King's Pawn Opening — opening family
3 catalogued lines · ECO C20–C20
The shortest catalogued line of the family runs 1. e4 e5 2. b3 — the position below. The continuation chips count how many catalogued lines extend this head with each next move; explore the full tree below and play any branch against the engine.
Variations tree of the King's Pawn Opening family
Click any move to jump to that position; switch branches at any point with the alternative moves. Test your knowledge plays the shown position against the engine.
Start
All 3 lines
| Name | ECO | Main line length |
|---|---|---|
| King's Pawn Opening | C20 | 3 plies |
| King's Pawn Opening: Speers | C20 | 5 plies |
| King's Pawn Opening: Van Hooydoon Gambit | C20 | 12 plies |