ra3 h4 and now what? White must envision the following:

<diagram 3>

click for larger view

This is decision time. The two obvious candidate moves to continue the attack are Qxh4 renewing the threat Rg3+, or e4-e5 opening the diagonal for the bishop. But we also still have the repetition possibility Qg5-f6-g5+. So, at this point, most strong players will become very pragmatic and think, "OK i have the guaranteed draw at least up to blacks h5-h4, so I can blitz out the moves to there, where i can analyze more clearly from that point." Now depending on time, I would REVIEW as follows.. "i have a perpetual but very possibly more with Nh5+, let's take one last look. Are there any other promising alternatives to Nh5? Black can challenge the A file, and the immediate f4 doesn't feel strong enough. Nope, we're going with Nh5+"

So in this fashion white can have a good think on his 24th, then blitz the moves to his 28th, then have another good think, while managing his time over the board. When analyzing this game, I only had to look 4 moves deep to make a sensible <practical> decision. It was not necessary to go deeper to make a winning choice. Most of the time you do not have to see all the way to the end of an attack. The deeper you force yourself to go, the greater the chance of "overlooking" something. Now in an ending, it's no big deal to calculate 10-12 moves in simplified positions because we're often just counting squares.

When you watch the live games, especially with GM commentary, you can clearly see that top players don't analyze every move. The don't speak a word, they speak a phrase or whole sentence, then ponder the next statement. Try it yourself!

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