Grünfeld Defence, Nadanian Variation

Grünfeld Defence, Nadanian Variation
abcdefgh
8
a8 black rook
b8 black knight
c8 black bishop
d8 black queen
e8 black king
f8 black bishop
h8 black rook
a7 black pawn
b7 black pawn
c7 black pawn
e7 black pawn
f7 black pawn
h7 black pawn
g6 black pawn
d5 black knight
a4 white knight
d4 white pawn
a2 white pawn
b2 white pawn
e2 white pawn
f2 white pawn
g2 white pawn
h2 white pawn
a1 white rook
c1 white bishop
d1 white queen
e1 white king
f1 white bishop
g1 white knight
h1 white rook
8
77
66
55
44
33
22
11
abcdefgh
Moves 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.Na4
ECO D85
Origin Chess Informant 67 (1996)
Named after Ashot Nadanian
Parent Grünfeld Defence
Synonym(s) Nadanian Attack

The Nadanian Variation (sometimes called the Nadanian Attack) of the Grünfeld Defence is a chess opening characterised by the moves:

1. d4 Nf6
2. c4 g6
3. Nc3 d5
4. cxd5 Nxd5
5. Na4

The Nadanian Variation is classified in the Encyclopaedia of Chess Openings (ECO) with the code D85.[1]


History

The variation is named after the Armenian International Master Ashot Nadanian, who first employed it in 1996. His analysis was published in the 67th volume of Chess Informant.

The birth of the variation has caused major ripples in the chess world. One of the world's most authoritative chess editions New in Chess Yearbook printed on the front cover of the 45th volume the following: "A Revolution in the Gruenfeld: 5.Na4!?!".[2] Grandmaster Jonathan Rowson wrote in his book Understanding the Grünfeld that Nadanian "should be congratulated for seeing what everyone has seen, and thinking what nobody had thought".[3]

The famous chess theoretician Grandmaster Igor Zaitsev wrote in the Russian chess magazine 64:

The continuation 5.Nа4 of Armenian chess player Nadanian shakes by the extraordinariness. Yes, extraordinariness, because it is unusual among the unusual. A voluntary removal of the knight from the centre, yet that has gone on advantage? Therefore, the value of such centrifugal maneuver is beyond a simple theoretical novelty, in a certain measure it is a challenge to chess foundations, an attempt to grope new properties in two-dimensional chess space.[4]

Theory

White's fifth move is overprotecting the key c5-square in the Grünfeld Defence, thus aspires to prevent an attack on the pawn centre by c7–c5. The extravagancy of White's idea is that they break at once two opening principles: avoid moving the same piece twice, and avoid placing a knight on the edge of the board. However, according to Nadanian,[4] the position after the fifth move is an exception to the rules. By placing the knight on а4, White takes under control the critical square c5, and by next move 6.e4 will return a tempo back, as Black too will play an already developed piece (knight on d5).

White should aspire to the following arrangement: e4, Be3, Be2, Nf3, 0-0, Rc1, Nc5. Black in turn should not allow this scheme for what it is necessary for them to put pressure on the d4 pawn.[5]

The main line continues 5...Bg7 6.e4 Nb6 (Avrukh's 6...Nb4 is also interesting) 7.Be3 0-0 8.Nf3 Bg4 (instead 8...Nxa4 9.Qxa4 c5 10.Rd1 Qb6 11.Rd2 was good for White in Korchnoi–Sutovsky, Dresden 1998) 9.Be2 Nc6 10.d5 Ne5 11.Nxe5 Bxe2 12.Qxe2 Nxa4 with approximately equal chances.

Another possible line is 5...e5 6.dxe5 Nc6 (suggested by Igor Zaitsev and first played by Mikhalchishin), which is according to Lubomir Kavalek "perhaps the only way to punish the white knight's venture to the edge of the board".[6] After 7.a3 (Nadanian's idea) 7...Bf5 8.Nf3 Qd7 9.e3 0-0-0 10.Be2 (Eingorn gives 10.Bb5 Qe6) 10...Qe7 11.Qb3 Bg7 according to Yelena Dembo Black has a powerful initiative (Kantsler–Avrukh, Israel 1999).[7]

Use

The variation's most devoted practitioner has been its eponym, Ashot Nadanian. Various famous players such as Swiss Grandmaster Viktor Korchnoi, Chinese Super-grandmaster Bu Xiangzhi, American GM Walter Browne, Scottish GM Jonathan Rowson, Russian GM Andrei Kharlov, Israeli GM Vitali Golod and Croatian GM Bogdan Lalić have employed it at some time or another, though few have made it their main line against the Grünfeld Defence.

Example games

Modified versions

There are also modified versions of Nadanian's idea.

See also

References

  1. ↑ Pope, Jacques N. "Openings classified under ECO D70–D99". Chess Archaeology. Retrieved 2009-06-27.
  2. ↑ "New in Chess Yearbook vol. 45. A Revolution in the Gruenfeld". Open Library. Retrieved 2009-06-27.
  3. ↑ Rowson 1998, p. 56.
  4. 1 2 64 (chess magazine) 10/1998 (in Russian)
  5. ↑ Aschot Nadanjan "Die Superprophylaxe 5.Sa4 im Grünfeldinder", Kaissiber, No. 3, Juli–September 1997, pp. 60–63 (in German)
  6. ↑ Kavalek, Lubomir (2010-01-04). "Chess". The Washington Post. Retrieved 11 January 2010.
  7. ↑ Dembo 2007, p. 83.
  8. ↑ "Secrets of Opening Surprises, Volume 2". New in Chess. Retrieved 2009-06-27.
  9. ↑ Flear, Glenn. "Grünfeld". ChessPublishing.com. Retrieved 2009-06-27.
  10. ↑ "Yandemirov Valeri defeats Nadanian Ashot in 77 moves". MasterChessGames.com. Retrieved 2009-06-27.
  11. ↑ Hansen, Carsten. "Checkpoint" (PDF). ChessCafe.com. Retrieved 2009-06-27.

Further reading

The Wikibook Chess Opening Theory has a page on the topic of: Nadanian Variation
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