The Semi-Tarrasch Defense is a
chess opening
A chess opening or simply an opening is the initial stage of a chess game. It usually consists of established theory; the other phases are the middlegame and the endgame. Many opening sequences have standard names such as the "Sicilian Defens ...
characterized by the following moves:
:1.
d4 d5
:2.
c4 e6
:3.
Nc3 Nf6
:4.
Nf3 c5
The Semi-Tarrasch is a variation of the
Queen's Gambit Declined
The Queen's Gambit Declined (or QGD) is a chess opening in which Black declines a pawn offered by White in the Queen's Gambit:
:1. d4 d5
:2. c4 e6
This is known as the ''Orthodox Line'' of the Queen's Gambit Declined. When the "Queen's Gambi ...
(''ECO'' codes D40 through D42).
General concepts
Unlike the regular
Tarrasch, in the Semi-Tarrasch Defense Black does not accept an isolated pawn, since they intend to recapture on d5 with the knight (as after 5.cxd5, 5...exd5 has long been known to be dubious after 6.Bg5), but they cede a advantage to White. The intended recapture with the f6-knight prevents Black from seamlessly transposing to the Semi-Tarrasch if White has played 4.Bg5.
After 4...c5, White usually plays 5.cxd5 Nxd5 6.e3 or 6.e4, which leads to different types of middlegame play and has attracted the interest of strong players with both colors since the early twentieth century.
Symmetrical Variation
In this line, White forgoes the
fianchetto
In chess, the fianchetto ( or ; "little flank") is a pattern of wherein a bishop is developed to the second rank of the adjacent b- or g-, the having been moved one or two squares forward.
The fianchetto is a staple of many " hypermodern" ...
, with its direct play against d5, opting to keep central tension for the moment by playing 5.e3, after which 5...Nc6 is the normal continuation. From this position, White may choose to inflict the isolated pawn on Black, accept the weakness themselves in return for active piece play, or play 6.a3, with a view to dxc5, followed by b4 and Bb2, aiming for positions in which the extra tempo will come in useful if Black keeps the symmetry; thus, 6...Ne4, once chosen by
Bobby Fischer
Robert James Fischer (March 9, 1943January 17, 2008) was an American chess grandmaster and the eleventh World Chess Champion. A chess prodigy, he won his first of a record eight US Championships at the age of 14. In 1964, he won with an 11â ...
in his
Candidates Match
The Candidates Tournament (or in some periods Candidates Matches) is a chess tournament organized by FIDE, chess's international governing body, since 1950, as the final contest to determine the challenger for the World Chess Championship. The wi ...
with
Tigran Petrosian
Tigran Vartanovich Petrosian (, ; 17 June 1929 – 13 August 1984) was a Soviet-Armenian chess grandmaster, and World Chess Champion from 1963 to 1969. He was nicknamed "Iron Tigran" due to his almost-impenetrable defensive playing style, ...
in 1971, gives a different turn.
Symmetrical Variation has ''ECO'' code D40.
See also
*
List of chess openings
This is a list of chess openings, organized by the ''Encyclopaedia of Chess Openings'' () code. In 1966, Chess Informant categorized the chess openings into five broad areas ("A" through "E"), with each of those broken down into one hundred subca ...
*
List of chess openings named after people
''The Oxford Companion to Chess'' lists 1,327 named openings and variants. Chess players' names are the most common sources of opening names. The name given to an opening is not always that of the first player to adopt it; often an opening is name ...
References
*
* {{Citation , last=de Firmian , first=Nick , authorlink=Nick de Firmian , year=2008 , title=
Modern Chess Openings
''Modern Chess Openings'' (usually called ) is a reference book on chess openings, first published in 1911 by the British players Richard Clewin Griffith (1872–1955) and John Herbert White (1880–1920). The fifteenth edition was published in ...
, edition=15th , publisher=McKay , isbn=978-0-8129-3682-7
Chess openings