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Opening

Alekhine Defense

At 1400–1799 Elo, theory ends around half-move 11. The move that leaves it is a mistake in 15% of cases, 5.0 times as often as a move inside it.

All openings

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 1399
    9
    half-move
    half of the games: 7 to 11
  • 1400–1799
    11
    half-move
    half of the games: 9 to 14
  • 1800+
    13
    half-move
    half 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 theory4.4%
  • The move that leaves it20.8%
  • After it17.9%

4.8× the risk of a move inside theory

1400–1799

  • Inside theory3.0%
  • The move that leaves it15.3%
  • After it12.2%

5.0× the risk of a move inside theory

1800+

  • Inside theory1.5%
  • The move that leaves it9.6%
  • After it8.5%

6.4× 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. 1. e4 Nf6 2. Bc421,134 played, 13.9 points lost
  2. 1. e4 Nf6 2. Qf39,124 played, 10.5 points lost
  3. 1. e4 Nf6 2. f37,021 played, 11.8 points lost
  4. 1. e4 Nf6 2. Nc3 d5 3. Nf35,463 played, 10.8 points lost
  5. 1. e4 Nf6 2. e5 Nd5 3. d4 Nc63,907 played, 11.3 points lost
  6. 1. e4 Nf6 2. f43,721 played, 15 points lost

Where does your theory end?

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More openings

Opening names from the Lichess opening database (CC0). A game belongs to the most specific named opening it reaches within 39 half-moves.