The Stonewall Reviewed

Another Stonewall review in German is available at Freechess.Info. This review too is very positive. However, curiously it seems more enthusiastic about the Stonewall Defence than about the book. Well, as a matter of fact choosing a fitting subject IS an important part of writing a good book and the Stonewall has a lot of good qualities.

As this still is an English language blog I will attempt another translation (Red = German; Green = English):

Der Stonewall ist schon eine fabelhafte Eröffnung!

Als Nachziehender baut man sich mittels der immer gleichen Anfangszüge c6, d5, e6, f5 nebst Sf6 auf. Anschließend noch flugs den Läufer auf d6 manövriert, kurze Rochade und ab geht die Luzi (wie zum Beispiel in der Partie GLÜCKSBERG - M. NAJDORF Warschau 1935: 1.d4 f5 2.c4 Sf6 3.Sc3 e6 4.Sf3 d5 5.e3 c6 6.Ld3 Ld6 7.0-0 0-0 8.Se2? Sbd7 9.Sg5? L:h2+ 10.Kh1 Sg4 11.f4 De8 12.g3 Dh5 13.Kg2 Lg1 14.S:g1 Dh2+ 15.Kf3 e5! 16.d:e5 Sd:e5+ 17.f:e5 S:e5+ 18.Kf4 Sg6+ 19.Kf3 f4 20.e:f4 Lg4+ 21.K:g4 Se5+ 22.f:e5 h5 0-1 ).

The Stonewall is a marvellous opening!

Black always sets up the same formation: c6, d5, e6, f5 and Nf6. Then the bishop goes to d6, short castling and the party can begin (as for instance the game Glücksberg-Najdorf, Warsaw 1935).

Damit die Anwendung des Stonewalls in der Praxis nicht wie das Hornberger Schießen ausgeht (1564 kündigte der Herzog von Württemberg seinen Besuch in Hornberg an. Ein Wächter sollte den Gast per Hornsignal voranmelden, damit man zur Begrüßung Böller- und Kanonendonner abfeuern konnte. Zweimal gab er jedoch falschen Alarm. Als der hohe Gast dann wirklich kam, hatten die Hornberger buchstäblich "ihr Pulver verschossen", und so begrüßten sie den Herzog mit einem lauten "Piff-paff" aus tausend Männerkehlen.) haben Sverre Johnson (sic.), Ivar Bern und Simen Adgestein (sic.) das vor mir liegende Buch geschrieben. Es befasst sich aus der Sicht des Schwarzen mit dieser Eröffnung, die bereits Botwinnik regelmäßig anzuwenden pflegte und die im Repertoire führender Großmeister (Short, Dreev, Moskalenko) zu finden ist.

In order to save Stonewall players from "Hornberger shooting" Sverre Johnsen, Ivar Bern and Simen Agdestein have written the book in front of me. It examins from Black's viewpoint this opening which already Botwinnik played regularly and which is in the repertoire of leading contemporary grandmasters like Short, Dreev and Moskalenko.

In 12 Kapiteln und mehr als 60 ausgewählten Musterpartien + zusätzlicher theoretischer Übersichten führen die Autoren den Leser an eine leicht zu erlernende Eröffnung heran. In der Tat ist die schwarze Strategie entwaffnend einfach als auch brandgefährlich! In jedem Kapitel gibt es mehrere kommentierte Partien die auf Besonderheiten und wichtige Haupt- und Nebenvarianten hinweisen.

The authors introduce the reader to an easy-to-learn opening in 12 chapters and more than 60 selected Illustrative games and additional theoretical overviews. Black's strategy is actually as simple as it's dangerous! In every chapter there are several annotated games which point out important features as well as main- and sub-variations.

Geschriebenes Wort und Analyse sind wohltuend ausgewogen und strapazieren den Leser nicht unnötig mit ellenlangen Variantenverästelungen. Neueste Entwicklungen wurden genauso berücksichtigt wie vergleichbare Publikationen, ebenso wurden die angefertigten Analysen sorgfältig geprüft und von diversen Engines „abgesegnet“. Im Grunde genommen ist dieses Buch ein komplettes Schwarzrepertoire gegen alles außer 1.e4, die Autoren geben Empfehlungen gegen 1.d4, 1.c4, 1.Sf3 und 1.b3/1.g3.

The prose as well as the analysis are comfortingly well considered and don't bother the reader unnecessarily with overly long variations. Recent developments are taken into account as well as comparable publications. The resulting variations are carefully tested and checked by various computer engines. The authors give recommendations against 1.d4, 1.c4, 1.Nf3 and 1.b3/1.g3 so in reality this is a complete black repertoire for everything except 1.e4.

Für wen ist das Buch zu empfehlen?
- Für Spieler mit wenig Zeit für das Eröffnungsstudium da im Stonewall das Wissen um Pläne und Strategien wichtiger ist als einzelne Züge.
- Für Spieler, die mit Schwarz um die Initiative kämpfen wollen ohne unnötige Risiken einzugehen.
- Für Spieler, die schon lange auf der Suche nach einem vernünftigen Schwarzrepertoire gegen alles außer 1.e4 sind.
Wie gesagt, der Stonewall ist eine fabelhafte Eröffnung.
Das Buch ist übrigens auch fabelhaft und deswegen ein Daumen hoch von meiner Seite!

For who can this book be recommended?
- For players with little time for opening preparation as in the Stonewall understanding of plans and strategies is more important than single moves.
- For playes who like to seize the initiative with Black without taking unnecessary risks.
- For players who for a long time have been looking for an opening against everything except 1.e4.
As already said: The Stonewall is a marvellous opening.
The book is incidentally also marvellous and I give it thumbs up!

I hope this translation is not too far off the mark. The text contains some idioms that are unfamiliar to me and help from the readers would be appreciated!

First Stonewall Review

I was expecting John Elburg to be first before British Chess Magazine. But it turned out that Deutscher Fernschachbund (BdF) - the German Correspondence Chess Federation was the first to deliver a regular review of our Stonewall book. The reviewer is very positive (even though he has some reservations regarding the subject. As it's in German here is an attempt to translate (Red = German, Green = English):

Schachbücher aus der Feder von Fernschachspielern sind rar. Dies gilt besonders, wenn der Autor zu den besten in der Welt zählen soll. So ist bei "Win with the Stonewall Dutch" beim Namen der Verfasser ein erstes Ausrufezeichen zu setzen, denn Co-Autor ist Ivar Bern, 17. Fernschach-Weltmeister. Mitverfasser ist Sverre Johnsen, Simen Agdestein hat ebenfalls beigetragen. Die hochgesteckte Erwartung in die Qualität des Werkes, besonders in seine Akkuratesse, wird dann aber beim Lesen des Rückentextes auf die Probe gestellt. Man hat es tatsächlich geschafft, den Namen Ivar Berns in Ivan Bern zu verstümmeln.

Chess books from the pen of correspondence chess players are rare. This is in particular so if the author is among the best in the world. This is the case with " Win with the Stonewall Dutch". The names of the authors earn a first exclamation mark, because the 17. correspondence chess world champion - Ivar Bern is a co-author. The other co-author is Sverre Johnsen and Simen Agdestein has likewise contributed. However, the high expectations to the quality of the work - in particular its accuracy - are challenged when reading the back text of the book which succeds in mutilating the name Ivar Bern into Ivan Bern.

Das Material zum holländischen Stonewall aber wird dann sehr solide dargestellt. 64 Partien, fünf davon vom Ex-Weltmeister selbst gespielt (+4, -0, =1). Mit den zwei weiteren Fernschachpartien beträgt deren Anteil insgesamt mehr als zehn Prozent.

The material on the Dutch Stonewall, however, is presented very solidly. Out of 64 games, five are by the Ex-World Champion (+4, -0, =1). Together with two further correspondence games this category altogether totals more than ten per cent.

Der Aufbau der insgesamt 12 Kapitel mutet etwas ungewöhnlich an. Den Anfang macht eine ultra-kurze Übersicht ("Lesson Overview") zum jeweiligen Thema. Dieser folgen mehrere ausführlich kommentierte Partien. Auffälig an diesen Partien ist, dass die Autoren so etwas wie ein FAQ-System eingearbeitet haben. So wie man es von derartigen Systemen kennt, erscheint im Text ein "Q" (für "Question", = Frage) und eine Fragestellung aus der Warte des Lesers, beides kursiv gedruckt. Mal geht es dabei um allgemeine Dinge zum System, dann um spezifische Stellungsfragen und dann wieder um Pläne, Einschätzungen etc. Die Antwort wird jeweils unmittelbar gegeben. Den Partien sowie der diesen nachgestellten Zusammenfassung der aus ihnen abzuleitenden Erkenntnisse schließt sich eine dem Leser gestellte Übung an. Nun erst, das Kapitel abschließend, wird die Theorie in allgemeiner Form dargestellt.

Die Kapitel haben folgende Inhalte:

The structure of the altogether 12 chapters is somewhat unfamiliar. An ultra short overview ("Lesson Overview") introduces the respective topics. These are followed by several games annotated in detail. What is peculiar is that in these games the authors have included something reminding of a FAQ system. As you may recognize from similar systems there appears in the text a "Q" (="Question") and then the reader's question, both in italics. Sometimes the question concerns the system in general, at other places specific position or plans, evaluations etc. In each case the answer is directly given. To the games and their summaries there is added exercises for the reader. Only then, closing the chapter, the theory in general form is offered.

The chapters have the following contents:

1. 7. b3: Einführung
2. Das kritische 7. b3 De7 8. Se5!
3. 7. Dc2, 7. Sc3 und seltene 7. Züge
4. 7. Lf4
5. Abspiele mit einem verspäteten Lf4
6. Frühe Abweichungen
7. 4. c4 mit Sh3
8. 2. c4: Abspiele ohne Fianchetto
9. 2. Sf3: Abspiele ohne Fianchetto
10. 2. Sc3 und 2. Lg5
11. Staunton-Gambit und seltene zweite Züge
12. 1. c4, 1. Sf3 und 1. g3.

{translation of the Table of Content}

Den Abschluss des Werkes bilden die Lösungen auf die Übungen in den einzelnen Kapiteln, ein Varianten- und ein Spielerverzeichnis.

The book concludes with the solution to the exercizes from the previous chapters and indexes of variations and players.

Die abschließende Einschätzung des Rezensenten zum Werk soll in dessen eigenen FAQ-Stil erfolgen: F: Sind Sie der Ansicht, dass dieses Buch zum Kauf empfohlen werden kann? Ja, dieser Ansicht bin ich. Es gibt einen umfassenden Überblick über den holländischen Stonewall und zeichnet sich durch einen genügenden Tiefgang aus. Wenn der Partieerfolg des Lesers ausbleiben sollte, wird dies an dessen eigenen Fehlern und vielleicht auch dem nicht ganz gesunden Eröffnungssystem liegen, nicht aber an "Win with the Stonewall Dutch".

The reviewer's concluding evaluation of the work will be in the FAQ style:
Q: Is it your opinion that this book can be recommended to buy?

Yes, this is my opinion. The book offers a comprehensive overview over the Dutch Stonewall and is also sufficiently deep. If the reader isn't happy with his results, he must blame his own mistakes or a opening system that may not be completely sound, but not, " Win with the Stonewall Dutch".

I am not entirely happy with this translation so quite likely I will try to improve it one of the first days.

Repertoire Choices and Consistency

Sometimes interesting thoughts and debates deserving to be read 'get hidden' in the comments to old entries. In this blog entry one anonymous reader (it's hard to say how many of the 'Anonymous' are the same poster) is generally very positive to our book. However, he points out a missing move-order option and some related challenges.

Dealing with transpositional options is an eternal challenge for repertoire books. A good repertoire may well be inconsistent if you in a certain position have a choice between a move X that will lead to a position you have to face anyway (by transposition) and a move Y which may be better but takes some effort to analyse. Going for move X is rational as it saves you some labour but in chess your first priority should be to play the best move.

Whether you should go for the independent option (Y) or not, must depend on at least three factors:

• How satisfied are you with the positions resulting from move X?


• How much better can move Y really be?


• How complicated are the variations following move Y?

Anonymous' main point occurs after the first moves of the mainline 1.d4 f5 2.g3 Nf6 3.Bg2 e6 4.Nf3 d5 5.0-0 Bd6 6.c4 c6: (Dia)


Here we mention 7.b3 Qe7 and now:
- 8.Bb2 (when play may continue 8...b6 9.Ne5) and
- 8.Ne5 (when 8...0-0 9.Bb2 b6 is a possibility).

However, there also is a related possibility:

- 7.Ne5 0-0 8.b3!? (when 8...Qe7 9.Bb2 b6 transposes to the lines above).

We agree that this is a natural move, and although it is very rare and not tested in high-level encounters, it deserved a mention. An author should not only look at what has been played by strong players but also scan the position for other 'normal looking moves', trying to foresee what his readers may wonder at.

The anonymous reader concludes that in order to have a consistent repertoire against all of White's various combinations of b3 and Ne5, it's necessary to play ...b6 lines against all of them. I disagree with that conclusion. A completely ...b6 based solution is certainly possible, and fully recommended if you trust your analysis after 7.b3 Qe7 8.Ne5 0-0 9.Bb2 b6!? 10.cxd5 exd5. However, this line is based on untested analysis and it's also possible to meet each of the three lines with a specific reply, even if only one of them involves an early ...b6:
a) 7.b3 Qe7 8.Bb2 b6 9.Ne5 Bb7! which has for a long time been considered fine for Black.
b) 7.b3 Qe7 8.Ne5 0-0 9.Bb2 Nbd7!? planning ...a5 (as Moskalenko does).
c) 7.Ne5 0-0 8.b3 Nbd7(!), securing an edge in development and planning ...dxc4 followed ...e5.

As a matter of fact, even if I am tempted to go for the ...b6 solutions, against line c) I would seriously consider 8...Nbd7 as it seems strategically simpler.

Lessons to be learned

• Being 'too consistent' - trying to transpose whenever possible - may cost you some advantageous options.


• Transpositions rarely are just transpositions; normally there is a trade of options. You stop some options and allow others.

Noteboom RAM

For several reasons (which I may disclose later) I have become interested in the Noteboom variation. The variation can occur from several move-orders but one of the more common is 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 dxc4 5.a4 Bb4 6.e3 b5 7.Bd2 a5 8.axb5 Bxc3 9.Bxc3 cxb5 10.b3 Bb7 11.bxc4 b4: (Dia)

The position is extremely unbalanced and it looks like a position where a lot of RAM will be very useful. I suspect that objectively White is at least somwhat better. But in order to make use of his chances he must know what he is doing. Black scores very well in my database - probably because in most games he is the more experienced Noteboom player.

I am no expert on the line but would like to collect some essential games and annotate them on this blog. My annotations will mainly be based on van der Vorm and van der Werf's out-of-print monograph and Rybka's output.

Some candidate games so far are:

• Kasparov-Tyomkin, Tel Aviv (sim) 1994 and
• Oei-Van Wissen, Leeuwarden open 1993, illustrating White’s attacking possibilities supported by his huge pawn centre.
• Lin Weiguo-Stangl, Beijing 1995, illustrating the power of Black’s connected queenside passers.
• Thieme-Van der Worm, Leidschendam 1994, showing why White should be careful meeting ...e5 with dxe5.

Could any readers help me with more (or better) candidate games - in particular recent ones with at least one strong player involved?

The Stonewall Has Reached Norway

Finally I got my hands on a physical copy of 'Win With the Stonewall Dutch'!

It arrived in the mail today together with 12 other copies and looked exactly as well as I had hoped. Wolff Morrow's artwork on the cover adds considerably to the first impression. There's a tournament in my club so it didn't take me long to get rid of most of the copies. Now I have one for my own library and one for my mother's collection.

I have not yet had the time to check with our correction list but it seems that almost all of our last minute additions made it to the print files. Thanks to editor Graham Burgess and type-setter Petra Nunn!

I was not so happy to spot 3 typos. Fortunately they were all fairly minor and none of them will confuse the reader or influence his repertoire or understanding in any way. I have an agreement with Gambit not to publish any updates or corrections to the book so I will not disclose them now. However, one of them is quite annoying so I will ask the publishers to correct it in an entry here (in a suitable context). One of the typos was missed by all proof reading eyes. Another I believe made it to the printer outside the normal proof-reading process. The third and most annoying one probably crept into the book as a result of the proof-reading/final checking.

More Stonewall RAM

The Maroczy-Tartakower game was excluded from our Stonewall book mainly because it didn't really match our recommended repertoire. Today's game might have made it had it been in the databases (or had my memory been a bit more consistent). I only remembered it when annotating Tartakower's brilliancy. The reason it is missing in BigBase/MegaBase may be that the game information is unreliable. Different sources offer different years and different spellings for White's name. As for tournament/event I have no idea.

Glinksberg - Najdorf

Warsaw 1928

1.d4 f5 2.c4 Nf6 3.Nc3 e6 4.Nf3 d5?!

4...Bb4 is fine for Black.

5.e3

As mentioned elsewhere 5.Bf4 is very good for White.

5...c6

Black can more safely reach this position from the move-order 4.e3 d5 5.Nf3 c6.

6.Bd3 Bd6 7.0–0 0–0 (Dia)

This position is fairly attractive for Black who has won a number of short games.

8.Ne2!?

This move has been criticized but probably wrongly so as Beliavsky has played it recently. Our book only mentions 8.b3 and 8.Qc2. Another option is 8.Ne5, planning the stodgy counter-Stonewall with 9.f4.

8...Nbd7

A more recent game went 8...Ne4 9.Ne1 b6 10.f3 Nf6 11.cxd5 cxd5 12.Bd2 Qd7 13.Rc1 Ba6 14.Qb3 Rc8 15.Rxc8+ Qxc8 16.Bb4 Bc4 17.Qa3 Bxb4 18.Qxb4 Nc6 and Black was fine in Beliavsky-Vydeslaver, Kallithea 2008. It is symptomatic that Beliavsky couldn't win against his presumably weaker opponent.

9.Ng5? Bxh2+!

This isn't quite as simple as it seems. Black must have calculated quite far or trusted that the neccessary resources would present themselves as play developed.

10.Kh1

The obvious point was 10.Kxh2? Ng4+ and Black wins an important pawn. Now he threatens to trap the bishop with g3 as well as Nxe6.

10...Ng4 11.f4 Qe8 12.g3 Qh5 13.Kg2 (Dia)

White is now ready to pick up the bishop with moves like Nf3 and Rh1.

13...Bg1! 14.Nxg1

Any other capture loses immediately.

14...Qh2+ 15.Kf3 e5!

This is the key to Black's combination. The threat is ...e4 so White has no choice.

16.dxe5 Ndxe5+!

Remarkably Black succeeds in sacrificing all his minor pieces in this game which has been called 'The Polish Evergreen' (or Immortal or something like it).

17.fxe5 Nxe5+ 18.Kf4 Ng6+ 19.Kf3 (Dia)

In early calculations it may have been reassuring for Black to have a draw as a back-up. But does he actually have anything more than a repetition?

19...f4!

This obviously lets the light-squared bishop into the game. What's less obvious is that the rook too joins the attack.

20.exf4 Bg4+! 21.Kxg4 Ne5+! 22.fxe5 h5# 1–0

Lesson to be Learned:

Never underestimate Black's light-squared bishop in the Stonewall.

Another Stonewall Extract

I am scanning the web for reviews of our new Stonewall book. So far I have found nothing, and I don't really expect anything resembling a review for a couple of weeks yet. Nevertheless there turned up something interesting.

For some weeks now, Gambit has offered a pdf extract from 'Win with the Stonewall Dutch'. Today I noticed that Niggemann offers another extract from the book. I have not figured out how to link directly to the relevant page but if you go to their homepage, then choose Online-Shop and Neuigkeiten, scroll down to the Stonewall book, click it and then choose 'Katalog', you will find my entire Preface. The text is a bit confusing as there are first two paragraphs from the publisher's blurb and then my text starts without any heading or explanation. The extract from the Preface starts with the sentence: 'I have for a long time been fascinated and mystified by the Stonewall Dutch'.

A Silly Little Move

From time to time I add another small chapter to my Veresov manuscript. Whether it will ever become a chess book I have no idea. One deciding factor will be the analytical conclusion of some critical lines. However, occasionally I start looking at moves that really don't belong in a serious chess book. That's when I turn to this blog.

A couple of days ago I started looking at 1.d4 Nf6 2.Nc3 d5 3.Bg5 Nbd7 4.a3?!. (Dia)
The reason I even noticed the possibility was Giddins' very readable 'How to Build Your Chess Opening Repertoire' in which he mentions the line 4.f4!? e6 5.a3!?, a speciality of British correspondence expert A.M. Steward.

4.a3 appears a silly move but after 4...c5 5.dxc5 it’s not at all clear that Black can win his pawn back. The position arising after 4...e6 5.e4 (5.f4 transposes to Steward's line) 5...dxe4 6.Nxe4 Be7 7.Nxf6+ Bxf6 8.Bxf6 Qxf6 (Dia) must be worse for White than similar French lines (Burn and Rubinstein) but may still be somewhat easier to play for White:

a) 9.Qd2 c5 10.Nf3 0–0 11.0–0–0 cxd4 12.Qxd4 Qxd4 13.Rxd4 += Schinzel-Pinkas, Bydgoszcz 1976.
b) 9.Nf3 0–0 10.Qe2 (10.Be2 e5! is at least equal for Black) 10...c5 11.0–0–0 cxd4 12.Rxd4 e5 13.Rd2 Re8 14.Qe3 a6 15.Be2 Qe7 16.Bc4 h6 17.Re1 += Schweber-Quinteros, Villa Martelli 1996.

Whether you find such positions attractive or not is to some extent a matter of taste. From a practical viewpoint it must be taken into account that some black players may dislike them. Quite possibly Black must look into the untested 4...c6 or 4...h6 if he is looking for a more interesting path to equality.

Rubbish? I honestly don't know, but now I can with a clear conscience exclude these lines from my manuscript!

Another Step Forward

Today I noticed that 'Win with the Stonewall Dutch' has been promoted from 'Forthcoming Books' to 'New Gambit Chess Books'. There is no more information about distribution in Europe and the US, but I assume that will be added soon.

I really look forward to holding it my hands. Not only because I love books - and my own in particular - but also because I am curious how much of our last minute additions actually made it into the book.

Stonewall RAM

What makes a strong player, and how can you best improve your playing strength?

Opinions vary and there obviously are more than one ingredient. However, most authorities agree that one essential requirement is to understand a certain number of positions and games really well. This is the main message of two interesting books:

• Chess Training Pocket Book, Alburt
• GM-RAM: Essential Grandmaster Chess Knowledge, Ziyatdinov

It goes without saying that knowing a certain number of games related to your opening repertoire is a particularly important part of your chess education. This obviously is one of the ideas behind the 'Illustrative Games' concept which dominates modern opening books.

'Win with the Stonewall Dutch' offers 64 illustrative games which are all quite close to the book's recommended repertoire for Black. However, there of course are many other games containing useful Stonewall ideas which don't quite fit into our recommended repertoire.
Among the 59 games listed in Ziyatdinov's book there is a Stonewall game that didn't make it to our Stonewall book but deserves to be studied. Myself I first saw it in Reti's 'Die Meisters des Schachbretts':

Maroczy - Tartakower, Teplitz Schoenau 1922
1.d4 e6 2.c4 f5 3.Nc3 Nf6 4.a3?!
This is a little too slow. Black will not play ...Bb4 as long as White can meet it with e3 and Nge2.
4...Be7
Our Stonewall book concentrates on lines with ...Bd6 rather than ...Be7.
5.e3
The Dutch is normally more attractive for Black when White avoids the g3 systems - partly because he can more easily develop his queenside but also because White's kingside tends to be more vulnerable.
5...0–0 6.Bd3 d5
The Stonewall formation. Also development with ...b6 is quite attractive against early e3 lines.
7.Nf3 c6
This too generally is a part of the Stonewall set-up. In this position it may not be strictly necessary but Black is preparing to redeploy his bishop to d6.
8.0–0 Ne4
This is a part of the ancient attacking plan formerly associated with the Stonewall. Black starts attacking on the kingside with a knight, a bishop, two major pieces and possibly a couple of pawns while his queenside is left dormant.
9.Qc2 Bd6
This is the best position for Black's dark-squared bishop once White's exchanging options Bf4 or Ba3 have been eliminated. The loss of a tempo has little significance because of White's slow mobilization.
10.b3 Nd7 11.Bb2 (Dia)
This is a fairly typical Stonewall position with e3 rather than g3.
11...Rf6
This is the old-fashioned Stonewall attack. Black goes directly for the king, leaving his queenside pieces undeveloped.
12.Rfe1 Rh6 13.g3 Qf6 14.Bf1 g5
The g-pawn is an important attacking unit. The weaknesses left behind are not important if Black can just keep his initiative going.
15.Rad1 g4 16.Nxe4 fxe4 17.Nd2 (Dia)
If White can only find the time to play Bg2 and Nf1 his kingside will be quite safe and he will be ready to attack the queenside.
17...Rxh2!?
If Black had been better mobilized this would have been a standard sacrifice, hardly worth a diagram.
18.Kxh2 Qxf2+ 19.Kh1
Black now has no forcing follow up to his rook sacrifice. What makes the game remarkable is how he now quietly goes on completing his queenside development. White is free to reorganize his defence but seems unable to find a satisfactory plan. It would have been interesting to see what a Karpov or Petrosian would have come up with but Rybka's evaluation of '=+ (-0.44)' may well be correct (and in any case indicates that modern software is capable of appreciating positional compensation).
19...Nf6
19...Qxg3 20.Re2 Nf6 transposes.
20.Re2 Qxg3 21.Nb1 Nh5 22.Qd2 Bd7 23.Rf2 Qh4+ 24.Kg1 Bg3 (Dia)
Finally it seems clear that Black must have more than compensation for his material investment.
25.Bc3
Rybka gives 25.Rg2 Rf8 26.Nc3 Rf3 27.Bc1 Ng7 =+.
25...Bxf2+ 26.Qxf2 g3 27.Qg2 Rf8
Black has got his material back without giving up his attack. White is lost.
28.Be1 Rxf1+ 29.Kxf1 e5 30.Kg1 Bg4 31.Bxg3 Nxg3 32.Re1 Nf5 33.Qf2 Qg5 34.dxe5 Bf3+ 35.Kf1 Ng3+ 0–1