My favourite opening, The Queens Gambit. I consider myself an expert on its theory. I rarely play anything other than it regardless of what black plays.

this is a solid opening... 

hard to break through

Good trap:

i like anderssen opening,and polish. ihate queens gambit,b'coz its so familiar.plenty counter attack.

I prefer the Slav, but there's nothing wrong with this either.

Actually Wikipedia is an astonishing resource on chess.

I am actually practising a line of defence on the Queen's Gambit Declined now. So I will let you know how I get on. Come on black!

Wikipedia

Thanks Mr Doyle for explaining Queen's Gambit (+ Declined). It is hard to understand variations without understanding the original. Though I thought it all came out of your head at first. 

D30: Queen's Gambit Declined (QGD) is a chess opening when after White plays the Queen's Gambit:

1. d4 d5

2. c4

Black declines the pawn offered by White and plays:

2. ... e6

By declining the temporary pawn sacrifice, Black erects a solid position; the pawns on d5 and e6 give Black a foothold in the center. The Queen's Gambit Declined has the reputation as being one of Black's most reliable defenses to 1.d4. Playing 2...e6 releases Black's dark-squared bishop, while obstructing the light-squared bishop. White will try to exploit the passivity of this bishop, and Black will try to release it, trade it, or prove that, while passive, the bishop has a useful defensive role.

The Queen's Gambit Declined is often reached by a number of other move orders, such as 1.d4 e6 2.c4 d5; 1.d4 Nf6 2.c4 e6 3.Nf3 d5; 1.c4 e6 2.Nc3 d5 3.d4; or 1.Nf3 d5 2.c4 e6 3.d4.

An eventual ...dxc4 from Black will surrender the center to White, and Black will usually not do this unless he can extract a concession, which is usually in the form of waiting for White to play Bd3, only then capturing on c4. In the Orthodox line, the 'fight for the tempo' revolves around White's efforts to play all other useful developing moves before Bd3

In its broadest sense, the Queen's Gambit Declined is any variation of the Queen's Gambit in which Black does not capture the pawn on c4. Other variations where Black does not capture on c4 have their own names and are usually treated separately.  Of these, the most important is the Slav Defense.

• 1.d4 d5 2.c4 c5 Symmetrical Defense
• 1.d4 d5 2.c4 c6 Slav Defense
• 1.d4 d5 2.c4 Nc6 Chigorin Defense
• 1.d4 d5 2.c4 e5 Albin Countergambit
• 1.d4 d5 2.c4 Bf5 Baltic Defense
• 1.d4 d5 2.c4 Nf6 Marshall Defense

Of the 34 games played of the 1927 world championship between Alexander Alekhine and José Raúl Capablanca, all except the first and third began with the Queen's Gambit Declined.

Black avoids 3...Nf6

After 1.d4 d5 2.c4 e6 3.Nc3 (other third moves are also possible: 3.cxd5 may be played to lead to the Exchange line, 3.Nf3 keeps options open, and 3.g3 will transpose to the Catalan), Black's main move is 3...Nf6 however he has other options as well:

• If Black now plays 3...c6, the Semi-Slav Defense may be reached via 4.Nf3 Nf6, though 4.e4 dxe4 5.Nxe4 Bb4+ 6.Bd2 (6.Nc3 c5 gives little) Qxd4 7.Bxb4 Qxe4+ 8.Be2 leads to a sharp struggle, and 4.Nf3 dxc4 is the Noteboom Variation, also sometimes known as the Abrahams Variation, after the English master, Gerald Abrahams.

• If Black is willing to accept an isolated d-pawn he can play 3...c5. This leads to a variation of the QGD called the Tarrasch Defense.

• 3...Be7 usually transposes to positions arising from 3...Nf6, and has the advantage, from Black's standpoint, of avoiding the insidious pressure of the main lines in the Exchange Variation. After 3...Nf6 4.cxd5 exd5 White has the annoying pin 5.Bg5, but 3...Be7 circumvents this. White will now usually play 4.cxd5 exd5 5.Bf4 Nf6 6.e3, when 6....Bf5 7.g4 became a topical line after its adoption by Mikhail Botvinnikin his 1963 title match with Tigran Petrosian.
• 3...Bb4?! is a mixture of a QGD and the Nimzo-Indian, and at this point an inaccuracy. White has at least two good continuations, 4.Qa4+ Nc6 where Black is forced to block the c-pawn with the knight, and 4.a3 Bxc3 5.bxc3, when White obtains the bishop pair, and is ready to get rid of the doubled pawns with cxd5 on the next move. 

Main Variations of QGD (3...Nf6)

I have been practicing thes one for a long time but I have not been very succsusful. I base it off the Alekhine vs. Capablanca game 34

hello!

queen's gambit has proved very useful for me, especially against those who are not familiar with it. They don't usually accept the gambit though, but if they don't know about the gambit I doubt they know about the goddamn elephant.

everytime i play this i win d game

Why?You got a cramped position where its difficult to play for a win. I prefer 2. ...c6(the Slav)

i like this!