Anderssen's Opening

Welcome to Anderssen's Opening, one of the most psychologically cunning first moves in chess. With a3 , White makes a quiet but purposeful pawn move, telling Black: you go first. The real idea is right here on the purple square. White is preparing to push b4 on the very next move, launching a queenside expansion before Black even knows what's happening.

The most common response from Black is d5 , claiming the center. And this is exactly what you want to see. You immediately push b4 , grabbing space on the queenside. This is the heart of Anderssen's Opening — you're building a wall of pawns on the queenside while preparing to unleash your dark-squared bishop.

After Black develops with Nf6 , you fianchetto your bishop to b2 . This is your secret weapon. The bishop fires down the long diagonal, aiming straight at the critical e5 and f6 squares. If Black ever plays e5 , this bishop will be staring right at it. The long diagonal gives you lasting pressure throughout the game.

Here's the full plan coming together. After e6 , you play e3 to support your center, and after Black develops with Bd6 , you strike with c4 . Look at your pawn structure on the green squares — a3 , b4 , c4 , and e3 form a beautiful queenside pawn chain. The c4 pawn directly challenges Black's d5 pawn, creating central tension. You've built up your queenside while Black was just developing normally.

If Black pushes e5 , trying to grab the center, you have the fantastic c5 push. This is a great move! The c5 pawn clamps down on the queenside and forces Black's bishop to make a decision. If the bishop retreats, you've gained space. Meanwhile, your Bb2 is now staring directly at e5 , and the d6 square becomes a permanent weakness in Black's camp.

Now what if Black opens with e5 instead? Same plan — you push b4 and develop Bb2 . After Black plays d5 , your bishop immediately puts pressure on that e5 pawn on the orange square. Black has the center, but you're targeting it from the flank. This is the beauty of the Anderssen system — no matter what Black does, your b4 and Bb2 plan stays the same.

Here's another powerful option. After d5 , instead of b4 , you can play d4 , transposing into a London System or Queen's Pawn game. After Nf6 , Nf3 , e6 , and Bf4 , you've reached a standard London position — but with a3 already played for free! That pawn on a3 is useful in so many ways. It prevents Black's bishop from coming to b4 , and it keeps the b4 square ready for your own pawn push whenever you want it.

Now here's the danger you need to avoid. After b4 and Bb2 , do not rush to push b5 too early. This is an inaccuracy. Your b5 pawn becomes a target, and more importantly, your a3 pawn is left weak and isolated. Black can attack it with a6 , eventually opening the a-file and crashing through on the queenside you were trying to dominate. Instead of b5 , play e3 and c4 first — build the center before expanding further.

Here's your dream setup. The bishop on b2 , the knight on f3 , and the c4 pawn all work together, highlighted in green. Your next steps are shown by the purple arrows — develop your bishop to d3 , aiming at the kingside, and your knight to d2 to support the c4 pawn. After that, castle kingside, and you have a harmonious position with pressure on both flanks. This is exactly where you want to be with Anderssen's Opening.

Let's recap your game plan with Anderssen's Opening. After a3 , your first priority is the green arrows — push b4 and develop the bishop to b2 , seizing the long diagonal. Then follow the purple arrows — play e3 to solidify your center and c4 to challenge Black's d5 pawn. From there, develop your knights to f3 and d2 , put your bishop on d3 , and castle kingside. You can also transpose into a London System with d4 if you prefer. The strength of this opening is its flexibility — you let Black commit first, then choose your weapon. Play with confidence, and enjoy catching your opponents off guard!