Key ideas
- All four Stonewall pawns stand on light squares. That gives Black a firm hold on e4, but it makes the c8 bishop bad and leaves the dark squares, above all e5, without pawn protection.
- The classic plan against the Stonewall is b3 and Ba3 to exchange Black's good dark-squared bishop (7.b3 c6 8.Ba3 is the Botvinnik Variation), followed by a knight on e5. Bf4 serves the same purpose.
- Black's plans are a knight on e4, kingside play with ...Qe8 and ...Qh5, and solving the bishop problem either with ...b6 and ...Bb7 or with the manoeuvre ...Bd7-e8-h5.
- In the Modern Stonewall, Black puts the bishop on d6 instead of e7, where it fights for e5 and makes White's plan of exchanging it harder to carry out.
Plans for White
Exchange the dark-squared bishops with b3 and Ba3 or with Bf4, plant a knight on e5, and play on the queenside and the c-file. f3 to drive a knight from e4 is a typical idea once White's pieces are in place.
Plans for Black
Keep a knight on e4, solve the bishop problem with ...b6 and ...Bb7 or ...Bd7-e8-h5, and attack on the kingside with ...Qe8, ...Qh5 and ...g5 when White commits to the queenside.
For the wider picture, see the Dutch Defense guide.