English Opening
At 1400–1799 Elo, theory ends around half-move 10. The move that leaves it is a mistake in 9% of cases, 5.5 times as often as a move inside it.
Where theory ends
Half-move at which a game leaves what at least 100 games played. Half of all games end between the two outer numbers.
- up to 13999half-movehalf of the games: 7 to 12
- 1400–179910half-movehalf of the games: 8 to 13
- 1800+12half-movehalf of the games: 9 to 15
How risky the exit is
Share of moves that lose at least 10 points of winning chances, in the same stretch of the game (half-moves 8 to 24).
up to 1399
- Inside theory2.7%
- The move that leaves it14.4%
- After it15.1%
5.3× the risk of a move inside theory
1400–1799
- Inside theory1.6%
- The move that leaves it8.8%
- After it10.1%
5.5× the risk of a move inside theory
1800+
- Inside theory0.6%
- The move that leaves it4.8%
- After it6.3%
8.0× the risk of a move inside theory
Most common mistakes inside theory
Moves the engine rates down although many players choose them. The last move of each line is the mistake, the loss is the mean in points of winning chances.
- 1. c4 d5 2. Nc322,215 played, 12.8 points lost
- 1. Nf3 e5 2. c43,417 played, 11.7 points lost
- 1. c4 d5 2. cxd5 Qxd5 3. Nc3 Qe63,373 played, 11.8 points lost
- 1. c4 e5 2. Nc3 Nf6 3. Nf3 Bc53,218 played, 10.3 points lost
- 1. c4 e5 2. Nc3 Bc5 3. g3 Nf6 4. Bg2 Ng42,778 played, 10.8 points lost
- 1. c4 d5 2. c52,359 played, 17.1 points lost
Where does your theory end?
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Opening names from the Lichess opening database (CC0). A game belongs to the most specific named opening it reaches within 39 half-moves.