Colle System (콜 시스템)
한국어The Colle System family holds 3 lines. The boards below follow its shortest line from the first move.
The Korean name in brackets is ours, not an official translation. The original name is English.
Main line
1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+
One move per board, left to right. The two outlined squares are the move just played.
Play it yourself
Colle System (A04)
1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+
Tap a piece and then the square it goes to. When the move matches the data, the reply follows on its own.
Your move.0 of 8 moves played.
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ECO codes here
Variations in this family
Ordered by ECO code. A blank label means the entry carries the family name alone.
A04Rhamphorhynchus Variation8 movesPlay this line
1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+
A40Pterodactyl Variation8 movesPlay this line
1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+
A40Siroccopteryx Variation10 movesPlay this line
1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+
Other families of similar size
Data collected on 2026-09-07. The original is published as a public domain data set.