Showing posts with label Tisdall. Show all posts
Showing posts with label Tisdall. Show all posts

Thursday, February 28, 2008

Norwegian Variation Sources

From Norwegian chess enthusiast, chess author and chess shop owner (Sjakkbutikken) Øystein Brekke, I recently received two very interesting sets of photo copies. The most recent one is from the Swedish chess magazine "Tidsskrift för Schack" 1964 with the heading "En ovanlig variant i spanskt parti" (An Unusual Variation in the Spanish Game). It was written by the late Svein Johannessen and is a five part article on the Norwegian variation in the Ruy Lopez.

Even more ancient is the second set of photo copies which is from "Deutsche Schachzeitung" 1901 with the heading "Eine neue Vertheidingung der spanische Partie" (A New Defence in the Spanish Game). This set consists of an article by editor Carl Schlechter (February issue), a summary of some readers' letters regarding the variation 6.Bxf7+ (June issue) and finally a second article by Schlechter focusing on the 6.Bxf7+ variation (September).

This new information obviously calls for an update of my list of Norwegian variation sources:

The Norwegian Variation Bibliography
Below is a list of the significant sources that I am aware of. I will update it whenever I find the time or stumble over anything new.

Alternative names:
English: Wing variation, Taimanov variation, Furman variation
German: Jagdvariante
NIC-code: RL 9.3
ECO-code: C70

Major sources:

  • New In Chess Yearbook 37 (1995):
    (25 pages article by Jonathan Tisdall)
  • Norsk Sjakkblad 1993 and 1994 (Norwegian language):
    7 articles by Jonathan Tisdall (drafted by Sverre Johnsen): 2/93; 3/93; 4/93; 5/93; 1/94; 2/94; 6/94 and 7/94. There is also an annotated game Ernst-Tisdall, Gausdal 2002 (Zwaig variation) in 1/93.
  • Sjakkmesteren Svein Johannessen, Brekke, Norsk Sjakkforlag 2009 (Norwegian language). Contains many annotated games - some previously unknown - and an overview chapter.
  • Opening for White according to Anand 1.e4 (vol.2); Khalifman, Chess Stars 2003
    (I don't have the book available but have read it and as expected it offered a serious try for White to extract a genuine advantage)
  • Chesspublishing 1.e4 e5; Davies, February 2003
    (mainly for subscribers)
  • Play the Ruy Lopez; Greet, Everyman 2006
    (13 well researched pages from White's point of view).
Minor sources:

  • Easy Guide to the Ruy Lopez; Emms Everyman 1999
    (quite good coverage but mainly from White's perspective)
  • The Lopez Grip Part 3; Martin, Bits and Pieces (Chessville) 2004
  • Norsk Sjakkblad #4 and #5 2005 (Norwegian language)
  • Older issues of Norsk Sjakkblad (I will eventually try to make a list of the relevant issues).
Historic sources:

  • Tidsskrift för Schack 1964 #7, 8 and 9; Svein Johannessen (Swedish language)
  • Deutsche Schachzeitung 1901 #2, 6 and 9; Carl Schlechter (German language)

General sources:
The encyclopedic works (ECO, NCO, MCO, BCO2 etc.) almost by definition have some coverage of the line. I will add some details on this whenever I find the time.

  • ECO C (4th edition) has 1,5 pages
  • NCO has 0,5 pages

This is an updated version of an entry I originally posted August 30th, 2007. Some information added August 26th, 2009)

Sunday, September 9, 2007

The Zwaig Variation II

There are indications that the critical line in Zwaig's variation (1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 b5 5.Bb3 Na5 6.0–0 d6 7.d4 f6) may be 8.Bxg8 Rxg8 9.b4!?. Tisdall describes this move as 'too ugly to be true'. But although I cannot claim to understand why, it has been the choice of some of the best prepared players ever to face 7...f6.

9...Nc4 (Dia)

10.Nbd2 Nxd2

10...Nb6!? has been played by a correspondence World Champion and should be taken seriously: 11.Qe2 Be6 12.Rd1 c6 13.dxe5 dxe5 14.Nc4 Nd7 (14...Qc7 15.Nxb6 Qxb6 16.a3 c5 +=) 15.Nd6+ Bxd6 16.Rxd6 Bc4 17.Qe3 (17.Qd1 Qc7 18.Be3 Nf8 19.a4 may be even stronger) 17...Qc7 18.Rd1 a5 19.Nd2 Be6 20.bxa5 Rxa5?! (20...Kf7! Oim; 20...Qxa5) 21.Qe2 Ke7 22.Nb3 Ra4 23.Be3 += Stern-Oim, corr 1994.

11.Qxd2

11.Bxd2 c6 (11...c5 12.c3 Bg4 13.Re1) 12.c3 Be6 13.Be3 Be7 14.Nd2 (14.a4) 14...a5 15.Qc2 g5?! (15...axb4 16.cxb4 Qd7 17.Nb3 +=) 16.a4 Qb8 17.axb5 Qxb5 18.c4 +- Helmers-O.Moen, Norway 1975.

11...Bb7 12.Re1 Qd7

12...a5 is probably weaker: 13.bxa5 c5 14.dxc5 dxc5 15.Qe2 Qxa5 16.Nxe5 0–0–0 (also 16...fxe5 17.Qh5+ g6 18.Qxe5+ Kf7 19.Rd1 is clearly better for White) 17.Nf3 Bd6 18.Bb2 and White's advantage was beyond doubt in T.Ernst-Gausel, Ostersund 1992.

13.Bb2 Be7

Tisdall suggests that 13...0-0-0 is worth consideration.

14.a4 f5 15.axb5 fxe4 16.bxa6

An interesting computer-aided line goes 16.Ng5 Qg4 17.bxa6 Rxa6 18.Rxa6 Qxg2+ 19.Kxg2 e3+ 20.Nf3 exd2 21.Rea1 Bxa6 22.Nxd2 Bb7+ 23.f3 Kd7 24.dxe5 dxe5 with equality.

16...Rxa6! 17.Ng5

17.Rxa6 is met by 17...exf3! planning ...Qg4 with a mating attack.

17...Rxa1 18.Bxa1?

18.Rxa1 Qg4 19.Nh3 Qxg2+ 20.Kxg2 e3+ 21.Kg3 exd2 22.dxe5 h5 23.f4 dxe5 24.Bxe5 g5 –+.

18...Qg4

Black is close to winning already. White has nothing to oppose the light-squared bishop.

19.Nh3 (Dia)

19...Qxg2+!

A nice demonstration of the power of Black's light-square play.

20.Kxg2 e3+ 21.Kg1?!

21.Kf1 may be slightly better but after 21...exd2 22.Rd1 e4 23.Rxd2 d5 White has no satisfactory reply.

21...exd2 22.Rd1 g5 23.dxe5 g4 24.Nf4 Bg5 25.Ne2 Be4 26.exd6 Bxc2 27.dxc7 Kd7 0–1 T.Ernst-Tisdall, Gausdal 1993.