Rapport-Jobava System
At 1400–1799 Elo, theory ends around half-move 13. The move that leaves it is a mistake in 13% of cases, 4.3 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 139912half-movehalf of the games: 11 to 15
- 1400–179913half-movehalf of the games: 11 to 15
- 1800+14half-movehalf of the games: 12 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 theory4.9%
- The move that leaves it19.5%
- After it15.0%
4.0× the risk of a move inside theory
1400–1799
- Inside theory3.1%
- The move that leaves it13.3%
- After it11.5%
4.3× the risk of a move inside theory
1800+
- Inside theory1.6%
- The move that leaves it8.1%
- After it8.2%
5.2× 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 d5 2. Nc3 Nf6 3. Bf4 c5 4. e3 Nc64,442 played, 17.3 points lost
- 1. d4 d5 2. Nc3 Nf6 3. Bf4 Nc6 4. Nb5 e5 5. Bxe5 Nxe5 6. dxe5 Ne43,646 played, 13.1 points lost
- 1. d4 d5 2. Nc3 Nf6 3. Bf4 Nc6 4. Nb5 e5 5. dxe5 Ne43,405 played, 24.8 points lost
- 1. d4 d5 2. Nc3 Nf6 3. Bf4 c5 4. Nb52,445 played, 18.3 points lost
- 1. d4 Nf6 2. Nc3 e6 3. Bf4 d5 4. e3 c5 5. Nf3 Nc62,096 played, 19.8 points lost
- 1. d4 d5 2. Nc3 Nf6 3. Bf4 Nc6 4. Nb5 e5 5. dxe5 Ne4 6. e61,911 played, 23.7 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.