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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...b5/6. Bb3

< Chess Opening Theory | 1. e4 | 1...e5 | 2. Nf3 | 2...Nc6 | 3. Bb5 | 3...a6 | 4. Ba4 | 4...Nf6 | 5. O-O | 5...b5
Ruy Lopez
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 kingc7 black pawnd7 black pawne7 black kingf7 black pawng7 black pawnh7 black pawn7
6a6 black pawnb6 black kingc6 black knightd6 black kinge6 black kingf6 black knightg6 black kingh6 black king6
5a5 black kingb5 black pawnc5 black kingd5 black kinge5 black pawnf5 black kingg5 black kingh5 black king5
4a4 black kingb4 black kingc4 black kingd4 black kinge4 white pawnf4 black kingg4 black kingh4 black king4
3a3 black kingb3 white bishopc3 black kingd3 black kinge3 black kingf3 white knightg3 black kingh3 black king3
2a2 white pawnb2 white pawnc2 white pawnd2 white pawne2 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/2pp1ppp/p1n2n2/1p2p3/4P3/1B3N2/PPPP1PPP/RNBQ1RK1 b

Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3
Parent: Ruy Lopez

Ruy Lopez

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Ruy Lopez Arkhangelsk/Møller Variations

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The move ...b5 is seen at some point in most variations of the main line Ruy Lopez, so Black has a few transpositional possibilities here: 6...d6 or 6...Be7 will probably end up in the standard Closed Variation (5...Be7 6. Re1 b5) and 6...Nxe4 almost certainly leads back to the Open Variation.

Basically, replacing ...Be7 with ...b5 means that Black has retained the option of setting up bishops at b7 and c5. The two independent moves, therefore, are the Arkhangelsk 6...Bb7 and the Møller 6...Bc5. They may transpose into each other.

It's always to Black's advantage to have something to play against the Lopez other than the old main lines, which is why these two sound, aggressive variations, along with 5...Bc5, have experienced a major revival of late.

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References

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Wikipedia has related information at Ruy Lopez

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