Analyze Game
The Analyze Game feature enables you to examine chess games through engine evaluations and database references.
Getting Started
Section titled “Getting Started”- Import a game
- Open the Analysis tab
- Select “Generate Report”
Analysis Options
Section titled “Analysis Options”Reverse Analysis
Section titled “Reverse Analysis”Reverse analysis is the default setting. Since most chess engines can utilize information on positions previously analyzed, the most efficient analysis is done by starting from the end.
Annotate Novelties
Section titled “Annotate Novelties”Adds comments to positions not found in reference databases, flagging them as novel moves.
Annotation Metrics
Section titled “Annotation Metrics”The system evaluates moves using three primary metrics:
Win% Loss
Section titled “Win% Loss”Derived from real game data using the formula:
Win% = 50 + 50 * (2 / (1 + exp(-0.00368208 * centipawns)) - 1)This formula is sourced from Lichess methodology.
Only Sound Move
Section titled “Only Sound Move”Runs the engine with MultiPV 2 to determine if the best move is uniquely viable.
Sacrifice Detection
Section titled “Sacrifice Detection”Employs an Alpha-Beta engine; moves worse than the previous position qualify as sacrifices.
Annotation Symbols
Section titled “Annotation Symbols”The platform assigns these symbols based on move quality:
| Symbol | Name | Criteria |
|---|---|---|
!! | Brilliant | Sacrifices that are the only sound option |
! | Good | Sound moves punishing opponent errors |
!? | Interesting | Non-sound sacrifices |
?! | Dubious | 5-10% win probability loss |
? | Mistake | 10-20% win loss |
?? | Blunder | 20-100% win loss |
This documentation is based on the original En Croissant docs by Francisco Salgueiro.