Chess Opening Theory/1. d4/1...d5/2. c4/2...c6/3. Nc3/3...dxc4/4. e3/4...b5/5. Nxb5/5...cxb5/6. Qf3/6...Nc6/7. Qxc6/7...Bd7/8. Qf3/8...e5/9. dxe5/9...Bb4

Slav Defence
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Position in Forsyth-Edwards Notation (FEN)
Moves: 1. d4 d5 2. c4 c6 3. Nc3 dxc4 4. e3 b5 5. Nxb5 cxb5 6. Qf3 Nc6 7. Qxc6 Bd7 8. Qf3 e5 9. dxe5 Bb4


9...Bb4+

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This move forces Ke2, since Kd1 Bg4+ and Bd2 Bxd2+ Kxd2 Bg4+ both win white's queen. Note how vulnerable white's king is, with the g4-d1 diagonal and d-file becoming open.

Theory table

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9 10
Ke2

Nh6

Qf4

Bf5

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