♞CHESS:
AN AI LESSON

PIRC DEFENCE · LESSON 4 OF 6

Meet the
150 Attack.

Be3 and Qd2 often announce Bh6, f3, queenside castling and a kingside pawn storm. Black needs accurate threat recognition and fast counterplay.

Key setup: Be3 and Qd2

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Recognise the attacking picture

White develops Be3 and Qd2, often adds f3, castles queenside and pushes h4–h5. The queen and bishop battery points toward h6, where White may exchange Black’s g7-bishop.

The setup looks dangerous, but White has spent time preparing it. Black can use those tempi to challenge the centre or begin queenside play. Count moves rather than panicking at the shape.

Example board: the 150 Attack signal

Be3 and Qd2 tell you what White is preparing.

Understand Bh6

Bh6 aims to exchange the g7-bishop, an important defender and attacker. Black may allow the trade if it gains time or supports central play, or move the bishop when the resulting squares matter. Do not move it automatically just because it is attacked.

After Bxg7, Black’s king can lose a dark-square defender, but White has also exchanged an attacking bishop. Evaluate the resulting position: open lines, queen activity and the speed of each attack are more important than keeping a particular piece at all costs.

Example board: White prepares opposite-side castling

White’s pieces point toward the kingside. Black must create play, not wait.

Opposite-side castling changes the clock

When White castles queenside and Black castles kingside, both players may push pawns toward the enemy king. Speed matters, but so does opening the correct file. A pawn push that does not create a threat may simply weaken your own king.

Black often uses …c6, …b5 or central breaks to open lines toward the queenside. Before pushing, locate White’s king and decide which file your rook or queen could actually use.

Example board: central counterplay interrupts the attack

Compare …e5 and …c5 as ways to force White to respond.

Create a question before answering every threat

If White threatens Bh6, h5 or e5, identify whether it is immediate. When there is time, a central strike can force White to pause. When there is no time, meet the threat directly and then resume counterplay.

This is the balance: do not ignore a real mating attack, but do not become so defensive that White attacks without resistance.

Common mistakes

  • Reacting to the shape instead of the threat: ask what White can do next.
  • Launching queenside pawns without open lines: know which file you want.
  • Ignoring the centre: White’s attack is easier when d4 and e4 remain untouched.
  • Trading the g7-bishop automatically: judge the resulting dark squares and time.
  • Defending forever: make White answer a central or queenside question.

Practice and memory card

  • Be3 and Qd2 often prepare Bh6, f3 and queenside castling.
  • Count the speed of both attacks.
  • Use …e5 or …c5 to interrupt White’s setup.
  • If kings castle opposite sides, open a useful file toward White’s king.
  • Meet immediate threats, then return to counterplay.

Quick questions: What does Bh6 try to exchange? Why is a central break useful? What matters more than simply pushing pawns quickly?

Reveal answers

Bh6 targets the g7-bishop. A central break forces White to respond and attacks the base of the position. Opening a useful file and creating real threats matters more than pushing pawns without a destination.