Horwitz Defense
At 1400–1799 Elo, theory ends around half-move 10. The move that leaves it is a mistake in 7% of cases, 7.7 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 11
- 1400–179910half-movehalf of the games: 8 to 12
- 1800+11half-movehalf of the games: 8 to 13
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 theory1.4%
- The move that leaves it10.6%
- After it15.4%
7.6× the risk of a move inside theory
1400–1799
- Inside theory0.9%
- The move that leaves it6.9%
- After it10.5%
7.7× the risk of a move inside theory
1800+
- Inside theory0.6%
- The move that leaves it4.8%
- After it7.4%
8.5× 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. Bg59,089 played, 35 points lost
- 1. d4 e6 2. Bf4 Qh42,531 played, 10.2 points lost
- 1. d4 e6 2. Bg5 d52,157 played, 71.8 points lost
- 1. d4 e6 2. Nf3 c5 3. Bf4 cxd4 4. Nxd41,910 played, 19.7 points lost
- 1. d4 e6 2. Nc3 Qf61,651 played, 10.4 points lost
- 1. d4 e6 2. Bg5 Be71,056 played, 32.1 points lost
Where does your theory end?
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Try it on your own gamesMore openings
Opening names from the Lichess opening database (CC0). A game belongs to the most specific named opening it reaches within 39 half-moves.