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Flight square

From Wikipedia, the free encyclopedia
abcdefgh
8
e8 black rook
d6 black cross
f6 black cross
d5 black cross
e5 white king
f5 black cross
d4 black cross
f4 black cross
8
77
66
55
44
33
22
11
abcdefgh
Flight squares are marked with crosses.

In chess, a flight square or escape square is a safe square to which a piece, especially a king,[1] can move if it is threatened.

Providing one's piece with flight squares can prevent the opponent from winning material or delivering checkmate. For example, in the Morphy Defence, the white c-pawn may be advanced to provide the light-squared white bishop with a flight square. Conversely, it is possible to take away an enemy piece's flight squares, known as domination.

Luft

[edit]
abcdefgh
8
e8 black rook
h8 black king
b7 white rook
b3 black pawn
f2 white pawn
g2 white pawn
h2 white pawn
h1 white king
8
77
66
55
44
33
22
11
abcdefgh
If it is Black's move, he checkmates White with 1...Re1#. If it is White's turn, he must create luft by advancing either his g-pawn or h-pawn. After avoiding checkmate and then capturing the opponent's passed pawn, White should win this game.

In chess, luft (the German word for "air", sometimes also "space" or "breath") designates the space or square left by a pawn move into which a king (usually a castled one) may then retreat, especially such a space made intentionally to avoid back-rank checkmate.[2] A move leaving such a space is often said to "give the king some luft". The term "luft", "lufting", or "lufted" may also be used (as an English participle) to refer to the movement of the relevant pawn creating luft.[3]

Preventing an opponent from lufting a pawn (for example by pinning it or moving a piece to the square in front of it) is a tactic that may lead to checkmate. A king's access to his luft might also be denied by the opponent subjecting the space or square to attack.

The German luft is a close cognate to the English "lift", which is also used in chess, e.g., rook lift.

Examples

[edit]
abcdefgh
8
b8 black king
f8 white queen
a7 black pawn
b7 black cross
c7 black pawn
a6 black circle
b6 black pawn
c6 black circle
d6 white knight
a5 white knight
c5 white knight
d5 white bishop
f4 black bishop
g4 black knight
f3 black knight
g3 black circle
h3 white pawn
f2 white pawn
g2 white pawn
h2 black cross
c1 black queen
g1 white king
8
77
66
55
44
33
22
11
abcdefgh

In the diagram at left, "X"s mark luft to which the king can escape back-rank checkmate delivered by the queen. Theoretical enemy knights in the indicated positions deny the king access to his luft. Black dots indicate areas where threats emanating from enemy pieces capable of capturing diagonally could also deny access. The pawn structure seen in Black's position is less secure, but it is a risk commonly accepted to fianchetto.

abcdefgh
8
e8 black queen
g8 black king
e7 black rook
f7 black pawn
g7 black pawn
b6 black pawn
d6 black knight
g6 white circle
a5 black pawn
c5 black pawn
d5 white bishop
c4 white pawn
f4 white knight
h4 white rook
b3 white pawn
h3 white pawn
a2 black rook
f2 white pawn
g2 white pawn
h2 white king
8
77
66
55
44
33
22
11
abcdefgh

Being up a queen in the game on the right, Black will win unless he overlooks the threat of Ng6 (which sets up checkmate via Rh8#). Black wouldn't be able to capture the knight or create luft because his f-pawn is pinned by White's bishop, and his g-pawn cannot advance if a piece is on g6 blockading it. White's king is temporarily safe from check in his luft. (Black can neutralize the threat of Ng6 by playing Qb8, as then Ng6 can be met by the discovered check of Nf5+, winning the checkmate-threatening h4 rook after White reacts.)

See also

[edit]

References

[edit]
  1. ^ Hooper & Whyld (1996), p. 141. flight.
  2. ^ Larry, Evans (2011). New ideas in chess. Cardoza Publishing. ISBN 978-1-58042-274-1. OCLC 646112792.
  3. ^ ""Queen Sacrifices"". (At the 45:26 mark, GM Ben Finegold of the Chess Club and Scholastic Center of Atlanta examines a game lost because the player is unable to luft due to his own pieces block his pawns.)

Bibliography

  1. Brace, Edward R. (1977), An Illustrated Dictionary of Chess, Hamlyn Publishing Group, ISBN 1-55521-394-4
  2. Hooper, David; Whyld, Kenneth (1996) [First pub. 1992]. The Oxford Companion to Chess (2nd ed.). Oxford University Press. ISBN 0-19-280049-3.
  3. Evans, Larry (2011). New ideas in chess. Las Vegas, Nev.: Cardoza Publishing. ISBN 978-1-58042-274-1. OCLC 646112792.