Grob Opening
Where theory ends, and what the first move outside it costs.
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 13996half-movehalf of the games: 5 to 7
- 1400–17997half-movehalf of the games: 6 to 8
- 1800+7half-movehalf of the games: 6 to 9
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
Not enough moves for a reliable number.
1400–1799
Not enough moves for a reliable number.
1800+
- Inside theory8.4%
- The move that leaves it15.1%
- After it10.6%
1.8× 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. g4 e5 2. Bg2 Nf63,154 played, 14.8 points lost
- 1. g4 d5 2. Bg2 Nf62,998 played, 10.9 points lost
- 1. g4 d5 2. Bg2 Bxg4 3. c4 Be62,667 played, 12.2 points lost
- 1. g4 e5 2. Bg2 d5 3. c4 e4800 played, 16.9 points lost
- 1. g4 e5 2. Bg2 d5 3. c4 Nf6740 played, 11.9 points lost
- 1. g4 d5 2. Bg2 Bxg4 3. c4 c6 4. cxd5 cxd5 5. Qb3 e6687 played, 32.4 points lost
Where does your theory end?
Enter your Lichess name and see your own positions. Free, in your browser, no sign-up.
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.