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The Colle Koltanowski System Trainer

Learn this flexible setup with c3 that builds the famous Colle triangle!

1. Basic Koltanowski Setup

In the Koltanowski version, White plays c3 to build a strong triangle of pawns d4‑e3‑c3 before attacking with e4 or f4.

  1. Pawn to d4 – Grab the center.
  2. Knight to f3 – Protect your pawn and develop.
  3. Pawn to e3 – Form the base of your pawn wall.
  4. Bishop to d3 – Point towards the enemy king.
  5. Pawn to c3 – The Koltanowski touch! Now you have a solid triangle.
  6. Castle kingside (O‑O) – Safety first before the push e4.

2. Why Play the Koltanowski System

3. Flashcards

Which move gives this system its name?
The move c3 that makes the pawn triangle!
When should you push e4?
After your king is castled and your pieces are ready.

4. Quiz Time!

Which pawns form the Koltanowski triangle?

A. a2‑b2‑c2
B. d4‑e4‑f4
C. c3‑d4‑e3
D. b3‑c3‑d3

What is White’s goal after building the triangle?

A. Swap queens early
B. Push b4
C. Move the king to d2
D. Play e4 or f4 to attack

5. Try Out Koltanowski Games (PGN Viewer)