Philidor Defense
At 1400–1799 Elo, theory ends around half-move 13. The move that leaves it is a mistake in 14% of cases, 3.3 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
- 1400–179913half-movehalf of the games: 11 to 15
- 1800+14half-movehalf of the games: 11 to 16
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 theory5.8%
- The move that leaves it20.6%
- After it16.3%
3.5× the risk of a move inside theory
1400–1799
- Inside theory4.1%
- The move that leaves it13.8%
- After it11.8%
3.3× the risk of a move inside theory
1800+
- Inside theory2.5%
- The move that leaves it9.4%
- After it8.9%
3.8× 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. Nf3 d6 3. d4 f626,574 played, 10.5 points lost
- 1. e4 e5 2. Nf3 d6 3. d4 f6 4. dxe513,052 played, 13.2 points lost
- 1. e4 e5 2. Nf3 d6 3. Bc4 f512,461 played, 12.3 points lost
- 1. e4 e5 2. d4 d6 3. Nf3 f58,660 played, 12.2 points lost
- 1. e4 e5 2. Nf3 d6 3. Nc3 f57,235 played, 10.7 points lost
- 1. e4 e5 2. Nf3 d6 3. Bc4 Bg4 4. h3 Bxf3 5. Qxf3 Qf66,880 played, 10.4 points lost
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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.