Which opening is this?
Play moves on the board or type them in. The finder replays them and names the deepest position on the way that appears in the list of 3,865 named lines, with its ECO code.
From the starting position
No move played yet. The list starts with 20 different first moves; this is how many of its lines begin with each, and the named position each one reaches straight away.
| Move | Lines | Named position after it |
|---|---|---|
| 2,032 | B00 King’s Pawn Game | |
| 1,333 | A40 Queen’s Pawn Game | |
| 202 | A10 English Opening | |
| 109 | A04 Zukertort Opening | |
| 29 | A00 Van Geet Opening | |
| 27 | A00 Polish Opening | |
| 27 | A02 Bird Opening | |
| 21 | A00 Hungarian Opening | |
| 20 | A00 Grob Opening | |
| 15 | A01 Nimzo-Larsen Attack | |
| 9 | A00 Kádas Opening | |
| 7 | A00 Ware Opening | |
| 6 | A00 Van’t Kruijs Opening | |
| 6 | A00 Barnes Opening | |
| 5 | A00 Anderssen’s Opening | |
| 5 | A00 Mieses Opening | |
| 4 | A00 Sodium Attack | |
| 4 | A00 Clemenz Opening | |
| 3 | A00 Amar Opening | |
| 1 | A00 Saragossa Opening |
How to use it
Click a piece, then the square it should go to. Or type the moves of your game into the box, with or without move numbers (1.e4 c5 2.Nf3 and e4 c5 Nf3 both work, as do O-O and 0-0). Every move is checked for legality; an illegal or unreadable move stops the reading there and is shown in red.
The answer is the last position in your moves that carries a name in the list. That is the convention the list itself recommends: read the game backwards until a named position turns up. Because positions are compared rather than move sequences, a different move order into the same position is recognised. Under the board, the moves that keep you inside named territory are offered as buttons, with the number of named lines that pass through each resulting position.
The finder only names positions. It does not judge moves, suggest what to play or say how often an opening is played; the list contains no game results. Opening names are those of the lichess-org/chess-openings list (CC0).