Chess Opening Theory/1. e4/1...e5/2. Nf3/2...d6

Philidor defence
a
b
c
d
e
f
g
h
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
a
b
c
d
e
f
g
h

Position in Forsyth-Edwards Notation (FEN)
Moves: 1. e4 e5 2. Nf3 d6
Parent: King's knight opening

2...d6 · Philidor defence

edit

Black defends their e5 pawn with 2...d6, sparing a piece from being saddled with the job.

Though solid, this is considered a more passive reply than 2...Nc6, as Black does not develop a piece and Black's pawn chain will get in the way of developing their dark square bishop.

3. d4 is the mainline, threatening to immediately crack open the centre with dxe5. White imagines a continuation like 3...Bg4?! 4. dxe5 dxe5? 5. Qxd8+ Kxd8 6. Nxe5 Be6 +- (White is up materiel, controls the centre, and Black has lost castling rights).

After 3. d4, Black's best approaches are to give up their centre and open the game with 3...exd4, the Exchange variation, or to hold on to e5 and keep the tension with 3...Nd7, the Hanham variation. Black's most Romantic reply is 3...f5?!, the Philidor countergambit.

3. Bc4 is an alternative for White. White may just follow with d4 anyway and transpose, or they may wish to play less confrontationally with d3 and are ensuring their bishop isn't hemmed in by their pawn chain first.

History

edit

2...d6 was recommended as an alternative to defending the pawn with 2...Nc6 by 16th century chess theoretician Ruy López de Segura, in order to avoid the reply 3. Bb5 (i.e. the Spanish opening) which he believed favoured White.

It is named for François-André Danican Philidor, the 18th century chess master, who advocated 2...d6 with the continuation 3. d4 f5?!, the Philidor countergambit, to assault White's centre.[1]

In 1858 it was employed unsuccessfully by the Duke of Brunswick and Comte Isougard in their game against Paul Morphy. The Opera Game, as it is called, is widely used as an illustrative game in chess pedagogy today.[2]

Its popularity declined in the 20th century and it is no longer seen at the top levels of chess.

Theory table

edit

For explanation of theory tables, see theory table and for notation, see algebraic notation..

1. e4 e5 2. Nf3 d6

3 4 5
1 d4
exd4
Nxd4
Nf6
Nc3
Be7
=
2 Bc4
Be7
d3
Nf6
c3
O-O
=

When contributing to this Wikibook, please follow the Conventions for organization.

References

edit
  1. ChessBase (2016). Philidor's "L'Analyze des Echecs".
  2. Chessgames.com (2023). Paul Morphy vs Duke Karl / Count Isouard.

Bibliography

edit


v · t · e
Chess openings quick reference
1. e4
2. Nf3
With 2...Nc6:
With other 2nd moves:
2. Other
1... other
1. d4
Flank
Unorthodox