Rat Defense
At 1400–1799 Elo, theory ends around half-move 10. The move that leaves it is a mistake in 8% of cases, 3.9 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: 8 to 11
- 1400–179910half-movehalf of the games: 8 to 12
- 1800+10half-movehalf of the games: 9 to 12
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 theory2.2%
- The move that leaves it11.3%
- After it15.8%
5.1× the risk of a move inside theory
1400–1799
- Inside theory2.0%
- The move that leaves it7.8%
- After it11.5%
3.9× the risk of a move inside theory
1800+
- Inside theory1.3%
- The move that leaves it5.3%
- After it8.3%
4.1× 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. d4 e6 2. e4 d6 3. e55,022 played, 12 points lost
- 1. e4 d6 2. f4 e5 3. fxe51,446 played, 23.2 points lost
- 1. e4 e6 2. d4 d6 3. e5 d51,229 played, 10.7 points lost
- 1. f4 d6 2. e4 e5 3. f51,145 played, 32.8 points lost
- 1. e4 d6 2. f4 Nf6 3. Nf3 g61,103 played, 13.6 points lost
- 1. e4 d6 2. f4 e5 3. fxe5 dxe51,058 played, 21 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.