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Chess Opening Theory/1. e4/1...e5/2. Nf3/2...Nc6/3. Bb5/3...a6/4. Ba4/4...Nf6/5. O-O/5...Nxe4/6. d4/6...exd4/7. Re1/7...d5/8. Bg5

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< Chess Opening Theory‎ | 1. e4‎ | 1...e5‎ | 2. Nf3‎ | 2...Nc6‎ | 3. Bb5‎ | 3...a6‎ | 4. Ba4‎ | 4...Nf6‎ | 5. O-O‎ | 5...Nxe4‎ | 6. d4‎ | 6...exd4‎ | 7. Re1‎ | 7...d5
Ruy Lopez, Riga Variation
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 kingb7 black pawnc7 black pawnd7 black kinge7 black kingf7 black pawng7 black pawnh7 black pawn7
6a6 black pawnb6 black kingc6 black knightd6 black kinge6 black kingf6 black kingg6 black kingh6 black king6
5a5 black kingb5 black kingc5 black kingd5 black pawne5 black kingf5 black kingg5 white bishoph5 black king5
4a4 white bishopb4 black kingc4 black kingd4 black 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 black kingd1 white queene1 white rookf1 black kingg1 white kingh1 black king1
a b c d e f g h
Position in Forsyth-Edwards Notation (FEN)

r1bqkb1r/1pp2ppp/p1n5/3p2B1/B2pn3/5N2/PPP2PPP/RN1QR1K1 b

Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 exd4 7. Re1 d5 8. Bg5

Ruy Lopez, Riga Variation

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White's move threatens black's queen and attempts to eliminate the dark side bishop. Note that in the main line of the Riga Variation, that bishop is sacrificed on h2 for attacking chances on white's king.

8...Be7 accepts the trade, usually following 9.Bxe7 Kxe7 to break the pin coming from the a5 bishop.

8...f6 gets complicated. Now white has a piece in danger as well. White can respond Nxd4 and play can continue toward the main line. Simply moving the bishop again loses a tempo and the initiative.

8...Qd6 moves the queen out of the way, though it does take the square the bishop needs to sacrifice on h2.

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References

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