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Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...Nf6/4. O-O/4...Nxe4/5. d4

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Ruy Lopez:Open Game
a b c d e f g h
8a8 black rookb8 black kingc8 black bishopd8 black queene8 black kingf8 black bishopg8 black kingh8 black rook8
7a7 black pawnb7 black pawnc7 black pawnd7 black pawne7 black kingf7 black pawng7 black pawnh7 black pawn7
6a6 black kingb6 black kingc6 black knightd6 black kinge6 black kingf6 black kingg6 black kingh6 black king6
5a5 black kingb5 white bishopc5 black kingd5 black kinge5 black pawnf5 black kingg5 black kingh5 black king5
4a4 black kingb4 black kingc4 black kingd4 white pawne4 black knightf4 black kingg4 black kingh4 black king4
3a3 black kingb3 black kingc3 black kingd3 black kinge3 black kingf3 white knightg3 black kingh3 black king3
2a2 white pawnb2 white pawnc2 white pawnd2 black kinge2 black kingf2 white pawng2 white pawnh2 white pawn2
1a1 white rookb1 white knightc1 white bishopd1 white queene1 black kingf1 white rookg1 white kingh1 black king1
a b c d e f g h
Position in Forsyth-Edwards Notation (FEN)

r1bqkb1r/pppp1ppp/2n5/1B2p3/3Pn3/5N2/PPP2PPP/RNBQ1RK1 b

Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4
Parent: Ruy Lopez

Ruy Lopez:Open Game

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Here Black has taken a pawn, but although both black and white have 2 developed pieces, the white rook on f1 and white's queen have more mobility, and white is already castled. Because of white's slight lead in development he is playing d4 to further open the position and make better use of his better development

Theory table

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

1.e4 e5 2.Nf3 Nc6 3.Bb5 Nf6 4.O-O Nxe4 5.d4
5 6 78
...
Nd6		 Bxc6
dxc6		 dxe5
Nf5		+=
Rio de Janeiro Variation ...
Be7		 Qe2
Nd6		 Bxc6
dxc6		Nb7

...

+=
Transposes to
Ruy Lopez Open Defence		 ...
a6		 Ba4 =

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References

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Wikipedia has related information at Ruy Lopez

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