King's Gambit Accepted
At 1400–1799 Elo, theory ends around half-move 12. The move that leaves it is a mistake in 30% of cases, 2.8 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 139911half-movehalf of the games: 10 to 13
- 1400–179912half-movehalf of the games: 10 to 14
- 1800+13half-movehalf of the games: 11 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 theory13.2%
- The move that leaves it35.5%
- After it21.6%
2.7× the risk of a move inside theory
1400–1799
- Inside theory10.7%
- The move that leaves it29.6%
- After it17.9%
2.8× the risk of a move inside theory
1800+
- Inside theory7.2%
- The move that leaves it22.6%
- After it14.4%
3.2× 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. e4 e5 2. f4 exf4 3. Nf3 Bc516,362 played, 15.9 points lost
- 1. e4 e5 2. f4 Nc6 3. Nf3 exf4 4. d4 d5 5. e59,647 played, 20.4 points lost
- 1. e4 e5 2. f4 exf4 3. Nf3 d5 4. e59,100 played, 14.7 points lost
- 1. e4 e5 2. f4 d6 3. Nf3 exf4 4. d4 Bg47,179 played, 11.1 points lost
- 1. e4 e5 2. f4 exf4 3. Nf3 Nc6 4. Bc4 Bc5 5. d4 Bb65,142 played, 12.6 points lost
- 1. e4 e5 2. f4 Nc6 3. Nf3 exf4 4. d4 d5 5. e5 Bg45,020 played, 16.4 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.