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Chess Opening Theory/1. e4/1...d5/2. exd5/2...Qxd5/3. Nc3

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Scandinavian Defence
a b c d e f g h
8a8 black rookb8 black knightc8 black bishopd8 black kinge8 black kingf8 black bishopg8 black knighth8 black rook8
7a7 black pawnb7 black pawnc7 black pawnd7 black kinge7 black pawnf7 black pawng7 black pawnh7 black pawn7
6a6 black kingb6 black kingc6 black kingd6 black kinge6 black kingf6 black kingg6 black kingh6 black king6
5a5 black kingb5 black kingc5 black kingd5 black queene5 black kingf5 black kingg5 black kingh5 black king5
4a4 black kingb4 black kingc4 black kingd4 black kinge4 black kingf4 black kingg4 black kingh4 black king4
3a3 black kingb3 black kingc3 white knightd3 black kinge3 black kingf3 black kingg3 black kingh3 black king3
2a2 white pawnb2 white pawnc2 white pawnd2 white pawne2 black kingf2 white pawng2 white pawnh2 white pawn2
1a1 white rookb1 black kingc1 white bishopd1 white queene1 white kingf1 white bishopg1 white knighth1 white rook1
a b c d e f g h
Position in Forsyth-Edwards Notation (FEN)

rnb1kbnr/ppp1pppp/8/3q4/8/2N5/PPPP1PPP/R1BQKBNR b

Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3

Scandinavian Defense: Mieses-Kotrč Variation, 3.Nc3

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In this position, black queen is under attack and must find a safe square. There are several possibilities.

3...Qa5 is the most common. The queen cannot be attacked again, but she can pin the knight if White dares to advance his d-pawn and she can later move to b6 to target the b2 pawn.
3...Qd6 and 3...Qd8 are less aggressive alternatives.
3...Qe5+ and 3...Qe6+ check the king, inviting White to play 4. Be2 and weaken the g2 pawn.

Of course, Black cannot play 3... Qc6?? because of 4. Bb5, winning the Queen by pinning it to the king.

Theory table

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

1. e4 d5 2. exd5 Qxd5 3. Nc3

3
Main line -
Qa5		 =
-
Qd6		 =
Valencian Variation -
Qd8		 =
Patzer Variation -
Qe5+		 =
-
Qe6+		 =

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Wikipedia has related information at Scandinavian Defence

References

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