Larsen's Opening

When Larsen system (including Larsen opening or Nimzowitsch - Larsen Opening ) is a chess opening.

The Larsen system is one of the closed-end games and is classified in the opening system of the ECO codes under the key A01. The Larsen system is by train (see also: Chess notation)

Initiated.

This understated design of the plans by the White Fianchetto the dark-squared runner forth the influence of the center of the flank. The most common answer trains are e7 - e5, d7 -d5, c7 - c5 or Ng8 - f6. Depending on black counter are by diverter but numerous transitions into other possible openings:

• After 1 ... d7 -d5 2 f4 - f2 results in the Bird Opening. This may also enter it later according to Example 2 Lc1 - c7 - c5 3 b2 e2 -e3 ( The position after 3 Sg1 -f3 was created by diverter in the final of the competition candidates Petrosian -. Bobby Fischer, Buenos Aires, 1971 4 e2 -e3 would have been then replies with e7 - e5. ) Sb8 - c6 - b5 4 Lf1 Bc8 - d7 5 Sg1 -f3 - f6 Ng8 6 e7 - e6 7 0-0 d2 -d3 - d6 Bf8 8 Lb5xc6 Ld7xc6 9 Nf3 - e5 Ta8 c8 - 10 a2 -a4 0-0 11 Nb1 -d2 - d7 Nf6 12 Se5xd7 Dd8xd7 result by 13 f2 - f4.
• After 1 ... c7 - c5 2 e2- e4 is a rare variant of the Sicilian Defence on the board.

Namesake of this opening are the Danish grandmaster Bent Larsen or Aaron Nimzowitsch. In the well known game of Larsen - Spassky, Belgrade 1970, subject to the Dane with this system, however, in spectacular fashion in just 17 moves.