411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...e6/2. d4/2...d5/3. Nc3/3...Bb4/4. e5/4...c5/5. a3/5...Bxc3/6. bxc3/6...Ne7/7. Qg4
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Winawer variation Winawer variation
7. Qg4
By playing 7. Qg4, White immediately attacks Black's unprotected g7 pawn.
Now it's Black's choice whether they want to defend the pawn, e.g. by playing /7...O-O/ or /7...Kf8/, or whether they're
going to sacrifice the g7-Pawn and prepare some counterplay on the queenside instead. For this purpose
Black can try /7...Qc7/, the Poisoned Pawn variation. This variation can also be transposed into via /7...cxd4/.
Theory table
Warsaw variation 7. ... O-O 8. Bd3 f5 9. exf6 Rxf6 10. Bg5 Eingorn variation 7. ... Kf8 8. Bd2 Qc7 9. Bd3 Poisoned pawn variation 7. ... Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2 7. ... cxd4 8. Qxg7 Rg8 9. Qxh7 Qc7 10. Ne2
References
French Defence