Showing posts with label RAM. Show all posts
Showing posts with label RAM. Show all posts

Tuesday, June 23, 2009

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?

Monday, June 15, 2009

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.

Friday, May 29, 2009

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:


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